Low Power, Precision, Auto-Zero Op Amps
Data Sheet
AD8538/AD8539
Rev. B Document Feedback
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FEATURES
Low offset voltage: 13 µV maximum
Input offset drift: 0.03 µV/°C
Single-supply operation: 2.7 V to 5.5 V
High gain, CMRR, and PSRR
Low input bias current: 25 pA
Low supply current: 180 µA
Qualified for automotive applications
APPLICATIONS
Mobile communications
Portable instrumentation
Battery-powered devices
Sensor interfaces
Temperature measurement
Electronic scales
GENERAL DESCRIPTION
The AD8538/AD8539 are very high precision amplifiers featuring
extremely low offset voltage, low input bias current, and low power
consumption. The supply current is less than 215 μA maximum
per amplifier at 5.0 V. Operation is fully specified from 2.7 V to
5.0 V single supply (±1.35 V to ±2.5 V dual supply).
The AD8538/AD8539 operate at very low power making these
amplifiers ideal for battery-powered devices and portable
equipment.
The AD8538/AD8539 are specified over the extended industrial
temperature range (−40°C to +125°C). The AD8538 amplifier is
available in 5-lead TSOT-23, and 8-lead, narrow body SOIC
packages, and the AD8539 amplifier is available in 8-lead, narrow
body SOIC and 8-lead MSOP. See the Ordering Guide for the
automotive part.
PIN CONFIGURATIONS
OUT 1
V– 2
+IN 3
V+
5
–IN
4
AD8538
TOP VIEW
(Not t o Scale)
06741-002
Figure 1. 5-Lead TSOT-23 (UJ-5)
NC
1
−IN
2
+IN
3
V−
4
NC
8
V+
7
OUT
6
NC
5
NC = NO CONNECT
AD8538
TOP VIEW
(Not t o Scale)
06741-001
Figure 2. 8-Lead SOIC_N (R-8)
OUT A
1
–IN A
2
+IN A
3
V–
4
V+
8
OUT B
7
–IN B
6
+IN B
5
AD8539
TOP VIEW
(Not t o Scale)
06741-033
Figure 3. 8-Lead SOIC_N (R-8)
OUT A 1
–IN A 2
+IN A 3
V– 4
V+
8
OUT B
7
–IN B
6
+IN B
5
AD8539
TOP VIEW
(Not t o Scale)
06741-034
Figure 4. 8-Lead MSOP (RM-8)
AD8538/AD8539 Data Sheet
Rev. B | Page 2 of 24
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Pin Configuration Diagrams ........................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
AD8538 Electrical Specifications ............................................... 3
AD8539 Electrical Specifications ............................................... 5
Absolute Maximum Ratings ............................................................7
Thermal Resistance .......................................................................7
ESD Caution...................................................................................7
Typical Performance Characteristics ..............................................8
AD8538 Characteristics ................................................................8
AD8539 Characteristics ............................................................. 14
Outline Dimensions ....................................................................... 20
Ordering Guide .......................................................................... 21
REVISION HISTORY
2/13—Rev. A to Rev. B
Changes to Features Section and General Description Section ... 1
Updated Outline Dimensions ....................................................... 20
Changes to Ordering Guide .......................................................... 21
Added Automotive Products Section........................................... 21
5/07—Rev. 0 to Rev. A
Added AD8539 ................................................................... Universal
Changes to Specifications Section .................................................. 3
Added Table 3, Renumbered Tables Sequentially ........................ 5
Added Table 4, Renumbered Tables Sequentially ......................... 6
Changes to Thermal Resistance Section ........................................ 7
Added Figure 32 and Figure 33 .................................................... 13
Added AD8539 Characteristics Section, Renumbered Figures
Sequentially ..................................................................................... 14
Updated Outline Dimensions ....................................................... 20
Changes to Ordering Guide .......................................................... 21
10/05—Revision 0: Initial Version
Data Sheet AD8538/AD8539
Rev. B | Page 3 of 24
SPECIFICATIONS
AD8538 ELECTRICAL SPECIFICATIONS
@ VS = 5.0 V, VCM = 2.5 V, VO = 2.5 V, TA = 25°C, unless otherwise specified.
