Burr-BrownAudio
1
FEATURES
APPLICATIONS
PCM3168A
PCM3168A-Q1
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......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
24-Bit, 96-kHz/192-kHz, 6-In/8-Out Audio Codec with Differential Input/Output
•FLEXIBLE MODE CONTROL:
2345
•24-BIT Δ Σ ADC AND DAC – Four-Wire SPI™, Two-Wire I
2
C™Compatible Serial Control Interface or•SIX-CHANNEL ADC:
Hardware Control– High Performance: Differential and
•MULTIPLE FUNCTIONS VIA SPI OR I
2
C I/F:Single-Ended, f
S
= 48 kHz
– Audio I/F Mode/Format Select for ADC and– THD+N: – 93 dB (Differential), – 93 dB
DAC(Single-Ended)
– Digital Attenuation and Soft Mute for ADC– SNR: 107 dB (Differential), 104 dB
and DAC(Single-Ended)
– Digital De-Emphasis: 32 kHz, 44.1 kHz,– Dynamic Range: 107 dB (Differential),
48 kHz for DAC104 dB (Single-Ended)
– Data Polarity Control for ADC and DAC– Sampling Rate: 8 kHz to 96 kHz
– Power Down ADC/DAC Independently– System Clock: 256 f
S
, 384 f
S
, 512 f
S
, 768 f
S
•MULTI FUNCTIONS VIA H/W CONTROL:– Differential Voltage Input: 2 V
RMS
– Audio I/F Mode/Format Select– Single-Ended Voltage Input: 1 V
RMS
– Digital De-Emphasis Filter:– Decimation Filter:
44.1 kHz for DAC– Passband Ripple: ± 0.035 dB
•EXTERNAL RESET PIN:– Stop Band Attenuation: – 75 dB
– ADC/DAC Simultaneous– On-Chip, High-Pass Filter:
•AUDIO INTERFACE MODE:0.96 Hz at f
S
= 48 kHz
– ADC/DAC Independent Master/Slave– Overflow Flag
•AUDIO DATA FORMAT:•EIGHT-CHANNEL DAC:
– ADC/DAC Independent I
2
S™, Left-Justified,– High Performance: Differential, f
S
= 48 kHz
Right-Justified, DSP, TDM– THD+N: – 94 dB
•POWER SUPPLIES: 5 V for Analog and– SNR: 112 dB
3.3 V for Digital– Dynamic Range: 112 dB
•PACKAGE: HTQFP-64– Sampling Rate: 8 kHz to 192 kHz
•OPERATING TEMPERATURE RANGE:– System Clock: 128 f
S
, 192 f
S
, 256 f
S
, 384 f
S
,
– Consumer Grade: – 40 ° C to +85 ° C512 f
S
, 768 f
S
– Automotive Audio Grade: – 40 ° C to +105 ° C– Differential Voltage Output: 8 V
PP
– Analog Low-Pass Filter Included– 4x/8x Oversampling Digital Filter:
•CAR AUDIO EXTERNAL AMPLIFIERS– Passband Ripple: ± 0.0018 dB
•CAR AUDIO AVN APPLICATIONS– Stop Band Attenuation: – 75 dB
•HOME THEATERS– Zero Flag
•AV RECEIVERS
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2PowerPAD is a trademark of Texas Instruments Incorporated.3SPI is a trademark of Motorola.4I2C, I2S are trademarks of NXP Semiconductors.5All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008, Texas Instruments IncorporatedProducts conform to specifications per the terms of the TexasInstruments standard warranty. Production processing does notnecessarily include testing of all parameters.
DESCRIPTION
ORDERING INFORMATION
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
www.ti.com
The PCM3168A and PCM3168A-Q1 are high-performance, single-chip, 24-bit, 6-in/8-out, audio coders/decoders(codecs) with single-ended and differential selectable analog inputs and differential outputs. The six-channel,24-bit analog-to-digital converter (ADC) employs a delta-sigma ( Δ Σ ) modulator and supports 8-kHz to 96-kHzsampling rates and a 16-bit/24-bit width digital audio output word on the audio interface. The eight-channel,24-bit digital-to-analog converter (DAC) employs a Δ Σ modulator and supports 8-kHz to 192-kHz sampling ratesand a 16-bit/24-bit width digital audio input word on the audio interface. Each audio interface supports I
2
S,left-justified, right-justified, and DSP formats with 16-bit/24-bit word width. In addition, the PCM3168A andPCM3168A-Q1 support the time-division-multiplexed (TDM) format.
The PCM3168A and PCM3168A-Q1 can be controlled through a four-wire, SPI-compatible interface, or two-wire,I
2
C-compatible serial interface in software, which provides access to all functions including digital attenuation,soft mute, de-emphasis, and so forth. Also, hardware control mode provides a subset of user-programmablefunctions through four control pins. The PCM3168A and PCM3168A-Q1 are available in a 12-mm × 12-mm(10-mm × 10-mm body) HTQFP-64 PowerPAD™ package.
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled withappropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be moresusceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
For the most current package and ordering information see the Package Option Addendum at the end of thisdocument, or see the TI web site at www.ti.com .
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ABSOLUTE MAXIMUM RATINGS
(1)
RECOMMENDED OPERATING CONDITIONS
PCM3168A
PCM3168A-Q1
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......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
Over operating free-air temperature range (unless otherwise noted).
PCM3168A, PCM3168A-Q1 UNIT
Supply voltage: VCCAD1, VCCAD2, VCCDA1, VCCDA2 – 0.3 to +6.5 VSupply voltage: VDD1, VDD2 – 0.3 to +4.0 VGround voltage differences:
± 0.1 VAGNDAD1, AGNDAD2, AGNDDA1, AGNDDA2, DGND1, DGND2Supply voltage differences: VCCAD1, VCCAD2, VCCDA1, VCCDA2 ± 0.1 VSupply voltage differences: VDD1, VDD2 ± 0.1 VDigital input voltage: RST, MS, MC, MDI, SCK – 0.3 to +6.5 VDigital input voltage:
– 0.3 to (VDD + 0.3) < +4.0 VBCKAD/DA, LRCKAD/DA, DIN1/2/3/4, DOUT1/2/3, MODE, OVF, ZERO, MDOAnalog input voltage: VIN1-6 ± , VCOMAD/DA, VOUT1-8 ± , VREFAD1/2 – 0.3 to (VCC + 0.3) < +6.5 VInput current (all pins except supplies) ± 10 mAAmbient temperature range (under bias) – 40 to +125 ° CStorage temperature – 55 to +150 ° CJunction temperature +150 ° CLead temperature (soldering, 5s) +260 ° CPackage temperature (IR reflow, peak) +260 ° C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratingsonly and functional operation of the device at these or any other conditions beyond those indicated under recommended operatingconditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Over operating free-air temperature range (unless otherwise noted).
PCM3168A, PCM3168A-Q1
PARAMETER MIN TYP MAX UNIT
Analog supply voltage, VCC 4.5 5.0 5.5 VDigital supply voltage, VDD 3.0 3.3 3.6 VDigital Interface LVTTL compatibleSampling frequency,
8 96/192
(1)
kHzLRCKAD/LRCKDA
(1)Digital input clock frequency
System clock frequency, SCKI 2.048 36.864 MHzSingle-ended 1 V
RMSAnalog input level
Differential 2 V
RMS
Analog output voltage Differential 8 V
PP
To ac-coupled GND 5 k ΩAnalog output load resistance
To dc-coupled GND 15 k Ω
Analog output load capacitance 50 pFDigital output load capacitance 20 pFPCM3168A Consumer grade – 40 +25 +85 ° COperating free-air temperature
PCM3168A-Q1 Automotive audio grade – 40 +25 +105 ° C
(1) 192 kHz is supported only for DAC.
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ELECTRICAL CHARACTERISTICS: Digital Input/Output
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
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All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
PCM3168A, PCM3168A-Q1
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DATA FORMAT
Audio data interface format I
2
S, LJ, RJ, DSP, TDMAudio data word length 16, 24 BitsAudio data format MSB first, twos complementSampling frequency, ADC 8 48 96 kHzf
SSampling frequency, DAC 8 48 192 kHz128 f
S
, 192 f
S
, 256 f
S
,System clock frequency 2.048 36.864 MHz384 f
S
, 512 f
S
, 768 f
S
INPUT LOGIC
V
IH
(1) (2)
2.0 VDD VDCInput logic level
V
IL
(1) (2)
0.8 VDCV
IH
(3) (4)
2.0 5.5 VDCInput logic level
V
IL
(3) (4)
0.8 VDCI
IH
(2) (3)
V
IN
= VDD ± 10 µAInput logic level
I
IL
(2) (3)
V
IN
= 0 V ± 10 µAI
IH
(1) (4)
V
IN
= VDD +65 +100 µAInput logic level
I
IL
(1) (4)
V
IN
= 0 V ± 10 µA
OUTPUT LOGIC
V
OH
(5)
I
OUT
= – 4 mA 2.4 VDCOutput logic level
V
OL
(5) (6)
I
OUT
= +4 mA 0.4 VDC
REFERENCE INPUT/OUTPUT
VREFAD1 output voltage VCCAD1 VVREFAD2 output voltage AGNDAD1 V0.5 ×VCOMAD output voltage VVCCAD1VCOMAD output impedance 10 k Ω
Allowable VCOMAD output source/sink current 1 µA0.5 ×VCOMDA output voltage VVCCDA1VCOMDA output impedance 7.5 k Ω
Allowable VCOMDA output source/sink current 1 µA
(1) BCKAD, BCKDA, LRCKAD, and LRCKDA (in slave mode, Schmitt trigger input with 50-k Ωtypical internal pull-down resistor).(2) DIN1/2/3/4 and MDO/ADR1/MD1. (Except SPI mode, Schmitt trigger input).(3) SCKI, MDI/SDA/DEMP, and MC/SCL/FMT (Schmitt trigger input, 5-V tolerant).(4) RST and MS/ADR0/MD0 (Schmitt trigger input with 50-k Ωtypical internal pull-down resistor, 5-V tolerant).(5) BCKAD, BCKDA, LRCKAD, and LRCKDA (in master mode), DOUT1/2/3, ZERO, OVF, and MDO/ADR1/MD1 (in SPI mode).(6) SDA (in I
2
C mode, open-drain low output).
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Product Folder Link(s): PCM3168A PCM3168A-Q1
ELECTRICAL CHARACTERISTICS: ADC Characteristics
PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
PCM3168A, PCM3168A-Q1
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ADC CHARACTERISTICS
Resolution 16 24 Bits0.2 ×V
IN
= 0 dB, Single-ended V
RMSVCCAD1Full-scale input voltage
0.4 ×V
IN
= 0 dB, Differential V
RMSVCCAD1
0.5 ×Center voltage VVCCAD1Input impedance 45 k Ω
Common-mode rejection ratio 80 dB
DC ACCURACY
Gain mismatch channel-to-channel Full-scale input, V
IN
± 2.0 ± 6 % of FSRGain error Full-scale input, V
IN
± 2.0 ± 6 % of FSRBipolar zero error High-pass filter bypass, V
IN
± 1.0 % of FSR
DYNAMIC PERFORMANCE
(1) (2)
f
S
= 48 kHz, Differential – 93 – 87 dBf
S
= 96 kHz, Differential – 93 dBTHD+N, V
IN
= – 1 dB
f
S
= 48 kHz, Single-ended – 93 dBf
S
= 96 kHz, Single-ended – 93 dBf
S
= 48 kHz, A-weighted, differential 100 107 dBf
S
= 96 kHz, A-weighted, differential 107 dBf
S
= 48 kHz, A-weighted,Dynamic range
104 dBsingle-ended
f
S
= 96 kHz, A-weighted,
104 dBsingle-ended
f
S
= 48 kHz, A-weighted, differential 100 107 dBf
S
= 96 kHz, A-weighted, differential 107 dBf
S
= 48 kHz, A-weighted,S/N ratio
104 dBsingle-ended
f
S
= 96 kHz, A-weighted,
104 dBsingle-ended
f
S
= 48 kHz, Differential 98 104 dBf
S
= 96 kHz, Differential 104 dBChannel separation
(between one channel and others)
f
S
= 48 kHz, Single-ended 101 dBf
S
= 96 kHz, Single-ended 101 dB
(1) In differential mode at VINx ± pin, f
IN
= 1 kHz, using Audio Precision System II, RMS mode with 20-kHz low-pass filter and 400-Hzhigh-pass filter.(2) f
S
= 48 kHz : SCKI = 512 f
S
(single), f
S
= 96 kHz : SCKI = 256 f
S
(dual), f
S
= 192 kHz : SCKI = 128 f
S
(quad).
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ELECTRICAL CHARACTERISTICS: DAC Characteristics
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
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ELECTRICAL CHARACTERISTICS: ADC Characteristics (continued)All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
PCM3168A, PCM3168A-Q1
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DIGITAL FILTER PERFORMANCE
Passband (single) 0.454 × f
S
HzPassband (dual) 0.454 × f
S
HzStop band (single) 0.555 × f
S
HzStop band (dual) 0.597 × f
S
HzPassband ripple < 0.454 × f
S
, 0.454 × f
S
± 0.035 dBStop band attenuation > 0.555 × f
S
, 0.597 × f
S
– 75 dBGroup delay time (single) 27/f
S
secGroup delay time (dual) 17/f
S
sec0.02 ×High-pass filter frequency response – 3 dB Hzf
S
/1000
All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
PCM3168A, PCM3168A-Q1
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DAC CHARACTERISTICS
Resolution 16 24 Bits
DC ACCURACY
Gain mismatch channel-to-channel ± 2.0 ± 6 % of FSRGain error ± 2.0 ± 6 % of FSRBipolar zero error ± 1.0 % of FSR
DYNAMIC PERFORMANCE
(1) (2)
f
S
= 48 kHz – 94 – 88 dBTHD+N, V
OUT
= 0 dB f
S
= 96 kHz – 94 dBf
S
= 192 kHz – 94 dBf
S
= 48 kHz, EIAJ, A-weighted 105 112 dBDynamic range f
S
= 96 kHz, EIAJ, A-weighted 112 dBf
S
= 192 kHz, EIAJ, A-weighted 112 dBf
S
= 48 kHz, EIAJ, A-weighted 105 112 dBS/N ratio f
S
= 96 kHz, EIAJ, A-weighted 112 dBf
S
= 192 kHz, EIAJ, A-weighted 112 dBf
S
= 48 kHz 102 108 dBChannel separation
f
S
= 96 kHz 108 dB(between one channel and others)
f
S
= 192 kHz 108 dB
(1) In differential mode at VOUTx ± pin, f
OUT
= 1 kHz, using Audio Precision System II, RMS mode with 20-kHz low-pass filter and 400-Hzhigh-pass filter.(2) f
S
= 48 kHz : SCKI = 512 f
S
(single), f
S
= 96 kHz : SCKI = 256 f
S
(dual), f
S
= 192 kHz : SCKI = 128 f
S
(quad).