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage VOS 5 13 µV
−40°C ≤ TA ≤ +125°C 30 µV
Input Bias Current IB 15 25 pA
−40°C ≤ TA ≤ +85°C 35 100 pA
−40°C ≤ TA ≤ +125°C 0.7 1.0 nA
Input Offset Current IOS 20 50 pA
−40°C ≤ TA ≤ +125°C 150 pA
Input Voltage Range 0 5 V
Common-Mode Rejection Ratio CMRR VCM = 0 V to 5 V 115 150 dB
−40°C ≤ TA ≤ +125°C, VCM = 0.2 V to 4.8 V 100 135 dB
Large Signal Voltage Gain AVO RL = 10 kΩ, VO = 0.1 V to 4.9 V 115 141 dB
−40°C ≤ TA ≤ +125°C 110 135 dB
Offset Voltage Drift ∆VOS/∆T −40°C ≤ TA ≤ +125°C 0.03 0.1 µV/°C
OUTPUT CHARACTERISTICS
Output Voltage High VOH RL = 100 kΩ to ground 4.99 4.998 V
−40°C ≤ TA ≤ +125°C, RL = 100 kΩ to ground 4.98 V
RL = 10 kΩ to ground 4.95 4.970 V
−40°C ≤ TA ≤ +125°C, RL = 10 kΩ to ground 4.94 V
Output Voltage Low VOL RL = 100 kΩ to V+ 1.9 5 mV
−40°C ≤ TA ≤ +125°C, RL = 100 kΩ to V+ 2.8 7 mV
RL = 10 kΩ to V+ 17 20 mV
−40°C ≤ TA ≤ +125°C, RL = 10 kΩ to V+ 20 30 mV
Short-Circuit Limit ISC ±25 mA
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.0 V 105 125 dB
−40°C ≤ TA ≤ +125°C 100 125 dB
Supply Current/Amplifier ISY IO = 0 150 180 µA
−40°C ≤ TA ≤ +125°C 190 215 µA
DYNAMIC PERFORMANCE
Slew Rate SR RL =10 kΩ 0.4 V/µs
Settling Time 0.01% tS G = ±1, 2 V step, CL = 20 pF, RL = 1 kΩ 10 μs
Overload Recovery Time 0.05 ms
Gain Bandwidth Product
GBP
430
kHz
Phase Margin ØM RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF 65 Degrees
NOISE PERFORMANCE
Voltage Noise en p-p f = 0.1 Hz to 10 Hz 2.0 µV p-p
Voltage Noise Density en f = 1 kHz 50 nV/√Hz
AD8538/AD8539 Data Sheet
Rev. B | Page 4 of 24
@ VS = 2.7 V, VCM = 1.35 V, VO = 1.35 V, TA = 25°C, unless otherwise specified.
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage VOS 5 13 µV
−40°C ≤ TA ≤ +125°C 30 µV
Input Bias Current
I
B
15
25
pA
−40°C ≤ TA ≤ +85°C 35 100 pA
−40°C ≤ TA ≤ +125°C 0.7 1.0 nA
Input Offset Current IOS 20 50 pA
−40°C ≤ TA ≤ +125°C 150 pA
Input Voltage Range
0
2.7
V
Common-Mode Rejection Ratio CMRR VCM = 0 V to 2.5 V 110 140 dB
−40°C ≤ TA ≤ +125°C 100 135 dB
Large Signal Voltage Gain AVO RL = 10 kΩ, VO = 0.1 V to 1.7 V 110 140 dB
−40°C ≤ TA ≤ +125°C 105 135 dB
Offset Voltage Drift ∆VOS/∆T −40°C ≤ TA ≤ +125°C 0.03 0.1 µV/°C
OUTPUT CHARACTERISTICS
Output Voltage High VOH RL = 100 kΩ to ground 2.68 2.698 V
−40°C ≤ T
A
≤ +125°C, R
L
= 100 kΩ to ground
2.68
V
RL = 10 kΩ to ground 2.67 2.68 V
−40°C ≤ TA ≤ +125°C, RL = 10 kΩ to ground 2.66 V
Output Voltage Low VOL RL = 100 kΩ to V+ 1.7 5 mV
−40°C ≤ TA ≤ +125°C, RL = 100 kΩ to V+ 2.4 5 mV
RL = 10 kΩ to V+ 14 20 mV
−40°C ≤ TA ≤ +125°C, RL = 10 kΩ to V+ 20 25 mV
Short-Circuit Limit ISC ±8 mA
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.5 V 105 125 dB
−40°C ≤ TA ≤ +125°C 100 125 dB
Supply Current/Amplifier ISY IO = 0 150 180 µA
−40°C ≤ TA ≤ +125°C 190 215 µA
DYNAMIC PERFORMANCE
Slew Rate SR RL = 10 kΩ 0.35 V/µs
Settling Time 0.01% tS G = ±1, 1 V step, CL = 20 pF, RL = 1 kΩ 5 μs
Overload Recovery Time 0.05 ms
Gain Bandwidth Product GBP 430 kHz
Phase Margin ØM RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF 65 Degrees
NOISE PERFORMANCE
Voltage Noise
e
n p-p
f = 0.1 Hz to 10 Hz
2.0
µV p-p
Voltage Noise Density en f = 1 kHz 50 nV/√Hz
Data Sheet AD8538/AD8539
Rev. B | Page 5 of 24
AD8539 ELECTRICAL SPECIFICATIONS
@ VS = 5.0 V, VCM = 2.5 V, VO = 2.5 V, TA = 25°C, unless otherwise specified.
Table 3.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage VOS 5 15 µV
−40°C ≤ TA ≤ +125°C 30 µV
Input Bias Current IB 15 60 pA
−40°C ≤ TA ≤ +85°C 35 125 pA
−40°C ≤ TA ≤ +125°C 0.7 1.0 nA
Input Offset Current IOS 20 70 pA
−40°C ≤ TA ≤ +125°C 400 pA
Input Voltage Range 0 5 V
−40°C ≤ TA ≤ +125°C 0.2 4.8 V
Common-Mode Rejection Ratio CMRR VCM = 0 V to 5 V 115 135 dB
−40°C ≤ TA ≤ +125°C, VCM = 0.2 V to 4.8 V 100 130 dB
Large Signal Voltage Gain AVO RL = 10 kΩ, VO = 0.1 V to 4.9 V 110 130 dB
−40°C ≤ TA ≤ +125°C 110 125 dB
Offset Voltage Drift ∆VOS/∆T −40°C ≤ TA ≤ +125°C 0.03 0.1 µV/°C
OUTPUT CHARACTERISTICS
Output Voltage High VOH RL = 100 kΩ to ground 4.99 4.994 V
−40°C ≤ TA ≤ +125°C, RL = 100 kΩ to ground 4.98 V
R
L
= 10 kΩ to ground
4.95
4.97
V
−40°C ≤ TA ≤ +125°C, RL = 10 kΩ to ground 4.94 V
Output Voltage Low VOL RL = 100 kΩ to V+ 5 7 mV
−40°C ≤ TA ≤ +125°C, RL = 100 kΩ to V+ 6 8 mV
RL = 10 kΩ to V+ 20 25 mV
−40°C ≤ TA ≤ +125°C, RL = 10 kΩ to V+ 24 30 mV
Short-Circuit Limit ISC ±25 mA
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.0 V 105 125 dB
−40°C ≤ TA ≤ +125°C 100 125 dB
Supply Current/Amplifier ISY IO = 0 170 210 µA
−40°C ≤ TA ≤ +125°C 225 µA
DYNAMIC PERFORMANCE
Slew Rate SR RL =10 kΩ 0.4 V/µs
Settling Time 0.01% tS G = ±1, 2 V step, CL = 20 pF, RL = 1 kΩ 10 μs
Overload Recovery Time 0.05 ms
Gain Bandwidth Product
GBP
430
kHz
Phase Margin ØM RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF 65 Degrees
NOISE PERFORMANCE
Voltage Noise en p-p f = 0.1 Hz to 10 Hz 1.2 µV p-p
Voltage Noise Density en f = 1 kHz 52 nV/
√
Hz
AD8538/AD8539 Data Sheet
Rev. B | Page 6 of 24
@ VS = 2.7 V, VCM = 1.35 V, VO = 1.35 V, TA = 25°C, unless otherwise specified.