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PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
ELECTRICAL CHARACTERISTICS: DAC Characteristics (continued)All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
PCM3168A, PCM3168A-Q1
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ANALOG OUTPUT
1.6 ×Output voltage Differential V
PPVCCDA1
0.5 ×Center voltage VVCCDA1To ac-coupled GND
(3)
5 k ΩLoad impedance
To dc-coupled GND
(3)
15 k Ω
f = 20 kHz – 0.04 dBLow-pass filter frequency response
f = 44 kHz – 0.18 dB
DIGITAL FILTER PERFORMANCE
(4)
Sharp roll-offPassband (single, dual) 0.454 × f
S
HzPassband (quad) 0.432 × f
S
HzStop band (single, dual) 0.546 × f
S
HzStop band (quad) 0.569 × f
S
HzPassband ripple < 0.454 × f
S
, 0.432 × f
S
± 0.0018 dBStop band attenuation > 0.546 × f
S
, 0.569 × f
S
– 75 dB
DIGITAL FILTER PERFORMANCE Slow roll-offPassband 0.328 × f
S
HzStop band 0.673 × f
S
HzPassband ripple < 0.328 × f
S
± 0.0013 dBStop band attenuation > 0.673 × f
S
– 75 dB
DIGITAL FILTER PERFORMANCE
(4)
Group delay time (single, dual) 28/f
S
secGroup delay time (quad) 19/f
S
secDe-emphasis error ± 0.1 dB
POWER-SUPPLY REQUIREMENTS
VCCxx1/2 4.5 5.0 5.5 VDCVoltage range
VDD1/2 3.0 3.3 3.6 VDCf
S
= 48 kHz/ADC, f
S
= 48 kHz/DAC 162 210 mAI
CC
f
S
= 96 kHz/ADC, f
S
= 192 kHz/DAC 162 mAFull power-down
(5)
300 µASupply current
f
S
= 48 kHz/ADC, f
S
= 48 kHz/DAC 106 130 mAI
DD
f
S
= 96 kHz/ADC, f
S
= 192 kHz/DAC 127 mAFull power-down
(5)
50 µAf
S
= 48 kHz/ADC, f
S
= 48 kHz/DAC 1160 1480 mWf
S
= 96 kHz/ADC, f
S
= 192 kHz/DAC 1230 mWPower dissipation f
S
= 48 kHz/ADC, Power-down/DAC 660 mWPower-down/ADC, f
S
= 48 kHz/DAC 633 mWFull power-down
(5)
1.67 mW
(3) Allowable minimum input resistance of differential to single-ended converter with D to S Gain = G is calculated as (1 + 2G)/(1 + G) × 5kfor ac-coupled and (1+ 0.9G)/(1 + G) × 15k for dc-coupled connection, refer to Figure 62 and Figure 63 of the Application Informationsection.
(4) Exclude single and dual at 128 f
S
, 192 f
S
system clock and quad at 256 f
S
to 768 f
S
system clock, and specifications for quad, single,and dual are respectively applied in reverse for them.(5) Halt SCKI, BCKAD, BCKDA, LRCKAD, and LRCKDA.
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DEVICE INFORMATION
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
MODE
DGND1
VDD1
MS/ADR0/MD0
MDO/ADR1/MD1
MDI/SDA/DEMP
MC/SCL/FMT
SCKI
DIN4
DIN3
DIN2
DIN1
BCKDA
LRCKDA
VCCDA2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VCOMAD
AGNDAD2
VCCAD2
RST
OVF
LRCKAD
BCKAD
DOUT1
DOUT2
DOUT3
DGND2
VDD2
ZERO
VCCDA1
VCOMDA
AGNDDA1
VIN6+
VOUT8+
VIN6-
VOUT8-
VIN5+
VOUT7+
VIN5-
VOUT7-
VREFAD2
VOUT6+
AREFAD1
VOUT6-
VIN4+
VOUT5+
VIN4-
VOUT5-
VIN3+
VOUT4+
VIN3-
VOUT4-
VIN2+
VOUT3+
VIN2-
VOUT3-
VIN1+
VOUT2+
VIN1-
VOUT2-
AGNDAD1
VOUT1+
VCCAD1
VOUT1-
64 63 62 61 60 59 58 57 56 55 54
17 18 19 20 21 22 23 24 25 26 27
53 52 51 50 49
28 29 30 31 32
PCM3168A
PCM3168A-Q1
PowerPAD
(ConnectedtoAnalogGround)
AGNDDA2
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
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ELECTRICAL CHARACTERISTICS: DAC Characteristics (continued)All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
PCM3168A, PCM3168A-Q1
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
TEMPERATURE RANGE
PCM3168A Consumer grade – 40 +85 ° COperating temperature
PCM3168A-Q1 Automotive audio
– 40 +105 ° CgradeThermal resistance θ
JA
HTQFP-64 +21 ° C/W
HTQFP-64 (12 mm x 12 mm)(10-mm x 10-mm body, 0.5-mm pitch)(TOP VIEW)
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PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
TERMINAL FUNCTIONS
TERMINAL
PULL- 5-VNAME PIN I/O DOWN TOLERANT DESCRIPTION
VCOMAD 1 — No No ADC analog common voltage decouplingAGNDAD2 2 — No No Analog ground 2 for ADCVCCAD2 3 — No No ADC analog power supply 2, +5 VRST 4 I Yes Yes Reset and power-down control input with active lowOVF 5 O No No Overflow flag output for ADCLRCKAD 6 I/O Yes No Audio data word clock input/output for ADCBCKAD 7 I/O Yes No Audio data bit clock input/output for ADCDOUT1 8 O No No Audio data digital output for ADC1 and ADC2DOUT2 9 O No No Audio data digital output for ADC3 and ADC4DOUT3 10 O No No Audio data digital output for ADC5 and ADC6DGND2 11 — No No Digital ground 2VDD2 12 — No No Digital power supply 2, +3.3 VZERO 13 O No No Zero detect flag output for DACVCCDA1 14 — No No DAC analog power supply 1, +5 VVCOMDA 15 — No No DAC voltage common decouplingAGNDDA1 16 — No No Analog ground 1 for DACVOUT8+ 17 O No No Positive analog output from DAC8VOUT8 – 18 O No No Negative analog output from DAC8VOUT7+ 19 O No No Positive analog output from DAC7VOUT7 – 20 O No No Negative analog output from DAC7VOUT6+ 21 O No No Positive analog output from DAC6VOUT6 – 22 O No No Negative analog output from DAC6VOUT5+ 23 O No No Positive analog output from DAC5VOUT5 – 24 O No No Negative analog output from DAC5VOUT4+ 25 O No No Positive analog output from DAC4VOUT4 – 26 O No No Negative analog output from DAC4VOUT3+ 27 O No No Positive analog output from DAC3VOUT3 – 28 O No No Negative analog output from DAC3VOUT2+ 29 O No No Positive analog output from DAC2VOUT2 – 30 O No No Negative analog output from DAC2VOUT1+ 31 O No No Positive analog output from DAC1VOUT1 – 32 O No No Negative analog output from DAC1AGNDDA2 33 — No No Analog ground 2 for DACVCCDA2 34 — No No DAC analog power supply 2, +5 VLRCKDA 35 I/O Yes No Audio data word clock input/output for DACBCKDA 36 I/O Yes No Audio data bit clock input/output for DACDIN1 37 I No No Audio data input for DAC1 and DAC2DIN2 38 I No No Audio data input for DAC3 and DAC4DIN3 39 I No No Audio data input for DAC5 and DAC6DIN4 40 I No No Audio data Input for DAC7 and DAC8SCKI 41 I No Yes System clock inputMC/SCL/FMT 42 I No Yes Clock for SPI, clock for I
2
C, format select for hardware control modeInput data for SPI, data for I
2
C
(1)
, de-emphasis control for hardwareMDI/SDA/DEMP 43 I/O No Yes
control mode
(1) Open-drain configuration in I
2
C.
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PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
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TERMINAL FUNCTIONS (continued)
TERMINAL
PULL- 5-VNAME PIN I/O DOWN TOLERANT DESCRIPTION
Output data for SPI
(2)
, address select 1 for I
2
C, mode select 1 forMDO/ADR1/MD1 44 I/O No No
hardware control modeChip select for SPI, address select 0 for I
2
C, mode select 0 forMS/ADR0/MD0 45 I Yes Yes
hardware control modeVDD1 46 — No No Digital power supply 1, +3.3 VDGND1 47 — No No Digital ground 1Control port mode selection. Tied to VDD: SPI, pull-up: H/WMODE 48 I No No single-ended input, pull-down: H/W and differential input, tied toDGND: I
2
CVCCAD1 49 — No No ADC analog power supply 1, +5 VAGNDAD1 50 — No No Analog ground 1 for ADCVIN1 – 51 I No No Negative analog input to ADC1VIN1+ 52 I No No Positive analog input to ADC1VIN2 – 53 I No No Negative analog input to ADC2VIN2+ 54 I No No Positive analog input to ADC2VIN3 – 55 I No No Negative analog input to ADC3VIN3+ 56 I No No Positive analog input to ADC3VIN4 – 57 I No No Negative analog input to ADC4VIN4+ 58 I No No Positive analog input to ADC4VREFAD1 59 — No No ADC analog reference voltage 1 decouplingVREFAD2 60 — No No ADC analog reference voltage 2 decouplingVIN5 – 61 I No No Negative analog input to ADC5VIN5+ 62 I No No Positive analog input to ADC5VIN6 – 63 I No No Negative analog input to ADC6VIN6+ 64 I No No Positive analog input to ADC6
(2) 3-state (Hi-Z) operation in SPI.
10 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): PCM3168A PCM3168A-Q1
FUNCTIONAL BLOCK DIAGRAM
DAC
VOUT1+
LRCKAD
BCKAD
DOUT1
DOUT2
DOUT3
SCKI
DIN1
DIN2
DIN3
DIN4
LRCKDA
BCKDA
VOUT1-
DAC
VOUT2+
VOUT2-
DAC
VOUT3+
VOUT3-
DAC
VOUT4+
VOUT4-
DAC
VOUT5+
VOUT5-
DAC
VOUT6+
VOUT6-
ADC
VIN1+
VIN1-
ADC
VIN2+
VIN2-
ADC
VIN3+
VIN3-
ADC
VIN4+
VIN4-
ADC
VIN5+
VIN5-
ADC
VIN6+
VIN6-
VCCAD1/2
VCCDA1/2
AGNDAD1/2
AGNDDA1/2
VDD1
VDD2
DGND1
DGND2
DAC
VOUT7+
VOUT7-
DAC
VOUT8+
VOUT8-
VREFAD1
VREFAD2
VCOMAD
VCOMDA
OVF
RST
MODE
MS/ADR0/MD0
MDO/ADR1/MD1
MDI/SDA/DEMP
MC/SCL/FMT
ZERO
AudioSerialInterfaceandClockControl
Digital
Filter
and
Volume
Digital
Filter
and
Volume
ModeControlPort
(SPI/I C)
2
Commonand
Reference
PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 11
Product Folder Link(s): PCM3168A PCM3168A-Q1
TYPICAL CHARACTERISTICS
0
20
40
60
80
100
120
140
160
180
200
-
-
-
-
-
-
-
-
-
-
8
Amplitude(dB)
NormalizedFrequency(f )
S
0 642
0.20
0.15
0.10
0.05
0
0.05
0.10
0.15
0.20
-
-
-
-
0.5
Amplitude(dB)
NormalizedFrequency(f )
S
0 0.30.20.1 0.4
0
20
40
60
80
100
120
140
160
180
200
-
-
-
-
-
-
-
-
-
-
4
Amplitude(dB)
NormalizedFrequency(f )
S
0 321
0.20
0.15
0.10
0.05
0
0.05
0.10
0.15
0.20
-
-
-
-
0.5
Amplitude(dB)
NormalizedFrequency(f )
S
0 0.30.20.1 0.4
0
5
10
15
20
25
30
35
40
-
-
-
-
-
-
-
-
0.0010
Amplitude(dB)
NormalizedFrequency(f )
S
0 0.00060.00040.0002 0.0008
0
5
10
15
20
25
30
35
40
-
-
-
-
-
-
-
-
0.0
0.
0.
0.
0.
0.
0.
0.
0.010
Amplitude(dB)
NormalizedFrequency(f )
S
0 0.0060.0040.002 0.008
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
www.ti.com
ADC Digital FilterAll specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
FREQUENCY RESPONSE FREQUENCY RESPONSE PASSBAND(Single Rate) (Single Rate)
Figure 1. Figure 2.
FREQUENCY RESPONSE FREQUENCY RESPONSE PASSBAND(Dual Rate) (Dual Rate)
Figure 3. Figure 4.
HPF FREQUENCY RESPONSE HPF FREQUENCY RESPONSE PASSBAND
Figure 5. Figure 6.
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DAC Digital Filter
0
20
40
60
80
100
120
140
-
-
-
-
-
-
-
4
Amplitude(dB)
NormalizedFrequency(f )
S
0 32
1
Sharp
Slow
0.010
0.008
0.006
0.004
0.002
0
0.002
0.004
0.006
0.008
0.010
-
-
-
-
-
0.5
Amplitude(dB)
NormalizedFrequency(f )
S
0 0.30.2
0.1 0.4
Sharp
Slow
0
20
40
60
80
100
120
140
-
-
-
-
-
-
-
4
Amplitude(dB)
NormalizedFrequency(f )
S
0 32
1
Sharp
Slow
0.010
0.008
0.006
0.004
0.002
0
0.002
0.004
0.006
0.008
0.010
-
-
-
-
-
0.5
Amplitude(dB)
NormalizedFrequency(f )
S
0 0.30.2
0.1 0.4
Sharp
Slow
0
20
40
60
80
100
120
140
-
-
-
-
-
-
-
2.0
Amplitude(dB)
NormalizedFrequency(f )
S
0 1.51.0
0.5
Sharp
Slow
0.010
0.008
0.006
0.004
0.002
0
0.002
0.004
0.006
0.008
0.010
-
-
-
-
-
0.5
Amplitude(dB)
NormalizedFrequency(f )
S
0 0.30.2
0.1 0.4
Sharp
Slow
PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
FREQUENCY RESPONSE FREQUENCY RESPONSE PASSBAND(Single Rate) (Single Rate)
Figure 7. Figure 8.
FREQUENCY RESPONSE FREQUENCY RESPONSE PASSBAND(Dual Rate) (Dual Rate)
Figure 9. Figure 10.
FREQUENCY RESPONSE FREQUENCY RESPONSE PASSBAND(Quad Rate) (Quad Rate)
Figure 11. Figure 12.
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Link(s): PCM3168A PCM3168A-Q1
0
10
20
30
40
50
-
-
-
-
-
10M
Amplitude(dB)
Frequency(Hz)
1k 10k 100k 1M
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
www.ti.com
DAC Digital Filter (continued)All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
DE-EMPHASIS CHARACTERISTIC DE-EMPHASIS CHARACTERISTIC(f
S
= 48 kHz) (f
S
= 44 kHz)
Figure 13. Figure 14.
DE-EMPHASIS CHARACTERISTIC
(f
S
= 32 kHz) ANALOG FILTER CHARACTERISTIC
Figure 15. Figure 16.
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Product Folder Link(s): PCM3168A PCM3168A-Q1
ADC Performance
-
-
-
-
-
-
-
88
90
92
94
96
98
100
125
THD+N(dB)
Temperature( C)°
-50 -25 0 25 50 75 100
112
110
108
106
104
102
100
125
DynamicRangeandSNR(dB)
Temperature( C)°
-50 -25 0 25 50 75
SNR
DynamicRange
100
-
-
-
-
-
-
88
90
92
94
96
98
100-
5.50
THD+N(dB)
SupplyVoltage(V)
4.50 4.75 5.00 5.25
112
110
108
106
104
102
100
5.50
DynamicRangeandSNR(dB)
SupplyVoltage(V)
4.50 4.75 5.00 5.25
SNR
DynamicRange
PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
THD+N AT – 1 dB DYNAMIC RANGE AND SNRvs TEMPERATURE vs TEMPERATURE
Figure 17. Figure 18.
THD+N AT – 1 dB DYNAMIC RANGE AND SNRvs SUPPLY VOLTAGE vs SUPPLY VOLTAGE
Figure 19. Figure 20.