Table 4.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage VOS 5 16 µV
−40°C ≤ TA ≤ +125°C 30 µV
Input Bias Current
I
B
15
25
pA
−40°C ≤ TA ≤ +85°C 35 125 pA
−40°C ≤ TA ≤ +125°C 0.7 1.0 nA
Input Offset Current IOS 20 50 pA
−40°C ≤ TA ≤ +125°C 300 pA
Input Voltage Range
0
2.7
V
−40°C ≤ TA ≤ +125°C 0.2 2.5
Common-Mode Rejection Ratio CMRR VCM = 0 V to 2.7 V 110 130 dB
−40°C ≤ TA ≤ +125°C, VCM = 0.2 V to 2.5 V 100 125 dB
Large Signal Voltage Gain AVO RL = 10 kΩ, VO = 0.1 V to 2.6 V 110 130 dB
−40°C ≤ TA ≤ +125°C 105 125 dB
Offset Voltage Drift
∆
VOS/
∆
T −40°C ≤ TA ≤ +125°C 0.03 0.1 µV/°C
OUTPUT CHARACTERISTICS
Output Voltage High
V
OH
R
L
= 100 kΩ to ground
2.68
2.693
V
−40°C ≤ TA ≤ +125°C, RL = 100 kΩ to ground 2.68 V
RL = 10 kΩ to ground 2.67 2.68 V
−40°C ≤ TA ≤ +125°C, RL = 10 kΩ to ground 2.66 V
Output Voltage Low VOL RL = 100 kΩ to V+ 5 7 mV
−40°C ≤ TA ≤ +125°C, RL = 100 kΩ to V+ 6 8 mV
RL = 10 kΩ to V+ 14 20 mV
−40°C ≤ TA ≤ +125°C, RL = 10 kΩ to V+ 20 25 mV
Short-Circuit Limit ISC ±8 mA
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.5 V 105 125 dB
−40°C ≤ TA ≤ +125°C 100 125 dB
Supply Current/Amplifier ISY IO = 0 210 µA
−40°C ≤ TA ≤ +125°C 225 µA
DYNAMIC PERFORMANCE
Slew Rate SR RL = 10 kΩ 0.35 V/µs
Settling Time 0.01% tS G = ±1, 1 V step, CL = 20 pF, RL = ∞ 8 μs
Overload Recovery Time 0.05 ms
Gain Bandwidth Product GBP 430 kHz
Phase Margin ØM RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF 65 Degrees
NOISE PERFORMANCE
Voltage Noise en p-p f = 0.1 Hz to 10 Hz 2.0 µV p-p
Voltage Noise Density en f = 1 kHz 55 nV/√Hz
Data Sheet AD8538/AD8539
Rev. B | Page 7 of 24
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 5.
Parameter Rating
Supply Voltage +6 V
Input Voltage VSS − 0.3 V to VDD + 0.3 V
Differential Input Voltage ±6 V
Output Short-Circuit Duration to GND Observe derating curve
Storage Temperature Range –65°C to +150°C
Lead Temperature (Soldering, 60 sec) 300°C
Operating Temperature Range –40°C to +125°C
Junction Temperature Range −65°C to +150°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Absolute maximum ratings apply at 25°C, unless otherwise noted.
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 6. Thermal Characteristics
Package Type θJA θ
JC Unit
5-Lead TSOT-23 (UJ-5) 207 61 °C/W
8-Lead SOIC_N (R-8) 125 43 °C/W
8-Lead MSOP (RM-8) 145 45 °C/W
ESD CAUTION
AD8538/AD8539 Data Sheet
Rev. B | Page 8 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
AD8538 CHARACTERISTICS
AD8538 only, VSY = 5 V or ±2.5 V, unless otherwise noted.
450
0
–10.0
06741-003
INPUT OFFSET VOLTAGE (µV)
NUMBER OF AM P LI FI E RS
50
100
150
200
250
300
350
400
V
SY
= 5V
0V < V
CM
< 5V
T
A
= 25°C
–8.4 –6.8 –5.2 –3.6 –2.0 –0.4 1.2 2.8 4.4 6.0 7.6 9.2
Figure 5. AD8538 Input Offset Voltage Distribution
14
000.096
06741-004
TCV
OS
(µV/°C)
NUMBER OF AM P LI FI E RS
2
4
6
8
10
12
0.012 0.024 0.036 0.048 0.060 0.072 0.084
V
SY
= 5V
–40°C < T
A
< +125 °
C
Figure 6. AD8538 Input Offset Voltage Drift Distribution
10
–100 5
06741-005
INPUT COMMON-MODE VOLT AGE (V)
INPUT OFFSET VOLTAGE (µV)
–8
–6
–4
–2
0
2
4
6
8
1 2 3 4
V
SY
= 5V
T
A
= 25°C
Figure 7. AD8538 Input Offset Voltage vs. Input Common-Mode Voltage
700
0
100
200
300
400
500
600
25 45 65 85 105 125
06741-006
TEMPERAT URE ( °C)
INP UT BIAS CURRE NT (pA)
V
SY
= 5V AND 2.7V
Figure 8. AD8538 Input Bias Current vs. Temperature
160
00 5
06741-007
SUPPLY VOLT AGE (V)
SUPP LY CURRENT (µA)
20
40
60
80
100
120
140
1 2 3 4
T
A
= 25°C
Figure 9. AD8538 Supply Current vs. Supply Voltage
200
0
50
100
150
–40 10 60 110
06741-008
TEMPERAT URE ( °C)
SUPPLY CURRENT (µA)
V
SY
= 5V
V
SY
= 2.7V
Figure 10. AD8538 Supply Current vs. Temperature
Data Sheet AD8538/AD8539
Rev. B | Page 9 of 24
10000
0.01
0.1
1
10
100
1000
0.001 1010.10.01
06741-009
LOAD CURRENT ( mA)
OUTPUT SATURATION VOLTAGE (mV)
V
SY
– V
OH
V
SY
= 5V
T
A
= 25° C
SOURCE
SINK
V
OL
Figure 11. AD8538 Output Saturation Voltage vs. Load Current
35
0
5
10
15
20
25
30
–40 –25 –10 520 35 50 65 80 95 110 125
06741-010
TEMPERAT URE ( °C)
OUTPUT SATURATION VOLTAGE (mV)
V
SY
– V
OH
V
SY
= 5V
R
L
= 10kΩ
V
OL
Figure 12. AD8538 Output Saturation Voltage vs. Temperature
60
–201k 10k 100k 1M
06741-011
FREQUENCY (Hz)
CLOSED-LOOP GAIN (dB)
0
20
40
V
SY
= 5V AND 2.7V
C
L
= 20pF
R
L
= 2kΩ
A
V
= 10
A
V
= 100
A
V
= 1
Figure 13. AD8538 Closed-Loop Gain vs. Frequency
70
–20
–10
0
10
30
40
50
60
20
–45
0
45
90
1k 10k 100k 1M
06741-012
FREQUENCY (Hz)
OPEN-LOOP GAIN ( dB)
OPEN-LOOP PHASE SHIF T (Degrees)
V
SY
= ±2. 5V AND ±1.35V
R
L
= 100kΩ
C
L
= 20pF
135
ФM
Figure 14. AD8538 Open-Loop Gain and Phase vs. Frequency
120
0
100 1M
06741-013
FREQUENCY (Hz)
CMRR (dB)
20
40
60
80
100
1k 10k 100k
VSY = 5V AND 2.7V
TA = 25°C
Figure 15. AD8538 CMRR vs. Frequency
100
0
100 1M
06741-014
FREQUENCY (Hz)
PSRR ( dB)
20
40
60
80
1k 10k 100k
VSY = ±2.5V AND ±1.35V
TA = 25°C
+PSRR
–PSRR
Figure 16. AD8538 PSRR vs. Frequency
AD8538/AD8539 Data Sheet
Rev. B | Page 10 of 24
1000
0.01
1
0.1
10
100
100 1k 10k 100k 1M