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 15
Product Folder Link(s): PCM3168A PCM3168A-Q1
DAC Performance
-
-
-
-
-
-
90
92
94
96
98
100
102-
125
THD+N(dB)
Temperature( C)°
-50 -25 0 25 50 75 100
116
114
112
110
108
106
104
125
DynamicRangeandSNR(dB)
Temperature( C)°
-50 -25 0 25 50 75
SNR
DynamicRange
100
90
92
94
96
98
100
102
-
-
-
-
-
-
-
5.50
THD+N(dB)
SupplyVoltage(V)
4.50 4.75 5.00 5.25
116
114
112
110
108
106
104
5.50
DynamicRangeandSNR(dB)
SupplyVoltage(V)
4.50 4.75 5.00 5.25
SNR
DynamicRange
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
www.ti.com
All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
DYNAMIC RANGE AND SNRTHD+N vs TEMPERATURE vs TEMPERATURE
Figure 21. Figure 22.
DYNAMIC RANGE AND SNRTHD+N vs SUPPLY VOLTAGE vs SUPPLY VOLTAGE
Figure 23. Figure 24.
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Product Folder Link(s): PCM3168A PCM3168A-Q1
Output Spectrum
0
20
40
60
80
100
120
140
160
-
-
-
-
-
-
-
-
20
Amplitude(dB)
Frequency(kHz)
0 5 10 15
0
20
40
60
80
100
120
140
160
-
-
-
-
-
-
-
-
20
Amplitude(dB)
Frequency(kHz)
0 5 10 15
0
20
40
60
80
100
120
140
160
-
-
-
-
-
-
-
-
20
Amplitude(dB)
Frequency(kHz)
0 5 10 15
0
20
40
60
80
100
120
140
160
-
-
-
-
-
-
-
-
20
Amplitude(dB)
Frequency(kHz)
0 5 10 15
PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
ADC OUTPUT SPECTRUM ADC OUTPUT SPECTRUM( – 1 dB, N = 32,768) ( – 60 dB, N = 32,768)
Figure 25. Figure 26.
DAC OUTPUT SPECTRUM DAC OUTPUT SPECTRUM(0 dB, N = 32,768) ( – 60 dB, N = 32,768)
Figure 27. Figure 28.
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 17
Product Folder Link(s): PCM3168A PCM3168A-Q1
Power-Supply
200
180
160
140
120
100
80
60
40
20
0
Power-SupplyCurrent(mA)
Power-SaveCondition
Operation ADCOffDACOff ClockOff
ICC
IDD
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
www.ti.com
All specifications at T
A
= +25 ° C, VCCAD1 = VCCAD2 = VCCDA1 = VCCDA2 = 5 V, VDD1 = VDD2 = 3.3 V, f
S
= 48 kHz,SCKI = 512 f
S
, 24-bit data, Sampling Mode = Auto for ADC and DAC, and Interface Mode = Slave for ADC and DAC, unlessotherwise noted.
POWER-SUPPLY CURRENT vs POWER-SAVE CONDITION
Figure 29.
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Product Folder Link(s): PCM3168A PCM3168A-Q1
PRODUCT OVERVIEW
ANALOG INPUTS
ANALOG OUTPUTS
PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
The PCM3168A and PCM3168A-Q1 are high-performance, multi-channel codecs targeted for automotive audioapplications such as external amplifiers, as well as home multi-channel audio applications (for example, hometheaters and A/V receivers). The PCM3168A and PCM3168A-Q1 consist of six-channel analog-to-digitalconverters (ADCs) and eight-channel digital-to-analog converters (DACs). The ADC input is selectable betweensingle-ended and differential inputs. The DAC output type is fixed with a differential configuration. ThePCM3168A and PCM3168A-Q1 support 24-bit linear PCM input and output data in standard audio formats(left-justified, right-justified, and I
2
S), DSP and TDM formats, and various sample frequencies from 8 kHz to 192kHz (the ADC configuration supports only up to 96 kHz). The TDM format is useful to save interface bus linenumbers for multi-channel audio data communication between the codec and digital audio processor. ThePCM3168A and PCM3168A-Q1 offer three modes for device control: two-wire I
2
C software, four-wire SPIsoftware, and hardware modes.
The PCM3168A and PCM3168A-Q1 include six ADCs, each with individual pairs of differential voltage input pins,as shown in Table 1 . Additionally, the PCM3168A and PCM3168A-Q1 have the capability of single-ended inputs.The full-scale input voltage is (0.2 × VCCAD1) V
RMS
at the single-ended input mode and (0.4 × VCCAD1) V
RMSat the differential input mode. The input mode is selected by the MODE pin in hardware control mode or byregister settings in the software control mode. In single-ended mode, VINx+ pins are used and VINx – pins mustbe terminated with AGNDAD1/2 via a capacitor or terminated with VCOMAD.
Table 1. Pin Assignments in Differential and Single-Ended Input Modes
CHANNEL DIFFERENTIAL INPUT MODE SINGLE-ENDED INPUT MODE
1 (ADC1) VIN1+, VIN1 – VIN1+2 (ADC2) VIN2+, VIN2 – VIN2+3 (ADC3) VIN3+, VIN3 – VIN3+4 (ADC4) VIN4+, VIN4 – VIN4+5 (ADC5) VIN5+, VIN5 – VIN5+6 (ADC6) VIN6+, VIN6 – VIN6+
The PCM3168A and PCM3168A-Q1 include eight DACs, each with individual pairs of differential voltage inputspins, as shown in Table 2 . The full-scale output voltage is (1.6 × VCCDA1) V
PP
in differential mode. DC-coupledloads are allowed in addition to ac-coupled loads if the load resistance conforms to the specification.
Table 2. Pin Assignments for Differential Output
CHANNEL DIFFERENTIAL OUTPUT
1 (DAC1) VOUT1+, VOUT1 –2 (DAC2) VOUT2+, VOUT2 –3 (DAC3) VOUT3+, VOUT3 –4 (DAC4) VOUT4+, VOUT4 –5 (DAC5) VOUT5+, VOUT5 –6 (DAC6) VOUT6+, VOUT6 –7 (DAC7) VOUT7+, VOUT7 –8 (DAC8) VOUT8+, VOUT8 –
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 19
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VOLTAGE REFERENCES
SYSTEM CLOCK INPUT
SystemClock
(SCKI)
High
Low
tSCL
tSCH
tSCY
2.0V
0.8V
SAMPLING MODE
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
www.ti.com
The PCM3168A and PCM3168A-Q1 include two internal references for the six-channel ADCs; these referencescorrespond to the outputs VREFAD1 and VREFAD2. Both reference pins should be connected with an analogground via decoupling capacitors. In addition, the PCM3168A and PCM3168A-Q1 include two pins forcommon-mode voltage output (VCOMDA for DACs and VCOMAD for ADCs). These pins should be alsoconnected with an analog ground via decoupling capacitors. Furthermore, both common pins can be used to biasexternal high-impedance circuits, if they are required.
The PCM3168A and PCM3168A-Q1 require an external system clock input applied at the SCKI input for ADCand DAC operation. The system clock operates at an integer multiple of the sampling frequency, or f
S
. Themultiples supported in ADC operation include 256 f
S
, 384 f
S
, 512 f
S
, and 768 f
S
; the multiples supported in DACoperation include 128 f
S
, 192 f
S
, 256 f
S
, 384 f
S
, 512 f
S
, and 768 f
S
. Details for these system clock multiples areshown in Table 3 .Figure 30 and Table 4 show the SCKI timing requirements.
Table 3. System Clock Frequencies for Common Audio Sampling Rates
SAMPLINGDEFAULT
FREQUENCY SYSTEM CLOCK FREQUENCY (MHz)SAMPLING
MODE f
S
(kHz) 128 f
S
(1)
192 f
S
(1)
256 f
S
384 f
S
512 f
S
768 f
S
8 N/A N/A 2.0480 3.0720
(2)
4.0960 6.144016 2.0480
(1)
3.0720
(1)
4.0960 6.1440
(2)
8.1920 12.2880Single rate 32 4.0960
(1)
6.1440
(1)
8.1920 12.2880
(2)
16.3840 24.576044.1 5.6488
(1)
8.4672
(1)
11.2896 16.9344
(2)
22.5792 33.868848 6.1440
(1)
9.2160
(1)
12.2880 18.4320
(2)
24.5760 36.864088.2 11.2896
(3)
16.9344
(3)
22.5792 33.8688 N/A N/ADual rate
96 12.2880
(3)
18.4320
(3)
24.5760 36.8640 N/A N/A176.4
(3)
22.5792
(3)
33.8688
(3)
N/A N/A N/A N/AQuad rate
(3)
192
(3)
24.5760
(3)
36.8640
(3)
N/A N/A N/A N/A
(1) Supported only by DAC operation(2) Requires 50% duty cycle for stable ADC performance.(3) Supported only by DAC operation
Figure 30. System Clock Timing Requirements
Table 4. Timing Requirements for Figure 30
SYMBOL PARAMETER MIN MAX UNIT
t
SCY
System clock pulse cycle time 27 nst
SCH
System clock pulse width high 10 nst
SCL
System clock pulse width low 10 nst
DTY
System clock pulse duty cycle 40 60 %
The PCM3168A and PCM3168A-Q1 support two sampling modes (single rate and dual rate) in ADC operation,and three sampling modes (single rate, dual rate, and quad rate) in DAC operation. In single rate mode, the ADCand DAC operate at an oversampling frequency of x128 (except when SCKI = 128 f
S
and 192 f
S
). This mode issupported for sampling frequencies less than 50 kHz. In dual rate mode, the ADC and DAC operate at an
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0
20
40
60
80
100
120
140
160
180
200
-
-
-
-
-
-
-
-
-
-
2.0
Amplitude(dB)
NormalizedFrequency(f )
S
0 0.5 1.0 1.5
DSM_Dual
DSM_Single
DF_Single
DF_Dual
0
20
40
60
80
100
120
140
160
180
200
-
-
-
-
-
-
-
-
-
-
2.0
Amplitude(dB)
NormalizedFrequency(f )
S
0 0.5 1.0 1.5
DSM_Dual
DSM_Single
DSM_Quad
DF_Dual
DF_Single
DF_Quad
PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
oversampling frequency of x64; this mode is supported for sampling frequencies less than 100 kHz. In quad ratemode, the DAC operates at an oversampling frequency of x32. The sampling mode is automatically selectedaccording to the ratio of system clock frequency and sampling frequency by default (for example, single rate for512 f
S
and 768 f
S
, dual rate for 256 f
S
and 384 f
S
, and quad rate for 128 f
S
and 192 f
S
), but manual selection isalso possible for specified combinations through the serial mode control resistor.
Table 5 and Figure 31 show the relation between the oversampling rate (OSR) of the Δ Σ modulator, noise-freeshaped bandwidth, and each sampling mode setting for ADC operation. Table 6 and Figure 32 describe therelation between the oversampling rate of the digital filter and Δ Σ modulator, noise-free shaped bandwidth, andeach sampling mode setting for DAC operation.
Table 5. ADC Modulator OSR and Noise-Free Shaped Bandwidthfor Each Sampling Mode
NOISE-FREE SHAPED BANDWIDTH (kHz)SAMPLING MODE SYSTEM CLOCK RATEREGISTER SETTING (f
S
) f
S
= 48 kHz f
S
= 96 kHz MODULATOR OSR
512, 768 40 N/A x128Auto
256, 384 20 40 x64512, 768 40 N/A x128Single
256, 384 40 N/A x128Dual 256, 384 20 40 x64
Table 6. DAC Digital Filter OSR, Modulator OSR, and Noise-Free Shaped Bandwidthfor Each Sampling Mode
NOISE-FREE SHAPEDBANDWIDTH
SAMPLING MODE SYSTEM CLOCK f
S
= 48 f
S
= 96 f
S
= 192REGISTER SETTING RATE (f
S
) kHz kHz kHz DIGITAL FILTER OSR MODULATOR OSR
512, 768 40 N/A N/A x8 x128Auto 256, 384 20 40 N/A x8 x64128, 192
(1) (2)
10 20 40 x4 x32512, 768 40 N/A N/A x8 x128Single 256, 384 40 N/A N/A x8 x128128, 192
(1) (2)
20 N/A N/A x4 x64256, 384 20 40 N/A x8 x64Dual
128, 192
(1) (2)
20 40 N/A x4 x64Quad 128, 192
(1) (2)
10 20 40 x4 x32
(1) Supported only by DAC operation.(2) Quad mode filter characteristic is applied.
Figure 31. ADC Δ Σ Modulator and Digital Filter Figure 32. DAC Δ Σ Modulator and Digital FilterCharacteristic Characteristic
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 21
Product Folder Link(s): PCM3168A PCM3168A-Q1
RESET OPERATION
VDD 0V
0.5 VCC´
(VDD=3.3V,typ)
tADCDLY2
tDACDLY2
Fade-In
ZERO
VCOMDA
(0.5 VCCDA1)´
3846 SCKI´
NormalOperation
SynchronousClocks
(VDD=2.2V,typ)
RST
InternalReset
VOUT1 to
VOUT8
±
±
DOUT1/2/3
SCKI,
BCKAD/DA,
LRCKAD/DA
tADCDLY1
tDACDLY1
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
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The PCM3168A and PCM3168A-Q1 have both an internal power-on reset circuit and an external reset circuit.The sequences for both reset circuits are illustrated in Figure 33 ,Table 7 , and Figure 34 .Figure 33 and Table 7describe the timing chart at the internal power-on reset. Initialization is triggered automatically at the point whereVDD exceeds 2.2 V typical, and the internal reset is released after 3846 SCKI clock cycles from power-on if RSTis kept high and SCKI is provided. VOUT from the DACs are forced to the VCOMDA level initially (= 0.5 ×VCCDA1) and settles at a specified level according to the rising VCC. If synchronization among SCKI,BCKAD/DA, and LRCKAD/DA is maintained, VOUT starts to output with a fade-in sequence after t
DACDLY1
fromthe internal reset release; VOUT then provides an output that corresponds to DIN after (3846 SCKI + t
DACDLY1
+t
DACDLY2
) from power-on. Meanwhile, DOUT from the ADCs begins to output with a fade-in sequence aftert
ADCDLY1
from the internal reset release; DOUT then provides output corresponding to VIN after (3846 SCKI +t
ADCDLY1
+ t
ADCDLY2
) from power-on. If the synchronization is not held, the internal reset is not released and bothoperating modes are maintained at reset and power-down states; after the synchronization forms again, both theDAC and ADC return to normal operation with the above sequences.
Figure 34 illustrates a timing chart at the external reset. RST accepts an external forced reset by RST = low, andprovides a device reset and power-down state that makes the lowest power dissipation state available in thePCM3168A and PCM3168A-Q1. If RST goes from high to low under synchronization among SCKI, BCKAD/DA,and LRCKAD/DA, the internal reset is asserted, all registers and memory are reset, and finally the PCM3168Aand PCM3168A-Q1 enter into all power-down states. At the same time, VOUT is immediately forced into theAGNDDA1 level and DOUT becomes '0'. To begin normal operation again, toggle RST high; the same power-upsequence as power-on reset shown in Figure 33 is performed.
The PCM3168A and PCM3168A-Q1 do not require particular power-on sequences for VCC and VDD; it allowsVDD on and then VCC on, or VCC on and then VDD on. From the viewpoint of the Absolute Maximum Ratings ,however, simultaneous power-on is recommended for avoiding unexpected responses on VOUTx and DOUTx.Figure 33 illustrates the response for VCC on with VDD on.
Figure 33. Power-On-Reset Timing Requirements
Table 7. Timing Requirements for Figure 33
SYMBOL DESCRIPTION SINGLE DUAL QUAD UNIT
DAC delay time internal reset release tot
DACDLY1
3600 7200 14400 Period of LRCKDAVOUT startt
DACDLY2
DAC fade-in/fade-out time 2048 4096 8192 Period of LRCKDAADC delay time internal reset release tot
ADCDLY1
4800 9600 N/A Period of LRCKADDOUT startt
ADCDLY2
ADC fade-in/fade-out time 2048 4096 N/A Period of LRCKAD
22 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): PCM3168A PCM3168A-Q1
VDD
SynchronousClocks
ZERO
Power-Down NormalOperationNormalOperation
SynchronousClocks
0V
SCKI,
BCKAD/DA,
LRCKAD/DA
RST
InternalReset
VOUT1 to
VOUT8
±
±
DOUT1/2/3
tADCDLY2
tDACDLY1
tDACDLY2
0.5 VCC´
(VDD=3.3V,typ)
3846 SCKI´
Fade-In
100ns(min)
tADCDLY1
AUDIO SERIAL PORT OPERATION
AUDIO DATA INTERFACE FORMATS AND TIMING
PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
Figure 34. External Reset Timing Requirements
The PCM3168A and PCM3168A-Q1 audio serial ports consist of 11 signals: BCKDA, BCKAD, LRCKDA,LRCKAD, DIN1, DIN2, DIN3, DIN4, DOUT1, DOUT2, and DOUT3. The PCM3168A and PCM3168A-Q1 alsosupport audio interface mode, slave mode, and master mode. The BCKAD/DA is a bit clock input at the slavemode and an output at the master mode. The LRCKAD/DA is a left/right word clock or frame synchronizationclock input at slave mode and output at master mode. The DIN1/2/3/4 are the audio data inputs for the DAC. TheDOUT1/2/3 are the audio data outputs from the ADC. BCKAD, LRCKAD and DOUT1/2/3 are used for the ADC,and BCKDA, LRCKDA and DIN1/2/3/4 are used for the DAC.
The PCM3168A and PCM3168A-Q1 support eight audio data interface formats for the ADC and DAC separatelyin both master and slave modes: 24-bit I
2
S, 24-bit left-justified, 24-bit right-justified, 16-bit right-justified, 24-bitleft-justified mode DSP, 24-bit I
2
S mode DSP, 24-bit left-justified mode TDM, and 24-bit I
2
S mode TDM format.The PCM3168A and PCM3168A-Q1 also support two audio data interface formats for the DAC and slave mode:24-bit left-justified mode high-speed TDM and 24-bit I
2
S mode high-speed TDM format. In the case of I
2
S,left-justified, and right-justified data formats, 64 BCKs, 48 BCKs, and 32 BCKs per LRCK period are supported,but 48 BCKs are limited in slave mode and 32 BCKs are limited in slave mode 16-bit right-justified only. In thecase of TDM data format in single rate, BCKAD/DA, LRCKAD/DA, DOUT1, and DIN1 are used. In the case ofTDM data format in dual rate, BCKAD/DA, LRCKAD/DA, DOUT1/2, and DIN1/2 are used. In the case ofhigh-speed TDM format in dual rate, BCKDA, LRCKDA, and DIN1 are used. In the case of high-speed TDMformat in quad rate, BCKDA, LRCKDA, and DIN1/2 are used. TDM format and high-speed TDM format aresupported only at SCKI = 512 f
S
, 256 f
S
, 128 f
S
, and f
BCK
≤f
SCKI
. The audio data formats are selected byMC/SCL/FMT in hardware control mode and registers 65 and 81 in software control mode. All data must be inbinary twos complement, MSB first.
Figure 35 through Figure 41 show 10 audio interface data formats. Table 8 summarizes the applicable formatsand describes the relationships among them and the respective restrictions with mode control.
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 23
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LRCKAD/DA
Ch1(Dx1)orCh3(Dx2)
Ch5(Dx3)orCh7(DIN4)
0
0
1
1
2
2
21
21
22
22
23
23
0
0
1
1
2
2
21
21
22
22
23
23
MSB
MSB
MSB
MSB
LSB
LSB
LSB
LSB
Ch2(Dx1)orCh4(Dx2)
Ch6(Dx3)orCh8(DIN4)
BCKAD/DA
DIN1/2/3/4
DOUT1/2/3
LRCKAD/DA
23 22 2 1 0
2 1 0
21
23 22 21
LSB
LSB
MSB
MSB
23 23
23
22 2 1 0
2 1 0
21
23 22 21
LSB
LSB
MSB
MSB
Ch2(Dx1)orCh4(Dx2)
Ch6(Dx3)orCh8(DIN4)
Ch1(Dx1)orCh3(Dx2)
Ch5(Dx3)orCh7(DIN4)
BCKAD/DA
DIN1/2/3/4
DOUT1/2/3
LRCKAD/DA
Ch2(Dx1)orCh4(Cx2)
Ch6(Dx3)orCh8(DIN4)
23 22 21 2 1 0
23 22 21 2 1 0
LSB
LSB
MSB
MSB
23 22 21 2 1 0
23 22 21 2 1 0
LSB
LSB
MSB
MSB
0
0
Ch1(Dx1)orCh3(Cx2)
Ch5(Dx3)orCh7(DIN4)
BCKAD/DA
DIN1/2/3/4
DOUT1/2/3
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
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Table 8. Audio Data Interface Formats and Sampling Rate, Bit Clock, and System Clock RestrictionsCONTROL MAX LRCKMODE FORMAT I/F MODE DATA BITS FREQUENCY (f
S
) SCKI RATE (xf
S
) BCK RATE (xf
S
) APPLICABLE PINS
24 64, 48 (slave)
(1)I
2
S/Left-Justified
64, 48 (slave)
(1)
,Right-Justified 24, 16 96 kHz (ADC) 256 to 768 (ADC) DOUT1/2/332 (slave, 16 bit)
(1)192 kHz (DAC) 128 to 768 (DAC) DIN1/2/3/4Master/SlaveI
2
S/Left-Justified
24 64DSPSoftware
control
24 48 kHz 256, 512 256 DOUT1, DIN1I
2
S/ Left-Justified
TDM
24 96 kHz 128 (DAC)
(2)
, 256 128 DOUT1/2, DIN1/2
High-Speed 24 96 kHz 256 256 DIN1Slave andI
2
S/Left-Justified
DAC Only
(3)
24 192 kHz 128 128 DIN1/2TDM
96 kHz (ADC) 256 to 768 (ADC) DOUT1/2/324 64, 48 (slave)
(1)I
2
S
192 kHz (DAC) 128 to 768 (DAC) DIN1/2/3/4Hardware Mastercontrol (ADC), Slave 24 48 kHz 512 256 DOUT1, DIN1I
2
S TDM
24 96 kHz 256 128 DOUT1/2, DIN1/2
(1) BCK = 48 f
S
, 32 f
S
is supported only in slave mode; BCK = 32 f
S
is supported only for 16-bit data length.(2) SCKI = 128 f
S
is supported only for DAC.(3) High-Speed I
2
S/Left-Justified TDM format is supported only for DAC operation in slave mode.
Figure 35. Audio Data Format: 24-Bit I
2
S
Figure 36. Audio Data Format: 24-Bit Left-Justified
Figure 37. Audio Data Format: 24-Bit Right-Justified
24 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): PCM3168A PCM3168A-Q1
LRCKAD/DA
Ch2(Dx1)orCh4(Dx2)
Ch6(Dx3)orCh8(DIN4)
0
0
BCKAD/DA
DIN1/2/3/4
DOUT1/2/3
Ch1(Dx1)orCh3(Dx2)
Ch5(Dx3)orCh7(DIN4)
15 14 13 2 1 0
MSB LSB
15 14 13 2 1 0
MSB LSB
15 14 13 2 1 0
MSB LSB
15 14 13 2 1 0
MSB LSB
1/f (64BCKs)
S
LRCKAD/DA
BCKAD/DA
I SMode
2
DIN1/2/3/4
DOUT1/2/3
Left-JustifiedMode
DIN1/2/3/4
DOUT1/2/3
Ch1(Dx1)orCh3(Dx2)
(Ch5(Dx3)orCh7(DIN4)
Ch2(Dx1)orCh4(Dx2)
(Ch6(Dx3)orCh8(DIN4)
23 22 21 2 1 0
23 22 21 2 1 0
23 22 21 2 1 0
23 22
23 22 21
23 2221 2 1 0
LRCKAD/DA
(Master)
LRCKAD/DA
(Slave)
BCKAD/DA
Left-JustifiedMode
DIN1,DOUT1
(Single)
I SMode
2
DIN1,DOUT1
(Single)
Left-JustifiedMode
DIN1/2,DOUT1/2
(Dual)
I SMode
2
DIN1/2,DOUT1/2
(Dual)
1/f (256BCKsatSingleRate,128BCKsatDualRate)
S
23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 23 220
23 22 1 0 23 22 1 0 23 22 1 0 23 22 23 221 0
23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 23 220
23 22 1 0 1 0 1 023 22 23 22 1 023 22 23 22
Ch1
32BCKs
Ch2
32BCKs
Ch3
32BCKs
Ch4
32BCKs
Ch5
32BCKs
Ch6
32BCKs
Ch7
32BCKs
Ch8
32BCKs
Ch1/Ch5
32BCKs
Ch2/Ch6
32BCKs
Ch3/Ch7
32BCKs
Ch4/Ch8
32BCKs
PCM3168A
PCM3168A-Q1
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......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
Figure 38. Audio Data Format: 16-Bit Right-Justified
Figure 39. Audio Data Format: 24-Bit DSP Format
Figure 40. Audio Data Format: 24-Bit TDM Format (SCKI = 128 f
S
, 256 f
S
, and 512 f
S
Only)
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 25
Product Folder Link(s): PCM3168A PCM3168A-Q1
LRCKDA
(Slave)
BCKDA
Left-JustifiedMode
DIN1
(Dual)
I SMode
2
DIN1
(Dual)
Left-JustifiedMode
DIN1/2
(Quad)
I SMode
2
DIN1/2
(Quad)
1/f (256BCKsatDualRate,128BCKsatQuadRate)
S
23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 23 220
23 22 1 0 23 22 1 0 23 22 1 0 23 22 23 221 0
23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 23 220
23 22 1 0 1 0 1 023 22 23 22 1 023 22 23 22
Ch1
32BCKs
Ch2
32BCKs
Ch3
32BCKs
Ch4
32BCKs
Ch5
32BCKs
Ch6
32BCKs
Ch7
32BCKs
Ch8
32BCKs
Ch1/Ch5
32BCKs
Ch2/Ch6
32BCKs
Ch3/Ch7
32BCKs
Ch4/Ch8
32BCKs
AUDIO INTERFACE TIMING
BCKAD/DA
(Input) 1.4V
1.4V
1.4V
0.5 VDD´
tLRS
tDOD
LRCKAD/DA
(Input)
DOUT1/2/3
DIN1/2/3/4
tDIH
tLRH
tDIS
tBCH tBCL
tBCY
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
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Figure 41. Audio Data Format: 24-Bit High-Speed TDM Format(SCKI = 128 f
S
, 256 f
S
, DAC, and Slave Mode Only)
Figure 42 through Figure 45 describe the detailed interface timing specifications.
Figure 42. Audio Interface Timing Requirements for Left-Justified, Right-Justified, and I
2
S Data Formats(Slave Mode)
Table 9. Timing Requirements for Figure 42
(1)
SYMBOL DESCRIPTION MIN TYP MAX UNIT
t
BCY
BCKAD/DA cycle time 75 nst
BCH
BCKAD/DA pulse width high 35 nst
BCL
BCKAD/DA pulse width low 35 nst
LRS
LRCKAD/DA setup time to BCKAD/DA rising edge 10 nst
LRH
LRCKAD/DA hold time to BCKAD/DA rising edge 10 nst
DIS
DIN1/2/3/4 setup time to BCKDA rising edge 10 nst
DIH
DIN1/2/3/4 hold time to BCKDA rising edge 10 nst
DOD
DOUT1/2/3 delay time from BCKAD falling edge 0 30 ns
(1) Load capacitance of output is 20 pF.
26 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): PCM3168A PCM3168A-Q1
BCKAD/DA
(Output)
tLRD
tDOD
0.5 VDD´
0.5 VDD´
0.5 VDD´
1.4V
LRCKAD/DA
(Output)
DOUT1/2/3
DIN1/2/3/4
tBCH tBCL
tBCY
tDIS tDIH
tDOD
tLRS
1.4V
1.4V
0.5 VDD´
1.4V
BCKAD/DA
(Input)
LRCKAD/DA
(Input)
DOUT1/2/3
DIN1/2/3/4
tBCH tBCL
tBCY tLRH
tDIS tDIH
tLRW
PCM3168A
PCM3168A-Q1
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......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
Figure 43. Audio Interface Timing Requirements for Left-Justified, Right-Justified, and I
2
S Data Formats(Master Mode)
Timing Requirements for Figure 43
(1)
SYMBOL DESCRIPTION MIN TYP MAX UNIT
t
BCY
BCKAD/DA cycle time 1/(64 f
S
)t
BCH
BCKAD/DA pulse width high 0.4 t
BCY
0.5 t
BCY
0.6 t
BCY
t
BCL
BCKAD/DA pulse width low 0.4 t
BCY
0.5 t
BCY
0.6 t
BCY
t
LRD
LRCKAD/DA delay time from BCKAD/DA falling edge – 10 20 nst
DIS
DIN1/2/3/4 setup time to BCKDA rising edge 10 nst
DIH
DIN1/2/3/4 hold time to BCKDA rising edge 10 nst
DOD
DOUT1/2/3 delay time from BCKAD falling edge – 10 20 ns
(1) Load capacitance of output is 20 pF.
Figure 44. Audio Interface Timing Requirements for DSP and TDM Data Formats (Slave Mode)
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 27
Product Folder Link(s): PCM3168A PCM3168A-Q1
BCKAD/DA
(Output)
LRCKAD/DA
(Output)
DOUT1/2/3
DIN1/2/3/4
tDOD
tLRD
1.4V
0.5 VDD´
0.5 VDD´
0.5 VDD´
tBCH tBCL
tBCY
tDIS tDIH
tLRW
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
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Timing Requirements for Figure 44
(1)
SYMBOL DESCRIPTION MIN TYP MAX UNIT
BCKAD cycle time 75 nst
BCY
BCKDA cycle time 40 nsBCKAD pulse width high 35 nst
BCH
BCKDA pulse width high 15 nsBCKAD pulse width low 35 nst
BCL
BCKDA pulse width low 15 nsLRCKAD/DA pulse width high (DSP format) t
BCYt
LRW
LRCKAD/DA pulse width high (TDM format) t
BCY
1/f
S
– t
BCY
t
LRS
LRCKAD/DA setup time to BCKAD/DA rising edge 10 nst
LRH
LRCKAD/DA hold time to BCKAD/DA rising edge 10 nst
DIS
DIN1/2/3/4 setup time to BCKDA rising edge 10 nst
DIH
DIN1/2/3/4 hold time to BCKDA rising edge 10 nst
DOD
DOUT1/2/3 delay time from BCKAD falling edge 0 30 ns
(1) Load capacitance of output is 20 pF.
Figure 45. Audio Interface Timing Requirements for DSP and TDM Data Formats (Master Mode)
Timing Requirements for Figure 45
(1)
SYMBOL DESCRIPTION MIN TYP MAX UNIT
BCKAD/DA cycle time (DSP format) 1/(64 f
S
)t
BCY
BCKAD/DA cycle time (TDM format, single rate) 1/(256 f
S
)BCKAD/DA cycle time (TDM format, dual rate) 1/(128 f
S
)t
BCH
BCKAD/DA pulse width high 0.4 t
BCY
0.5 t
BCY
0.6 t
BCY
t
BCL
BCKAD/DA pulse width low 0.4 t
BCY
0.5 t
BCY
0.6 t
BCY
LRCKAD/DA pulse width high (DSP format) t
BCYt
LRW
LRCKAD/DA pulse width high (TDM format) 1/(2 f
S
)t
LRD
LRCKAD/DA delay time from BCKAD/DA falling edge – 10 20 nst
DIS
DIN1/2/3/4 setup time to BCKDA rising edge 10 nst
DIH
DIN1/2/3/4 hold time to BCKDA rising edge 10 nst
DOD
DOUT1/2/3 delay time from BCKAD falling edge – 10 20 ns
(1) Load capacitance of output is 20 pF.