06741-022
FREQUENCY (Hz)
OUTPUT IMP E DANCE ( Ω)
V
SY
= 5V AND 2.7V
A
V
= 1
A
V
= 10
A
V
= 100
Figure 17. AD8538 Closed-Loop Output Impedance vs. Frequency
60
011000
06741-015
LOAD CAPACI TANCE ( pF )
SMALL SIGNAL OVERSHOOT (%)
10
20
30
40
50
10 100
V
SY
= 5V
T
A
= 25°C
R
L
= 2kΩ
OS+
OS–
Figure 18. AD8538 Small Signal Overshoot vs. Load Capacitance
TIME (4µs/DIV)
VOLTAGE ( 50mV /DIV )
06741-016
VSY = 5V AND 2.7V
AV = 1
CL = 300pF
RL = 2kΩ
Figure 19. AD8538 Small Signal Transient Response
TIME (4µs/DIV)
VOLTAGE (1V/DIV)
06741-017
VSY = 5V
AV = 1
CL = 300pF
RL = 10kΩ
Figure 20. AD8538 Large Signal Transient Response
TIME (10µs/DIV)
06741-018
VSY = 5V
AV = –50
VOUT (V) VIN (mV)
100
0
0
–2.5
Figure 21. AD8538 Positive Overload Recovery
TIME (10µs/DIV)
VOUT (V) VIN (mV)
06741-019
VSY = 5V
AV = –50
0
–100
2.5
0
Figure 22. AD8538 Negative Overload Recovery
Data Sheet AD8538/AD8539
Rev. B | Page 11 of 24
1000
10
100
10 100 1k 10k
06741-021
FREQUENCY (Hz)
VOLTAGE NOISE DENSITY (n V/√Hz)
V
SY
= 5V
T
A
= 25°C
Figure 23. AD8538 Voltage Noise Density
TIME (1s/DIV)
VOLTAGE ( 500nV/ DIV)
06741-020
VSY = 5V AND 2. 7V
Figure 24. AD8538 0.1 Hz to 10 Hz Input Voltage Noise
TIME (200µs/DIV)
VOLTAGE (1V/DIV)
06741-023
VSY = 5V
AV = 1
VIN = 6V p-p
RL = 10kΩ
VOUT
VIN
Figure 25. AD8538 No Phase Reversal
AD8538/AD8539 Data Sheet
Rev. B | Page 12 of 24
VSY = 2.7 V or ±1.35 V, AD8538 only, unless otherwise noted.
180
0
06741-024
INPUT OFFSET VOLTAGE (µV)
NUMBER OF AM P LI FI E RS
20
40
60
80
100
120
140
160
–10.0–8.4 –6.8 –5.2 –3.6 –2.0 –0.4 1.2 2.8 4.4 6.0 7.6 9.2
V
SY
= 2.7V
0V < V
CM
< 2.7V
T
A
= 25°C
Figure 26. AD8538 Input Offset Voltage Distribution
35
0
06741-025
TCV
OS
(µV/°C)
NUMBER OF AM P LI FI E RS
5
10
15
20
25
30
00.012 0.024 0.036 0.048 0.060 0.072 0.084 0.096
V
SY
= 2.7V
–40°C < T
A
< +125°C
Figure 27. AD8538 Input Offset Voltage Drift Distribution
10
–1002.5
06741-026
INPUT COMMON-MODE VOLT AGE (V)
INPUT OFFSET VOLTAGE (µV)
–8
–6
–4
–2
0
2
4
6
8
0.5 1.0 1.5 2.0
V
SY
= 2.7V
T
A
= 25°C
Figure 28. AD8538 Input Offset Voltage vs. Input Common-Mode Voltage
10000
0.1
0.001 1
06741-027
LOAD CURRENT ( mA)
OUTPUT SATURATION VOLTAGE (mV)
1
10
100
1000
0.01 0.1
SINK
SOURCE
V
SY
= 2.7V
T
A
= 25°C
Figure 29. AD8538 Output Saturation Voltage vs. Load Current
30
0
–40 125
06741-028
TEMPERATURE (°C)
OUTPUT SATURATION VOLTAGE (mV)
5
10
15
20
25
–25 –10 520 35 50 65 80 95 110
V
SY
= 2.7V
R
L
= 10kΩ
V
SY
= VOH
VOL