28 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): PCM3168A PCM3168A-Q1
SYNCHRONIZATION WITH THE DIGITAL AUDIO SYSTEM
Stateof
Synchronization Synchronous
Normal
Normal ZERO
Normal
Normal
Synchronous
Asynchronous
DAC
VOUTX±
ADC
DOUTX
VCOMDA
(0.5VCCDA1)
Within1/fS
tADCDLY3
tDACDLY3
UndefinedData
UndefinedData
HIGH-PASS FILTER (HPF)
PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
The PCM3168A and PCM3168A-Q1 operate under the system clock (SCKI) and the audio sampling rate(LRCKAD/DA). Therefore, SCKI and LRCKAD/DA must have a specific relationship in slave mode. ThePCM3168A and PCM3168A-Q1 do not need a specific phase relationship between the audio interface clocks(LRCKAD/DA, BCKAD/DA) and the system clock (SCKI), but does require a specific frequency relationship(ratiometric) between LRCKAD/DA, BCKAD/DA, and SCKI.
If the relationship between SCKI and LRCKDA changes more than ± 2 BCKDA clocks because of jitter, samplingfrequency change, etc., the DAC internal operation halts within 1/f
S
, and the analog output is forced intoVCOMDA (0.5 VCCDA1) until re-synchronization between SCKI, LRCKDA, and BCKDA is completed and thent
DACDLY3
passes. If the relationship between SCKI and LRCKAD changes more than ± 2 BCKADs because ofjitter, sampling frequency change, etc., the ADC internal operation halts within 1/f
S
, and the digital output isforced into a '0' code until re-synchronization between SCKI, LRCKAD, and BCKAD is completed and thent
ADCDLY3
passes. In the event the change is less than ± 2 BCKAD/DAs, re-synchronization does not occur, andthis analog/digital output control and discontinuity do not occur.
Figure 46 shows the DAC analog output and ADC digital output for loss of synchronization. During undefineddata periods, some noise may be generated in the audio signal. Also, the transition of normal to undefined dataand undefined (or zero) data to normal data creates a discontinuity of data on the analog and digital outputs,which then may generate some noise in the audio signal.
Both ADC outputs (DOUTx) and DAC outputs (VOUTx) hold the previous state if the system clock halts, but theasynchronous and re-synchronization processes would occur after the system clock resumes. Figure 46 showsDAC outputs and ADC outputs for loss of synchronization.
Figure 46. DAC Outputs and ADC Outputs for Loss of Synchronization
Timing Requirements for Figure 46
SYMBOL DESCRIPTION SINGLE DUAL QUAD UNIT
Period oft
DACDLY3
DAC delay synchronization detect to normal data 38 38 29
LRCKDA
Period oft
ADCDLY3
ADC delay synchronization detect to normal data 60 60 N/A
LRCKAD
The PCM3168A and PCM3168A-Q1 include a high-pass filter (HPF) for all ADC channels in order to remove thedc component of the digitized input signal. The filter is located at the output of the digital decimation filter. The – 3dB corner frequency for the HPF scales with the output sampling rate, where f
– 3 dB
= 0.020 × f
S
/1000. When f
S
=48 kHz, f
– 3 dB
is 0.96 Hz. The HPF function can be disabled (bypassed) by the BYP bits in two channels.
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OVERFLOW FLAG
ZERO FLAG
MODE CONTROL
HARDWARE CONTROL MODE CONFIGURATION
PCM3168A
PCM3168A-Q1
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The PCM3168A and PCM3168A-Q1 include an overflow flag output for all ADC channels. As soon as any of thesix-channel ADC digital outputs exceed the full-scale range, an overflow flag is forced high on the OVF pin. Theoverflow flag is held high for 1024 LRCKAD clock cycles. In parallel, overflow flag information is stored in theOVF bits of the mode control register, and the OVF bit is held until the mode control register is read. Theoverflow flag polarity can be changed by the OVFP bit. The OVF pin also indicates internal reset completion bytransmitting a 4096 SCKI width pulse.
The PCM3168A and PCM3168A-Q1 include a zero flag output for all DAC channels. When all of theeight-channel DACs digital inputs have continued as zero data for 1024 LRCKDA clock cycles, the zero flag isforced high on ZERO. In parallel, zero flag information is stored in the ZERO bits according to channel. The zeroflag polarity can be changed by the ZREV bit. Also, the zero flag function can be selected by the AZRO bits.AND or OR logic for stereo, six channels, and eight channels can be selected.
The PCM3168A and PCM3168A-Q1 include four-way mode control selectable by MODE pin, as shown inTable 10 . The pull-up and pull-down resistors must be 220 k Ω± 5%. This mode control selection is sampled onlywhen the internal reset is released by a power-on reset or by a low-to-high transition of the external reset (RSTpin); a system clock is also required.
Table 10. Mode Control Selection
MODE MODE CONTROL INTERFACE
Tied to DGND Two-wire (I
2
C) serial control, selectable analog input configurationTied to DGND via pull-down resistor H/W (hardware control), differential analog inputTied to VDD via pull-up resistor H/W (hardware control), single-ended analog inputTied to VDD Four-wire (SPI) serial control, selectable analog input configuration
From the mode control selection described in Table 10 , the functions of four pins are changed, as shown inTable 11 .
Table 11. Pin Functions
PIN ASSIGNMENTS
PIN SPI I
2
C H/W
MS/ADR0/MD0 MS ADR0 MD0MDO/ADR1/MD1 MDO ADR1 MD1MDI/SDA/DEMP MDI SDA DEMPMC/SCL/FMT MC SCL FMT
Both serial controls are available while RST = high and after internal reset completion, which is indicated as anegative transition (high ≥low) of a 4096 × SCKI width pulse on the OVF pin.
The data format is selected by the MC/SCL/FMT pin between I
2
S format and I
2
S mode in TDM format, as shownin Table 12 .
Table 12. Data Format Selection
FMT MODE CONTROL INTERFACE
Low I
2
S audio data formatHigh I
2
S mode, TDM audio data format (supported only for SCKI = 128 f
S
, 256 f
S
, or 512 f
S
)
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FOUR-WIRE (SPI) SERIAL CONTROL
CONTROL DATA WORD FORMAT
ADR6
R/W
RegisterAddress RegisterData
ADR5 ADR4 ADR3 ADR2 ADR1 ADR0 D7 D6 D5 D4 D3 D2 D1 D0
MSB LSB
PCM3168A
PCM3168A-Q1
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The de-emphasis filter is enabled by the MDI/SDA/DEMP pin. The de-emphasis frequency is fixed at 44.1 kHz inhardware control mode, as shown in Table 13 . The software mode provides full selections of 32 kHz, 44.1 kHz,and 48 kHz.
Table 13. Hardware Control Mode
DEMP (DE-EMPHASIS FILTER ENABLE) DESCRIPTION
Low 44.1 kHz, de-emphasis disabledHigh 44.1 kHz, de-emphasis enabled
The audio interface and the sampling mode are selected by the MS/ADR0/MD0 and MDO/ADR1/MD1 pins. Theselectable multiple of the master mode audio interface is limited between 256 f
S
, 384 f
S
, and 512 f
S
; theselectable sampling mode is limited as shown in Table 14 . The software mode provides full selections.
Table 14. Selectable Sampling Mode
DESCRIPTION
INTERFACE MODE SAMPLING MODE
MD1 MD0 ADC DAC ADC DAC
Low Low Slave
(1)
Slave
(1)
Auto
(2)
Auto
(2)
Low High Master, 512 f
S
Slave
(1)
Single rate Auto
(2)
High Low Master, 384 f
S
Slave
(1)
Dual rate Auto
(2)
High High Master, 256 f
S
Slave
(1)
Dual rate Auto
(2)
(1) The multiples between system clock and sampling frequency are automatically detected; 256 f
S
, 384 f
S
, 512 f
S
, and 768 f
S
areacceptable for ADC operation, and 128 f
S
, 192 f
S
, 256 f
S
, 384 f
S
, 512 f
S
, and 768 f
S
are acceptable for DAC operation.(2) The sampling mode is automatically set as single rate for 512 f
S
and 768 f
S
, dual rate for 256 f
S
and 384 f
S
, and quad rate for 128 f
S
and198 f
S
, according to the detected multiples between the system clock and sampling clock.
The PCM3168A and PCM3168A-Q1 include an SPI-compatible serial port that operates asynchronously with theaudio serial interface. The control interface consists of MDI/SDA/DEMP, MDO/ADR1/MD1, MC/SCL/FMT, andMS/ADR0/MD0. MDI is the serial data input to program the mode control registers. MDO is the serial data outputto read back register settings and some flags. MDO is inactive (Hi-Z, high impedance) during MS = high. MC isthe serial bit clock that shifts the data into the control port. MS is the select input to enable the mode control port.
All single write/read operations via the serial control port use 16-bit data words. Figure 47 shows the control dataword format. The first bit is for read/write controls; '0' indicates a write operation and '1' indicates a readoperation. Following the first bit are seven other bits, labeled ADR[6:0] that set the register address for thewrite/read operation. The eight least significant bits (LSBs), D[7:0] on MDI or MDO, contain the data to be writtento the register specified by ADR[6:0], or the data read from the register specified by ADR[6:0].
Figure 47. Control Data Word Format for MDI
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REGISTER WRITE OPERATION
MS
MC
MDI X(1) '0'
ADR6 ADR5 ADR4 ADR3 ADR2 ADR1 ADR0
D7 D6 D5 D4 D3 D2 D1 D0 X X R/W
ADR6
REGISTER READ OPERATION
MS
MC
MDI X(1) '1'
ADR6 ADR5 ADR4 ADR3 ADR2 ADR1 ADR0
Don'tCare(X) R/W
ADR6
MDO Hi-Z Hi-ZD7 D6 D5 D4 D3 D2 D1 D0
PCM3168A
PCM3168A-Q1
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Figure 48 shows the functional timing diagram for single write operations on the serial control port. MS is held ata high state until a register must be written. To start the register write cycle, MS is set to a low state. 16 clocksare then provided on MC, corresponding to the 16 bits of the control data word on MDI. After the 16th clock cyclehas been completed, MS is set high to latch the data into the indexed mode control register.
Also, the PCM3168A and PCM3168A-Q1 support multiple write operations in addition to single write operations,which can be performed by sending the following N-times of the 8-bit register data after the first 16-bit registeraddress and register data while keeping the MC clocks and MS at a low state. Closing a multiple write operationcan be accomplished by setting MS to a high state.
(1) X = Don't care.
Figure 48. Register Write Operation
Figure 49 shows the functional timing diagram for single read operations on the serial control port. MS is held ata high state until a register must be read. To start the register read cycle, MS is set to a low state. 16 clocks arethen provided on MC, corresponding to the first eight bits of the control data word on MDI and the second eightbits of the read-back data word from MDO. After the 16th clock cycle has been completed, MS is held high forthe next write or read operation. MDO remains in a high impedance state except during the eight MC clockperiods of the actual data transfer.
(1) X = Don't care.
Figure 49. Register Read Operation
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TIMING CHARACTERISTICS: FOUR-WIRE
MS 1.4V
1.4V
1.4V
0.5 ´VDD
tMSH
tMDD
tMDR
LSB(D0)
LSB(D0)
Hi-Z
tMSS tMCH tMCL
tMDD
tMDS
ADR0
MSB(R/ )W
MSB(D7)
Hi-Z
MC
MDI
MDO
tMDH
tMCY
tMHH
MSB(D7)
TWO-WIRE (I
2
C) SERIAL CONTROL
MSB LSB
10 0 0 1ADR1 ADR0 R/W
PCM3168A
PCM3168A-Q1
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......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
(1) These timing parameters are critical for proper control port operation.
Figure 50. Four-Wire Serial Control Interface Timing
(1)
Timing Requirements for Figure 50
(1)
PCM3168A, PCM3168A-Q1
SYMBOL PARAMETER MIN MAX UNIT
t
MCY
MC pulse cycle time 100 nst
MCL
MC low-level time 40 nst
MCH
MC high-level time 40 nst
MHH
MS high-level time t
MCY
nst
MSS
MS falling edge to MC rising edge 30 nst
MSH
MS rising edge from MC rising edge for LSB 15 nst
MDH
MDI hold time 15 nst
MDS
MDI setup time 15 nst
MDD
MDO enable or delay time from MC falling edge 0 30 nst
MDR
MDO disable time from MS rising edge 0 30 ns
(1) These timing parameters are critical for proper control port operation.
The PCM3168A and PCM3168A-Q1 support an I
2
C-compatible serial bus and data transmission protocol for fastmode configured as a slave device. This protocol is explained in the I
2
C specification, version 2.0.
The PCM3168A and PCM3168A-Q1 have a 7-bit slave address, as shown in Figure 51 . The first five bits are themost significant bits (MSB) of the slave address and are factory-preset to 10001. The next two bits of theaddress byte are selectable bits that can be set by MS/ADR0/MD0 and MDO/ADR1/MD1. A maximum of fourPCM3168A and PCM3168A-Q1s can be connected on the same bus at any one time. Each PCM3168A andPCM3168A-Q1 respond when it receives its own slave address.
Figure 51. Slave Address
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PACKET PROTOCOL
SDA
SCL
SlaveAddress R/W(1) ACK(2) DATA(3) ACK DATA ACK
1to7 8 9 1to8 9 1to8 9
ACK
9
St
Start
Condition
Sp
Stop
Condition
WRITE OPERATION
Transmitter
DataType St
M
SlaveAddress
M
W
M
ACK
S
RegAddress
M
ACK
S
WriteData1
M
ACK
S
WriteData2
M
ACK
S
ACK
S
Sp
M
READ OPERATION
Transmitter M
St
M
SlaveAddress
M
W
S
ACK
M
RegAddress
S
ACK
M
Sr
M
SlaveAddress
M
R
S
ACK
S
ReadData
M
NACK
M
Sp
DataType
PCM3168A
PCM3168A-Q1
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A master device must control the packet protocol, which consists of the start condition, slave address with theread/write bit, data if a write operation is required, acknowledgement if a read operation is required, and stopcondition. The PCM3168A and PCM3168A-Q1 support both slave receiver and transmitter functions. Detailsabout DATA for both write and read operations are described in Figure 52 .
(1) R/ W: Read operation if '1'; write operation otherwise.(2) ACK: Acknowledgement of a byte if '0', not Acknowledgement of a byite if '1'.(3) DATA: Eight bits (byte); details are described in the Write Operation and Read Operation sections.
Figure 52. DATA Operation
The PCM3168A and PCM3168A-Q1 support a receiver function. A master device can write to any PCM3168Aand PCM3168A-Q1 register using single or multiple accesses. The master sends a PCM3168A andPCM3168A-Q1 slave address with a write bit, a register address, and the data. If multiple access is required, theaddress is that of the starting register, followed by the data to be transferred. When the data are receivedproperly, the index register is incremented by one automatically. When the index register reaches & h5E, the nextvalue is & h40. When undefined registers are accessed, the PCM3168A and PCM3168A-Q1 do not send anacknowledgement. Figure 53 illustrates a diagram of the write operation. The register address and write data arein 8-bit, MSB-first format.
(1) M = Master device, S = Slave device, St = Start condition, W = Write, ACK = Acknowledge, and Sp = Stop condition.
Figure 53. Framework for Write Operation
A master device can read the registers from & h40 to & h5E of the PCM3168A and PCM3168A-Q1. The value ofthe register address is stored in an indirect index register in advance. The master sends the PCM3168A andPCM3168A-Q1 slave address with a read bit after storing the register address. Then the PCM3168A andPCM3168A-Q1 transfer the data that the index register points to. Figure 54 shows a diagram of the readoperation.
(1) M = Master device, S = Slave device, St = Start condition, Sr = Repeated start condition, W = Write, R = Read, ACK = Acknowledge,NACK = Not acknowledge, and Sp = Stop condition.NOTE: The slave address after the repeated start condition must be the same as the previous address.
Figure 54. Framework for Read Operation
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TIMING REQUIREMENTS: SCL AND SDA
tBUF tD-SU
tD-HD tSDA-R
tSDA-F
tP-SU
tSCL-F
tS-HD
tLOW
tSCL-R
tHI tS-SU
tS-HD
START
Repeated
START STOP
SDA
SCL
PCM3168A
PCM3168A-Q1
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......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
Figure 55. SCL and SDA Control Interface Timing
Timing Requirements for Figure 55
PCM3168A, PCM3168A-Q1
STANDARD MODE FAST MODE
SYMBOL PARAMETER MIN MAX MIN MAX UNIT
f
SCL
SCL clock frequency 100 400 kHz
t
BUF
Bus free time between STOP and START condition 4.7 1.3 µs
t
LOW
Low period of the SCL clock 4.7 1.3 µs
t
HI
High period of the SCL clock 4.0 0.6 µs
t
S-SU
Setup time for START/Repeated START condition 4.7 0.6 µs
t
S-HD
Hold time for START/Repeated START condition 4.0 0.6 µs
t
D-SU
Data setup time 250 100 ns
t
D-HD
Data hold time 0 3450 0 900 ns
t
SCL-R
Rise time of SCL signal 1000 20 + 0.1 C
B
300 ns
t
SCL-F
Fall time of SCL signal 1000 20 + 0.1 C
B
300 ns
t
SDA-R
Rise time of SDA signal 1000 20 + 0.1 C
B
300 ns
t
SDA-F
Fall time of SDA signal 1000 20 + 0.1 C
B
300 ns
t
P-SU
Setup time for STOP condition 4.0 0.6 µs
t
GW
Allowable glitch width N/A 50
C
B
Capacitive load for SDA and SCL line 400 100 pF
Noise margin at high level for each connected deviceV
NH
0.2 × VDD 0.2 × VDD V(including hysteresis)
Noise margin at low level for each connected deviceV
NL
0.1 × VDD 0.1 × VDD V(including hysteresis)
V
HYS
Hysteresis of Schmitt-trigger input N/A 0.05 × VDD V
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CONTROL REGISTER DEFINITIONS (SOFTWARE MODE ONLY)
PCM3168A
PCM3168A-Q1
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The PCM3168A and PCM3168A-Q1 have many user-programmable functions that are accessed via controlregisters, and are programmed through the SPI or I
2
C serial control port. Table 15 shows the available modecontrol functions along with reset default conditions and associated register address. Table 16 lists the registermap.
Table 15. User-Programmable Mode Control Functions
FUNCTION RESET DEFAULT REGISTER LABEL
Mode control register reset for ADC and DAC operation Normal operation 64 MRSTSystem reset for ADC and DAC operation Normal operation 64 SRSTDAC sampling mode selection Auto 64 SRDA[1:0]DAC power-save mode selection Power save 65 PSMDADAC master/slave mode selection Slave 65 MSDA[2:0]DAC audio interface format selection I
2
S 65 FMTDA[3:0]DAC operation control Normal operation 66 OPEDA[3:0]DAC digital filter roll-off control Sharp roll-off 66 FLT[3:0]DAC output phase selection Normal 67 REVDA[8:1]DAC soft mute control Mute disabled 68 MUTDA[8:1]DAC zero flag Not detected 69 ZERO[8:1]DAC digital attenuation mode Channel independent 70 ATMDDADAC digital attenuation speed N × 2048/f
S
70 ATSPDADAC digital de-emphasis function control Disabled 70 DEMP[1:0]DAC zero flag function selection Independent 70 AZRO[2:0]DAC zero flag polarity selection High for detection 70 ZREVDAC digital attenuation level shifting 0 dB, no attenuation 71 – 79 ATDAx[7:0]ADC sampling mode selection Auto 80 SRAD[1:0]ADC master/slave mode selection Slave 81 MSAD[2:0]ADC audio interface format selection I
2
S 81 FMTAD[2:0]ADC power-save control Normal operation 82 PSVAD[2:0]ADC HPF bypass control Normal output, HPF enabled 82 BYP[2:0]ADC input configuration control Differential 83 SEAD[6:1]ADC input phase selection Normal 84 REVAD[6:1]ADC soft mute control Mute disabled 85 MUTAD[6:1]ADC overflow flag Not detected 86 OVF[6:1]ADC digital attenuation mode Channel independent 87 ATMDADADC digital attenuation speed N × 2048/f
S
87 ATSPADADC overflow flag polarity selection High for detection 87 OVFPADC digital attenuation level setting 0 dB, no gain or attenuation 88 – 94 ATADx[7:0]
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Table 16. Register Map
ADDRESS DATA
DAC HEX B7 B6 B5 B4 B3 B2 B1 B0
64 40 MRST SRST — — — — SRDA1 SRDA065 41 PSMDA MSDA2 MSDA1 MSDA0 FMTDA3 FMTDA2 FMTDA1 FMTDA066 42 OPEDA3 OPEDA2 OPEDA1 OPEDA0 FLT3 FLT2 FLT1 FLT067 43 REVDA8 REVDA7 REVDA6 REVDA5 REVDA4 REVDA3 REVDA2 REVDA168 44 MUTDA8 MUTDA7 MUTDA6 MUTDA5 MUTDA4 MUTDA3 MUTDA2 MUTDA169 45 ZERO8 ZERO7 ZERO6 ZERO5 ZERO4 ZERO3 ZERO2 ZERO170 46 ATMDDA ATSPDA DEMP1 DEMP0 AZRO2 AZRO1 AZRO0 ZREV71 47 ATDA07 ATDA06 ATDA05 ATDA04 ATDA03 ATDA02 ATDA01 ATDA0072 48 ATDA17 ATDA16 ATDA15 ATDA14 ATDA13 ATDA12 ATDA11 ATDA1073 49 ATDA27 ATDA26 ATDA25 ATDA24 ATDA23 ATDA22 ATDA21 ATDA2074 4A ATDA37 ATDA36 ATDA35 ATDA34 ATDA33 ATDA32 ATDA31 ATDA3075 4B ATDA47 ATDA46 ATDA45 ATDA44 ATDA43 ATDA42 ATDA41 ATDA4076 4C ATDA57 ATDA56 ATDA55 ATDA54 ATDA53 ATDA52 ATDA51 ATDA5077 4D ATDA67 ATDA66 ATDA65 ATDA64 ATDA63 ATDA62 ATDA61 ATDA6078 4E ATDA77 ATDA76 ATDA75 ATDA74 ATDA73 ATDA72 ATDA71 ATDA7079 4F ATDA87 ATDA86 ATDA85 ATDA84 ATDA83 ATDA82 ATDA81 ATDA8080 50 — — — — — — SRAD1 SRAD081 51 — MSAD2 MSAD1 MSAD0 — FMTAD2 FMTAD1 FMTAD082 52 — PSVAD2 PSVAD1 PSVAD0 — BYP2 BYP1 BYP083 53 — — SEAD6 SEAD5 SEAD4 SEAD3 SEAD2 SEAD184 54 — — REVAD6 REVAD5 REVAD4 REVAD3 REVAD2 REVAD185 55 — — MUTAD6 MUTAD5 MUTAD4 MUTAD3 MUTAD2 MUTAD186 56 — — OVF6 OVF5 OVF4 OVF3 OVF2 OVF187 57 ATMDAD ATSPAD — — — — — OVFP88 58 ATAD07 ATAD06 ATAD05 ATAD04 ATAD03 ATAD02 ATAD01 ATAD0089 59 ATAD17 ATAD16 ATAD15 ATAD14 ATAD13 ATAD12 ATAD11 ATAD1090 5A ATAD27 ATAD26 ATAD25 ATAD24 ATAD23 ATAD22 ATAD21 ATAD2091 5B ATAD37 ATAD36 ATAD35 ATAD34 ATAD33 ATAD32 ATAD31 ATAD3092 5C ATAD47 ATAD46 ATAD45 ATAD44 ATAD43 ATAD42 ATAD41 ATAD4093 5D ATAD57 ATAD56 ATAD55 ATAD54 ATAD53 ATAD52 ATAD51 ATAD5094 5E ATAD67 ATAD66 ATAD65 ATAD64 ATAD63 ATAD62 ATAD61 ATAD60
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REGISTER DEFINITIONS
PCM3168A
PCM3168A-Q1
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DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
64 40 MRST SRST — — — — SRDA1 SRDA0
MRST Mode control register reset for the ADC and DACThis bit sets the mode control register reset to the default value. Pop-noise may be generated.Returning the MRST bit to '1' is unneccesary, because it is automatically set to '1' after the modecontrol register is reset.Default value = 1.MRST Mode control register reset0 Set default value1 Normal operation (default)
SRST System reset for the ADC and DACThis bit controls system reset, the relation between system clock and sampling clockre-synchronization, and ADC operation and DAC operation restart. The mode control register isnot reset and the PCM3168A and PCM3168A-Q1 do not go into a power-down state. The fade-insequence is supported in the resume process, but pop-noise may be generated. Returning theSRST bit to '1' is unneccesary; it is automatically set to '1' after triggering a system reset.Default value = 1.SRST System reset0 Resynchronization
1 Normal operation (default)
SRDA[1:0] DAC Sampling mode selectThese bits control the sampling mode of DAC operation. In Auto mode, the sampling mode isautomatically set according to multiples between the system clock and sampling clock, single ratefor 512 f
S
and 768 f
S
, dual rate for 256 f
S
or 384 f
S
, and quad rate for 128 f
S
and 192 f
S
.Default value = 00.SRDA DAC Sampling mode select00 Auto (default)01 Single rate10 Dual rate11 Quad rate
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PCM3168A-Q1
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DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
65 41 PSMDA MSDA2 MSDA1 MSDA0 FMTDA3 FMTDA2 FMTDA1 FMTDA0
PSMDA DAC Power-save mode selectThis bit selects the power-save mode for the OPEDA[3:0] function. OPEDA[3:0] is the control ofpower-save mode and normal operation for PSMDA = 0, or OPEDA[3:0] works as the control ofDAC disable (not power-save mode) and normal operation for PSMDA = 1.Default value: 0.PSMDA DAC Power-save mode select0 Power-save enable mode (default)1 Power-save disable mode
MSDA[2:0] DAC Master/slave mode selectThese bits control the audio interface mode for DAC operation.Default value: 000 (slave mode).MSDA DAC Master/slave mode select000 Slave mode (default)001 Master mode, 768 f
S
010 Master mode, 512 f
S
011 Master mode, 384 f
S
100 Master mode, 256 f
S
101 Master mode, 192 f
S
110 Master mode, 128 f
S
111 Reserved
FMTDA[3:0] DAC Audio interface format selectThese bits control the audio interface format for DAC operation. Details of the format, and anyrelated restrictions with the system clock and master/slave mode, are described in the AudioData Interface Formats and Timing section.Default value: 0000 (24-bit I
2
S format).FMTDA DAC Audio interface format select0000 24-bit I
2
S format (default)0001 24-bit left-justified format0010 24-bit right-justified format0011 16-bit right-justified format0100 24-bit I
2
S mode DSP format0101 24-bit left-justified mode DSP format0110 24-bit I
2
S mode TDM format0111 24-bit left-justified mode TDM format1000 24-bit high-speed I
2
S mode TDM format1001 24-bit high-speed left-justified mode TDM format101x Reserved11xx Reserved
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PCM3168A
PCM3168A-Q1
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DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
66 42 OPEDA3 OPEDA2 OPEDA1 OPEDA0 FLT3 FLT2 FLT1 FLT0
OPEDA[3:0] DAC Operation controlThese bits control the DAC operation mode. In operation disable mode, the DAC output is cut offfrom DIN with a fade-out sequence, and the internal DAC data is reset. DAC output is forced intoVCOMDA if PSMDA = 1, or DAC output is forced into AGNDDA and goes into a power-downstate if PSMDA = 0. For normal operating mode, a fade-in sequence is applied on the DACoutput in resume process. The serial mode control is effective during operation disable mode. Await time greater than t
DACDLY2
is required for the status change because of power-save controlturning on/off.Default value: 0000.OPEDA DAC Operation controlxxx0 DAC1/2 normal operationxxx1 DAC1/2 operation disable with or without power savexx0x DAC3/4 normal operationxx1x DAC3/4 operation disable with or without power savex0xx DAC5/6 normal operationx1xx DAC5/6 operation disable with or without power save0xxx DAC7/8 normal operation1xxx DAC7/8 operation disable with or without power save
FLT[3:0] DAC Digital filter roll-off controlThe FLT[3:0] bits allow users to select the digital filter roll-off that is best suited to theirapplications. Sharp and Slow filter roll-off selections are available. The filter responses for theseselections are shown in the Typical Characteristics section of this data sheet.Default value: 0000.FLT DAC Digital filter roll-off controlxxx0 DAC1/2 sharp roll-offxxx1 DAC1/2 slow roll-offxx0x DAC3/4 sharp roll-offxx1x DAC3/4 slow roll-offx0xx DAC5/6 sharp roll-offx1xx DAC5/6 slow roll-off0xxx DAC7/8 sharp roll-off1xxx DAC7/8 slow roll-off
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DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
67 43 REVDA8 REVDA7 REVDA6 REVDA5 REVDA4 REVDA3 REVDA2 REVDA1
REVDA[8:1] DAC Output phase selectThe REVDA[8:1] bits are used to control the phase of DAC analog signal outputs.Default value: 0000 0000.REVDA DAC Output phase selectxxxx xxx0 DAC1 normal outputxxxx xxx1 DAC1 inverted outputxxxx xx0x DAC2 normal outputxxxx xx1x DAC2 inverted outputxxxx x0xx DAC3 normal outputxxxx x1xx DAC3 inverted outputxxxx 0xxx DAC4 normal outputxxxx 1xxx DAC4 inverted outputxxx0 xxxx DAC5 normal outputxxx1 xxxx DAC5 inverted outputxx0x xxxx DAC6 normal outputxx1x xxxx DAC6 inverted outputx0xx xxxx DAC7 normal outputx1xx xxxx DAC7 inverted output0xxx xxxx DAC8 normal output1xxx xxxx DAC8 inverted output
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DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
68 44 MUTDA8 MUTDA7 MUTDA6 MUTDA5 MUTDA4 MUTDA3 MUTDA2 MUTDA1
MUTDA[8:1] DAC Soft Mute controlThese bits are used to enable or disable the Soft Mute function for the corresponding DACoutputs, VOUT. The Soft Mute function is incorporated into the digital attenuators.When Mute is disabled (MUTDA[8:1] = 0), the attenuator and DAC operate normally. When Muteis enabled by setting MUTDA[8:1] = 1, the digital attenuator for the corresponding outputdecreases from the current setting to infinite attenuation with an s-curve response and time setby ATSPDA.
By setting MUTDA[8:1] = 0, the attenuator increases to the last attenuation level with s-curveresponse in the same manner as it is for decreasing levels. This configuration provides pop andzipper noise-free muting of the DAC output.The Soft Mute control uses the same digital attenuation level resource setting as the DAC. Mutecontrol has priority over the digital attenuation level setting.Default value: 0000 0000.MUTDA DAC Soft Mute controlxxxx xxx0 DAC1 Mute disabledxxxx xxx1 DAC1 Mute enabledxxxx xx0x DAC2 Mute disabledxxxx xx1x DAC2 Mute enabledxxxx x0xx DAC3 Mute disabledxxxx x1xx DAC3 Mute enabledxxxx 0xxx DAC4 Mute disabledxxxx 1xxx DAC4 Mute enabledxxx0 xxxx DAC5 Mute disabledxxx1 xxxx DAC5 Mute enabledxx0x xxxx DAC6 Mute disabledxx1x xxxx DAC6 Mute enabledx0xx xxxx DAC7 Mute disabledx1xx xxxx DAC7 Mute enabled0xxx xxxx DAC8 Mute disabled1xxx xxxx DAC8 Mute enabled
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DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
69 45 ZERO8 ZERO7 ZERO6 ZERO5 ZERO4 ZERO3 ZERO2 ZERO1
ZERO[8:1] DAC Zero flag (read-only)These bits indicate the present status of the zero detect circuit for each DAC channel; these bitsare read-only.
ZERO DAC Zero flagxxxx xxx0 DAC1 zero input not detectedxxxx xxx1 DAC1 zero input detectedxxxx xx0x DAC2 zero input not detectedxxxx xx1x DAC2 zero input detectedxxxx x0xx DAC3 zero input not detectedxxxx x1xx DAC3 zero input detectedxxxx 0xxx DAC4 zero input not detectedxxxx 1xxx DAC4 zero input detectedxxx0 xxxx DAC5 zero input not detectedxxx1 xxxx DAC5 zero input detectedxx0x xxxx DAC6 zero input not detectedxx1x xxxx DAC6 zero input detectedx0xx xxxx DAC7 zero input not detectedx1xx xxxx DAC7 zero input detected0xxx xxxx DAC8 zero input not detected1xxx xxxx DAC8 zero input detected
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DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
70 46 ATMDDA ATSPDA DEMP1 DEMP0 AZRO2 AZRO1 AZRO0 ZREV
ATMDDA DAC Attenuation modeThis bit controls the DAC attenuation mode. ATDA1[7:0] to ATDA8[7:0] are simply used forATMDDA = 0, and ATDA0[7:0] + ATDA1[7:0] to ATDA0[7:0] + ATDA8[7:0] in decibel number areused for ATMDDA = 1.Default value: 0.ATMDDA DAC Attenuation mode0 Each channel with independent data (default)All channels with preset (independent) data + master (common) data in decibel1
number
ATSPDA DAC Attenuation speedThis bit controls the DAC attenuation speed. N × 2048/f
S
for ATSPDA = 0 and N × 4096/f
S
forATSPDA = 1. N is automatically selected according to the DAC sampling mode, SRDA, N = 1 forsingle rate, N = 2 for dual rate, and N = 4 for quad rate.Default value: 0.ATSPDA DAC Attenuation speed0 N × 2048/f
S
(default)1 N × 4096/f
S
DEMP[1:0] DAC Digital de-emphasis function/sampling rate controlThese bits are used to control the enable/disable and sampling frequency of the digitalde-emphasis function.Default value: 00.DEMP DAC Digital de-emphasis function/sampling rate control00 Disable (default)01 48 kHz enable10 44.1 kHz enable11 32 kHz enable
AZRO[2:0] DAC Zero flag function selectThe AZRO[2:0] bits are used to select the function of the zero flag pin.Default value: 000.AZRO DAC Zero flag function select000 DAC1/2/3/4/5/6/7/8 (8 channel) zero input detect with AND logic (default)001 DAC1/2/3/4/5/6/7/8 (8 channel) zero input detect with OR logic010 DAC1/2/3/4/5/6 (6 channel) zero input detect with AND logic011 DAC1/2/3/4/5/6 (6 channel) zero input detect with OR logic100 DAC7/8 (2 channel) zero input detect with AND logic101 DAC7/8 (2 channel) zero input detect with OR logic11x Reserved
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ZREV DAC Zero flag polarity selectThis bit controls the polarity of the zero flag pin.Default value: 0.ZREV DAC Zero flag polarity select0 High for zero detect (default)1 Low for zero detect
DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
71 47 ATDA07 ATDA06 ATDA05 ATDA04 ATDA03 ATDA02 ATDA01 ATDA0072 48 ATDA17 ATDA16 ATDA15 ATDA14 ATDA13 ATDA12 ATDA11 ATDA1073 49 ATDA27 ATDA26 ATDA25 ATDA24 ATDA23 ATDA22 ATDA21 ATDA2074 4A ATDA37 ATDA36 ATDA35 ATDA34 ATDA33 ATDA32 ATDA31 ATDA3075 4B ATDA47 ATDA46 ATDA45 ATDA44 ATDA43 ATDA42 ATDA41 ATDA4076 4C ATDA57 ATDA56 ATDA55 ATDA54 ATDA53 ATDA52 ATDA51 ATDA5077 4D ATDA67 ATDA66 ATDA65 ATDA64 ATDA63 ATDA62 ATDA61 ATDA6078 4E ATDA77 ATDA76 ATDA75 ATDA74 ATDA73 ATDA72 ATDA71 ATDA7079 4F ATDA87 ATDA86 ATDA85 ATDA84 ATDA83 ATDA82 ATDA81 ATDA80
ATDAx[7:0] DAC Digital attenuation level settingWhere x = 0 and 1 to 8, corresponding to the DAC channel, DACx (x = 1 to 8).Each DAC channel (VOUTx) has a digital attenuator function. The attenuation level can be setfrom 0 dB to – 100 dB in 0.5-dB steps, and also can be set to infinite attenuation (mute). Theattenuation level change from current value to target value is performed by incrementing ordecrementing with s-curve responses and a time set by ATSPDA. While an attenuation levelchange sequence is in progress, new processing of the attenuation level change for newcommands are ignored; any new commands are overwritten into the command buffer. The lastcommand for the attenuation level change is performed after the present attenuation levelchange sequence is finished.The attenuation level for each channel can be set individually using the following formula; thetable below shows attenuation levels for various settings.Attenuation level (dB) = 0.5 × (ATDAx[7:0]DEC – 255), where ATDAx[7:0]DEC = 0 through 255for ATDAx[7:0]DEC = 0 through 54, attenuation is set to infinite attenuation (Mute).ATDA0[7:0] are used to control all channels at the same time with attenuation data of ATDA0[7:0]+ ATDAx[7:0] in decibel number, when ATMDDA is set to '1'. This scheme provides preset andmaster volume operation.Default value: 1111 1111.
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ATDAx Decimal Attenuation level settingvalue1111 1111 255 0 dB, no attenuation (default)1111 1110 254 – 0.5 dB1111 1101 253 – 1.0 dB... ... ...1000 0001 129 – 63.0 dB1000 0000 128 – 63.5 dB0111 1111 127 – 64 dB... ... ...0011 1000 56 – 99.5 dB0011 0111 55 – 100 dB0011 0110 54 Mute... ... ...0000 0000 0 Mute
DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
80 50 — — — — — — SRAD1 SRAD0
SRAD[1:0] ADC Sampling mode selectThese bits control the sampling mode of ADC operation. In Auto mode, the sampling mode isautomatically set according to multiples between system clock and sampling clock, single rate for512 f
S
and 768 f
S
, and dual rate for 256 f
S
and 384 fS.Default value: 00.SRAD ADC Sampling mode select00 Auto (default)01 Single rate10 Dual rate11 Reserved
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......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
81 51 — MSAD2 MSAD1 MSAD0 — FMTAD2 FMTAD1 FMTAD0
MSAD[2:0] ADC Master/slave mode selectThese bits control the audio interface mode for ADC operation.Default value: 000 (slave mode).MSAD ADC Master/slave mode select000 Slave mode (default)001 Master mode, 768 f
S
010 Master mode, 512 f
S
011 Master mode, 384 f
S
100 Master mode, 256 f
S
101 Reserved110 Reserved111 Reserved
FMTAD[2:0] ADC Audio interface format selectThese bits control the audio interface format for ADC operation. The format details andrestrictions related to the system clock and master/slave mode are described in the Audio DataInterface Formats and Timing section.Default value: 000 (24-bit I
2
S format).FMTAD ADC Audio interface format select000 24-bit I
2
S format (default)001 24-bit left-justified format010 24-bit right-justified format011 16-bit right-justified format100 24-bit I
2
S mode DSP format101 24-bit left-justified mode DSP format110 24-bit I
2
S mode TDM format111 24-bit left-justified mode TDM format
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DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
82 52 — PSVAD2 PSVAD1 PSVAD0 — BYP2 BYP1 BYP0
PSVAD[2:0] ADC Power-save controlThese bits control the ADC power-save mode. In power-save mode, DOUT is forced into ZEROwith a fade-out sequence, the internal ADC data are reset, and the ADC goes into a power-downstate. For power-save mode release, a fade-in sequence is applied on DOUT in resume process.The serial mode control is enabled during this mode. Wait times greater than t
ADCDLY2
arerequired for the status change because of the power-save control turning on/off.Default value: 000.PSVAD ADC Power-save controlxx0 ADC1/2 normal operationxx1 ADC1/2 power-save modex0x ADC3/4 normal operationx1x ADC3/4 power-save mode0xx ADC5/6 normal operation1xx ADC5/6 power-save mode
BYP[2:0] ADC HPF bypass controlThese bits control the HPF function and dc components of the input signal; internal dc offset isconverted in bypass mode.Default value: 000.BYP ADC HPF bypass controlxx0 ADC1/2 normal output, HPF enabledxx1 ADC1/2 bypassed output, HPF disabledx0x ADC3/4 normal output, HPF enabledx1x ADC3/4 bypassed output, HPF disabled0xx ADC5/6 normal output, HPF enabled1xx ADC5/6 bypassed output, HPF disabled
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......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
83 53 — — SEAD6 SEAD5 SEAD4 SEAD3 SEAD2 SEAD1
SEAD[6:1] ADC Input configuration controlThese bits control the input configuration of each ADC channel, differential or single-ended.Default value: 00 0000 (all ADC channels have differential inputs).SEAD ADC Input configurationxx xxx0 ADC1 differential inputxx xxx1 ADC1 single-ended inputxx xx0x ADC2 differential inputxx xx1x ADC2 single-ended inputxx x0xx ADC3 differential inputxx x1xx ADC3 single-ended inputxx 0xxx ADC4 differential inputxx 1xxx ADC4 single-ended inputx0 xxxx ADC5 differential inputx1 xxxx ADC5 single-ended input0x xxxx ADC6 differential input1x xxxx ADC6 single-ended input
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DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
84 54 — — REVAD6 REVAD5 REVAD4 REVAD3 REVAD2 REVAD1
REVAD[6:1] ADC Input phase selectThese bits are used to control the phase of analog signal inputs.Default value: 00 0000.REVAD ADC Input phase selectxx xxx0 ADC1 normal inputxx xxx1 ADC1 inverted inputxx xx0x ADC2 normal inputxx xx1x ADC2 inverted inputxx x0xx ADC3 normal inputxx x1xx ADC3 inverted inputxx 0xxx ADC4 normal inputxx 1xxx ADC4 inverted inputx0 xxxx ADC5 normal inputx1 xxxx ADC5 inverted input0x xxxx ADC6 normal input1x xxxx ADC6 inverted input
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......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
85 55 — — MUTAD6 MUTAD5 MUTAD4 MUTAD3 MUTAD2 MUTAD1
MUTAD[6:1] ADC Soft Mute controlThese bits are used to enable or disable the Soft Mute function for the corresponding ADCoutputs, DOUT. The Soft Mute function is incorporated into the digital attenuators.When Mute is disabled (MUTAD[6:1] = 0), the attenuator and ADC operate normally. When Muteis enabled by setting MUTAD[6:1] = 1, the digital attenuator for the corresponding outputdecreases from the current setting to infinite attenuation with an s-curve responses and time setby ATSPAD.
By setting MUTAD[6:1] = 0, the attenuator increases to the last attenuation level with the s-curveresponse in same manner as for decreasing levels. This provides pop and zipper noise-freemuting for the ADC input.The Soft Mute control uses the same digital attenuation level resource setting as the ADC. Mutecontrol has priority over the digital attenuation level setting.Default value: 00 0000.MUTAD ADC Soft Mute controlxx xxx0 ADC1 Mute disabledxx xxx1 ADC1 Mute enabledxx xx0x ADC2 Mute disabledxx xx1x ADC2 Mute enabledxx x0xx ADC3 Mute disabledxx x1xx ADC3 Mute enabledxx 0xxx ADC4 Mute disabledxx 1xxx ADC4 Mute enabledx0 xxxx ADC5 Mute disabledx1 xxxx ADC5 Mute enabled0x xxxx ADC6 Mute disabled1x xxxx ADC6 Mute enabled
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DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
86 56 — — OVF6 OVF5 OVF4 OVF3 OVF2 OVF1
OVF[6:1] ADC Overflow flag (read-only)These bits indicate the status information of an overflow detect circuit for each ADC channel;these bits are read only. '1' means an overflow has been detected in the past, and reading thisregister resets all OVF bits.OVF ADC Overflow flagxx xxx0 ADC1 overflow input not detectedxx xxx1 ADC1 overflow input detectedxx xx0x ADC2 overflow input not detectedxx xx1x ADC2 overflow input detectedxx x0xx ADC3 overflow input not detectedxx x1xx ADC3 overflow input detectedxx 0xxx ADC4 overflow input not detectedxx 1xxx ADC4 overflow input detectedx0 xxxx ADC5 overflow input not detectedx1 xxxx ADC5 overflow input detected0x xxxx ADC6 overflow input not detected1x xxxx ADC6 overflow input detected
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DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
87 57 ATMDAD ATSPAD — — — — — OVFP
ATMDAD ADC Attenuation modeThis bit controls the ADC attenuation mode. ATAD1[7:0] to ATAD6[7:0] are simply used forATMDAD = 0, and ATAD0[7:0] + ATAD1[7:0] to ATAD0[7:0] + ATAD6[7:0] in decibel number areused for ATMDAD = 1.Default value: 0.ATMDAD ADC Attenuation mode0 Each channel with independent data (default)All channels with preset (independent) data + master (common) data in decibel1
number
ATSPAD ADC Attenuation speedThis bit controls the ADC attenuation Speed, N × 2048/f
S
for ATSPAD = 0 and N × 4096/f
S
forATSPAD = 1. N is automatically selected according to the ADC sampling mode, SRAD: N = 1 forsingle and N = 2 for dual rate.Default value: 0.ATSPAD ADC Attenuation speed0 N × 2048/f
S
(default)1 N × 4096/f
S
OVFP ADC Overflow flag polarity selectThis bit controls the polarity of the overflow flag pin.Default value: 0.OVFP ADC Overflow flag polarity select0 High for overflow detect (default)1 Low for overflow detect
DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
88 58 ATAD07 ATAD06 ATAD05 ATAD04 ATAD03 ATAD02 ATAD01 ATAD0089 59 ATAD17 ATAD16 ATAD15 ATAD14 ATAD13 ATAD12 ATAD11 ATAD1090 5A ATAD27 ATAD26 ATAD25 ATAD24 ATAD23 ATAD22 ATAD21 ATAD2091 5B ATAD37 ATAD36 ATAD35 ATAD34 ATAD33 ATAD32 ATAD31 ATAD3092 5C ATAD47 ATAD46 ATAD45 ATAD44 ATAD43 ATAD42 ATAD41 ATAD4093 5D ATAD57 ATAD56 ATAD55 ATAD54 ATAD53 ATAD52 ATAD51 ATAD5094 5E ATAD67 ATAD66 ATAD65 ATAD64 ATAD63 ATAD62 ATAD61 ATAD60
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ATADx[7:0] ADC Digital attenuation level settingWhere x = 0 and 1 to 6, corresponding to the ADC channel, ADCx (x = 1 to 6).Each ADC channel has a digital attenuator function with 20-dB gain. The attenuation level can beset from 20 dB to – 100 dB in 0.5-dB steps, and also can be set to infinite attenuation (mute). Theattenuation level change from current value to target value is performed by increment ordecrement with s-curve response and time set by ATSPAD. While the attenuation level changesequence is in progress, new processing of an attenuation level change for a new command isignored; the new command is overwritten into the command buffer. The last command for anattenuation level change is performed after the present attenuation level change sequence isfinished.
The attenuation level for each channel can be set individually using the following formula, and theabove table shows attenuation levels for various settings.Attenuation level (dB) = 0.5 × (ATADx[7:0]DEC – 215), where ATADx[7:0]DEC = 0 through 255for ATADx[7:0]DEC = 0 through 14, attenuation is set to infinite attenuation (Mute).ATAD0[7:0] is used to control all channels at the same time with attenuation data of ATAD0[7:0]+ ATADx[7:0] in decibel number, though maximum level is limited within +20 dB, when ATMDADis set to '1'. This scheme provides preset and master volume operation.Default value: 1101 0111.ATADx Decimal Attenuation level settingvalue1111 1111 255 +20.0 dB1111 1110 254 +19.5 dB1111 1101 253 +19.0 dB... ... ...1101 1000 216 +0.5 dB1101 0111 215 0 dB, no attenuation (default)1101 0110 214 – 0.5 dB... ... ...0001 0000 16 – 99.5 dB0000 1111 15 – 100.0 dB0000 1110 14 Mute... ... ...0000 0000 0 Mute
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APPLICATION INFORMATION
LRCKAD
BCKAD
DOUT1
DOUT2
DOUT3
SCKI
DIN1
DIN2
DIN3
DIN4
LRCKDA
BCKDA
MODE
Termination
OVF
RST
MS/ADR0/MD0
MDO/ADR1/MD1
MDI/SDA/DEMP
MC/SCL/FMT
ZERO
VIN1+
VIN1-
VIN2+
VIN2-
VIN3+
VIN3-
VIN4+
VIN4-
VIN5+
VIN5-
VIN6+
VIN6-
VDD1
DGND1
VDD2
DGND2
VCCAD1
AGNDA1
VCCAD2
AGNDAD2
VCOMAD
VREFAD1
VREFAD2
VOUT1+
VOUT1-
VOUT2+
VOUT2-
VOUT3+
VOUT3-
VOUT4+
VOUT4-
VOUT5+
VOUT5-
VOUT6+
VOUT6-
VOUT7+
VOUT7-
VOUT8+
VOUT8-
VCCDA1
AGNDDA1
VCCDA2
AGNDDA2
VCOMDA
PCM3168A
PCM3168A-Q1
C5
C6
C1
C7
C2
C3
C4
C8
C11
C9
C10
C12
ControlMCU
AnalogOutput
LPFandBuffer
AnalogInput
DigitalAudioProcessor
R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12
+
+
+
0V
5V
0V
3.3V
+
AnalogInput
AnalogInput
AnalogInput
AnalogInput
AnalogInput
AnalogOutput
LPFandBuffer
AnalogOutput
LPFandBuffer
AnalogOutput
LPFandBuffer
AnalogOutput
LPFandBuffer
AnalogOutput
LPFandBuffer
AnalogOutput
LPFandBuffer
AnalogOutput
LPFandBuffer
+
+
3.3V
48
3.3V
48
48
0V
48
0V
(1) (2) (3) (4)
PCM3168A
PCM3168A-Q1
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......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
A typical circuit connection for six-channel analog in and eight-channel analog out is shown in Figure 56 .
C
1
through C
6
are 1- µF ceramic capacitors dependent on power-supply quality. C
7
and C
8
are 10- µF electrolytic capacitors dependent onpower-supply quality. C
9
and C
10
are 10- µF electrolytic capacitors. C
11
and C
12
are 10- µF electrolytic capacitors. R
1
through R
12
are 22- Ωto100- Ωresistors.
Figure 56. Example Board Layout
Termination for mode control: any one of the circuits shown in Figure 57 must be applied according to thenecessary mode/configuration. Resistor value must be 220 k Ω, ± 5% tolerant. The PowerPAD must be tied to theground plane with enough electrical and thermal conductivity; see the example board layout in Figure 56 .
Figure 57. Typical Circuit Connections
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R1
1 Fm
+
AnalogInput-
(1V )
RMS
VIN-
(1V )
RMS
R1
1 Fm
+
AnalogInput+
(1V )
RMS
VIN+
(1V )
RMS
C1
R1
1.5kW
1.5kW
470pF
10 Fm
0.1 Fm
R1
4.7kW
4.7kW
470pF
R3
R2
C1
R3
R2
C1
C2
VIN-
(1V )
RMS
VIN+
(1V )
RMS
VCOMAD
AnalogInput
(2V )
RMS
+
PCM3168A
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Typical interface circuits for analog input and analog output are shown in Figure 58 through Figure 63 .
R
1
= 47- Ωto 470- Ωresistor, C
1
= 0.01-pF to 0.001- µF capacitor; f
– 3 dB
= 160 kHz.NOTE: The signal source impedance must be low enough to apply this configuration.
Figure 58. Basic Differential Input Circuit with Anti-Aliasing LPF for Differential ADC Input
Amplifier is an NE5532A x2 or OPA2134 x2; R
1
= 1.5-k Ωresistor; R
2
= 750- Ωresistor; R
3
= 47- Ωresistor; C
1
= 3300-pF capacitor; C
2
=0.01- µF capacitor; Gain = 1; f
– 3 dB
= 45 kHz.
Figure 59. Single-Ended to Differential Buffer and Anti-Aliasing LPF for Differential ADC Input
56 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): PCM3168A PCM3168A-Q1
10 Fm
0.1 Fm
R3
R2
R2
22pF
R3
R1
R2
C1
C2
VIN+
(1V )
RMS
VIN-
(1V )
RMS
VCOMAD
AnalogInput
(2V )
RMS
+
10 Fm
0.1 Fm
R3
R1
R2
C1
C2
VIN+
(1V )
RMS
VCOMAD
AnalogInput
(2V )
RMS
+
C2
VIN-
PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
Amplifier is an NE5532A x1 or OPA2134 x1; R
1
= 3-k Ωresistor; R
2
= 1.5-k Ωresistor; R
3
= 47- Ωresistor; C
1
= 2200-pF capacitor; C
2
=0.01- µF capacitor; Gain = 1; f
– 3 dB
= 48 kHz.
Figure 60. Single-Ended to Differential Buffer and Anti-Aliasing LPF for Differential ADC Input
Amplifier is an NE5532A x1 or OPA2134 x1; R
1
= 3-k Ωresistor; R
2
= 1.5-k Ωresistor; R
3
= 47- Ωresistor; C
1
= 2200-pF capacitor; C
2
=0.022- µF capacitor; Gain = 0.5; f
– 3 dB
= 48 kHz.
Figure 61. Buffer and Anti-Aliasing LPF for Single-Ended ADC Input
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 57
Product Folder Link(s): PCM3168A PCM3168A-Q1
10 Fm
47W
R1R3
R2
C2
AnalogOutput
(2V )
RMS
VOUT-
(4V )
PP
+
10 FmR1R3
VOUT+
(4V )
PP
+
C2
R2
C1
47W
R1R3
R2
C2
AnalogOutput
(2V )
RMS
VOUT-
(4V )
PP
R1R3
VOUT+
(4V )
PP
C2
R2
C1
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
www.ti.com
Amplifier is an NE5532A x1/2 or OPA2134 x1/2; R
1
= 7.5-k Ωresistor; R
2
= 5.6-k Ωresistor; R
3
= 360- Ωresistor; C
1
= 3300-pF capacitor; C
2
=680-pF capacitor; Gain = 0.747; f
– 3 dB
= 53 kHz.
Figure 62. Post-LPF and Differential to Single-Ended Buffer for DAC Output (AC-Coupled)
Amplifier is an NE5532A x1/2 or OPA2134 x1/2; R
1
= 15-k Ωresistor; R
2
= 11-k Ωresistor; R
3
= 820- Ωresistor; C
1
= 1500-pF capacitor; C
2
=330-pF capacitor; Gain = 0.733; f
– 3 dB
= 54 kHz.
Figure 63. Post-LPF and Differential to Single-Ended Buffer for DAC Output (DC-Coupled)
58 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): PCM3168A PCM3168A-Q1
DESIGN AND LAYOUT CONSIDERATIONS
Power-Supply Pins (VCCAD1/2, VCCDA1/2, and VDD1/2)
Grounding (AGNDAD1/2, AGNDDA1/2, and DGND1/2)
VIN1 ± , VIN2 ± , VIN3 ± , VIN4 ± , VIN5 ± , and VIN6 ± Pins
VCOMAD and VCOMDA Pins
VREFAD1/2 Pins
VOUT1 ± , VOU2 ± , VOUT3 ± , VOUT4 ± , VOUT5 ± , VOUT6 ± , VOU7 ± , and VOUT8 ± Pins
PCM3168A
PCM3168A-Q1
www.ti.com
......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
The digital and analog power-supply pins of the PCM3168A and PCM3168A-Q1 should be bypassed to thecorresponding ground pins with 1- µF ceramic capacitors placed as close to the pins as possible. Eachpower-supply line (VCC, VDD) to the PCM3168A and PCM3168A-Q1 should be bypassed to the correspondingground pins with 10- µF electrolytic capacitors to maximize the dynamic performance of the ADC and DAC.
Although the PCM3168A and PCM3168A-Q1 have two power lines to maximize the potential of dynamicperformance, using one common source (for instance, a +5-V power supply for VCC and a +3.3-V power supplyfor VDD generated from one common source) is recommended to avoid unexpected power-supply trouble suchas latch-up or incorrect power-supply conditions. Also, simultaneous power-on/off of VCC and VDD isrecommended to avoid unexpected transient responses in outputs, though the power-supply sequence of VCCand VDD is not specified in the operation and absolute maximum ratings point of view.
To maximize the dynamic performance of the PCM3168A and PCM3168A-Q1, the analog and digital groundsare not connected internally. These pins should have very low impedances to avoid digital noise and signalcomponents feeding back into the analog ground. All ground pins should be connected directly to each otherunder the part, and the device should be connected to the analog ground of the application, as with acceptableanalog layout practices; this layout reduces the potential of noise problems.
In case of direct interface to VINx ± , 1- µF electrolytic capacitors are recommended because the ac-couplingcapacitor (which gives a 2-Hz HPF corner frequency and 47 Ωand 0.1 µF to 470 Ωand 0.001 µF differentialLPF) is recommended as the anti-aliasing filter that gives a 160-kHz LPF corner frequency. If signal sourceimpedance is not enough (too low) or input line length to the VINx ± is not enough (too short), insertion of ananalog front-end buffer (see Figure 59 to Figure 61 ) is recommended to maximize the dynamic performance. Thevoltage coefficient of the capacitor for an anti-aliasing filter should be considered to maximize the THDperformance. A film-type capacitor is recommended; if a ceramic capacitor is used, a relatively higher voltagetype is recommended.
There are three ways to terminate any unused input pins. First, terminate these pins to AGNDAD with 0.001- µFto 1- µF capacitors. This termination is applied on unused pins whose channels are configured in single-endedmode. The second form of termination is to connect the positive (+) pin and negative ( – ) pins together andterminating these to AGNDAD with 0.001- µF to 1- µF capacitors. This option applies to unused pins with channelsthat are configured in differential mode. The last termination method is to terminat the pins directly to VCOMAD;this option can be applied on unused pins with unused channels combined into two channels that are thenconfigured in power-save mode.
10- µF electrolytic capacitors are recommended between VCOMAD and AGNDAD, and VCOMDA and AGNDDAto ensure a low source impedance of ADC and DAC common voltages. These capacitors should be located asclose to each pin as possible to reduce dynamic errors on the ADC and DAC common voltages.
10- µF electrolytic capacitors are recommended between VREFAD1/2 and AGNDAD to ensure low sourceimpedances of ADC references. These capacitors should be located as close to each pin as possible to reducedynamic errors on ADC references.
The differential to single-ended buffer with post LPF can be directly connected (without capacitors) to theseoutput pins (see Figure 63 ), thereby minimizing the use of coupling capacitors for the 2-V
RMS
outputs. The opamp and resistors should be determined with consideration of degrading some performance through thisdifferential to single-ended and LPF buffer; there is about 1.5-dB degradation seen in the examples of Figure 62and Figure 63 .
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 59
Product Folder Link(s): PCM3168A PCM3168A-Q1
MODE Pin
RST Pin
OVF Pin
System Clock and Audio Interface Clocks
PowerPAD
External Mute Control
PCM3168A
PCM3168A-Q1
SBAS452 – SEPTEMBER 2008 .........................................................................................................................................................................................
www.ti.com
This pin is a logic input with quad-state input capability. The MODE pin is high when connected to VDD, lowwhen connected to DGND, and pulled up or pulled down through an external resistor and for the two mid-statesin order to distinguish the four input states. The pull-up or pull-down resistor must be 220 k Ω, ± 5% in tolerance.Note that the state of the MODE pin is only sampled by a power-on or a low-to-high transition of the RST pin.
When the MODE pin setting changes to change the operating mode, the new mode setting does not take effectimmediately; a RST pin toggle is required to make the new mode setting valid, and for the new mode to takeeffect.
The OVF pin has two functions. It is primarily the flag for ADC overflow occurrence detection. It is also used toindicate that the internal reset sequence is complete and that the device is ready to enter serial mode control.
The quality of SCKI may influence dynamic performance, because the PCM3168A and PCM3168A-Q1 (both theADC and DAC) operate based on SCKI. Therefore, it may be required to consider the jitter, duty, and rise/falltime of the system clock.
In slave mode, the PCM3168A and PCM3168A-Q1 do not require a specific timing relationship betweenBCKAD/LRCKAD and SCKI, and BCKDA/LRCKDA and SCKI; however, there is a possibility of performancedegradation with a certain timing relationship between them. In that case, specific timing relationship controlmight resolve this performance degradation.
In master mode, there is a possibility of performance degradation because of heavy loads on BCKAD/LRCKAD,BCKDA/LRCKDA, and DOUT1/2/3. It is recommended to load these pins as lightly as possible. Note that alloutput clocks and signals go low; they do not go into a high-impedance state during power-save mode.
The PowerPAD of the PCM3168A and PCM3168A-Q1 is internally connected to the substrate of the silicon. Itshould be connected to the ground plane with sufficient low conductance in electrical and thermal; see Figure 56 .The PowerPAD size is 7,25 mm x 7,00 mm (0,725 cm × 0.7 cm).
For power-down ON/OFF control without the pop-noise that is generated by a dc level change on the DACoutput, the external mute control is generally required. Use of the following control sequence is recommended:external mute ON, codec power-down ON, SCKI stop and resume if necessary, codec power-down OFF, andexternal mute OFF control.
60 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): PCM3168A PCM3168A-Q1
PACKAGE OPTION ADDENDUM
www.ti.com 5-Jul-2012
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
PCM3168APAP ACTIVE HTQFP PAP 64 160 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR
PCM3168APAPR ACTIVE HTQFP PAP 64 1000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR
PCM3168APAPRG4 ACTIVE HTQFP PAP 64 1000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR
PCM3168ATPAPQ1 ACTIVE HTQFP PAP 64 160 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR
PCM3168ATPAPRQ1 ACTIVE HTQFP PAP 64 1000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR
PCM3168ATPAPRQ1G4 ACTIVE HTQFP PAP 64 1000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
PACKAGE OPTION ADDENDUM
www.ti.com 5-Jul-2012
Addendum-Page 2
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF PCM3168A, PCM3168A-Q1 :
•Catalog: PCM3168A
•Automotive: PCM3168A-Q1
NOTE: Qualified Version Definitions:
•Catalog - TI's standard catalog product
•Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
PCM3168APAPR HTQFP PAP 64 1000 330.0 24.4 13.0 13.0 1.5 16.0 24.0 Q2
PCM3168ATPAPRQ1 HTQFP PAP 64 1000 330.0 24.4 13.0 13.0 1.5 16.0 24.0 Q2
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
PCM3168APAPR HTQFP PAP 64 1000 367.0 367.0 45.0
PCM3168ATPAPRQ1 HTQFP PAP 64 1000 367.0 367.0 45.0
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 2
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