Figure 30. AD8538 Output Saturation Voltage vs. Temperature
80
011000
06741-029
LOAD CAPACI TANCE ( pF )
SMALL SIGNAL OVERSHOOT (%)
10
20
30
40
50
60
70
10 100
OS+
OS–
V
SY
= 2.7V
T
A
= 25° C
R
L
= 2kΩ
Figure 31. AD8538 Small Signal Overshoot vs. Load Capacitance
Data Sheet AD8538/AD8539
Rev. B | Page 13 of 24
TIME (4µs/DIV)
VOLTAGE ( 500mV /DIV )
06741-030
VSY = 2.7V
AV = 1
CL = 100pF
RL = 10kΩ
Figure 32. AD8538 Large Signal Transient Response
1000
10
100
10 100 1k 10k 100k
06741-032
FREQUENCY (Hz)
VOLTAGE NOISE DENSITY (n V/√Hz)
V
SY
= 2.7V
T
A
= 25°C
Figure 33. AD8538 Voltage Noise Density
AD8538/AD8539 Data Sheet
Rev. B | Page 14 of 24
AD8539 CHARACTERISTICS
AD8539 only, VS = 5 V or ±2.5 V, unless otherwise noted.
06741-035
–10–9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10
V
OS
(µV)
800
700
600
500
400
300
200
100
0
NUMBER OF AM PL I F IERS
AD8539
V
SY
= 5V
0 < V
CM
< 5V
T
A
= 25°C
Figure 34. AD8539 Input Offset Voltage Distribution
0 0.016 0.032 0.048 0.064 0.080 0.096
TCV
OS
(µV)
60
50
40
30
20
10
0
NUMBER OF AMPLIFIERS
AD8539
V
SY
= ±2.5V
–40°C < V
CM
< 125°C
06741-036
Figure 35. AD8539 Input Offset Voltage Drift Distribution
20
10
0
–10
–20
V
OS
(µV)
012345
V
CM
(V)
06741-037
AD8539
V
SY
= 5V
0V < V
CM
< 5V
T
A
= 25°C
Figure 36. AD8539 Input Offset Voltage vs. Input Common-Mode Voltage
5 25 45 65 85 105 125
TEM P E RATURE (°C)
1000.0
100.0
10.0
1.0
0.1
0.01
INPUT BIAS CURRENT ( pA)
06741-038
AD8539
V
SY
= 5V
Figure 37. AD8539 Input Bias Current vs. Temperature
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VSY (V)
400
350
300
250
200
150
100
50
0
ISY (µA)
AD8539
VSY = 0V TO 5V
–40°C < TA < + 125°C
06741-039
+125°C
–40°C
+85°C
+25°C
Figure 38. AD8539 Supply Current vs. Supply Voltage
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
400
375
350
325
300
275
250
225
200
I
SY
(µA)
AD8539
V
SY
= ±2.5V
V
SY
= ±1.35V
06741-040
Figure 39. AD8539 Supply Current vs. Temperature
Data Sheet AD8538/AD8539
Rev. B | Page 15 of 24
06741-041
AD8539
10000
1000
100
10
1
0.1
OUTPUT SATURATION VOLTAGE (mV)
0.001 0.01 0.1 1 10 100
ILOAD (mA)
SINK, VS = ± 1.35V
SOURCE, VS = ± 2.5V
SOURCE, VS = ± 1.35V
SINK, VS = ± 2.5V
Figure 40. AD8539 Output Saturation Voltage vs. Load Current
35
30
25
20
15
10
5
0
OUTPUT SATURATION VOLTAGE (mV)
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
06741-042
AD8539
V
S
= 5V
V
DD
- V
OH
, I
L
= 250µA, R
L
= 10kΩ
V
DD
- V
OH
, I
L
= 25µA, R
L
= 100kΩ
V
OL
, I
L
= 250µA, R
L
= 10kΩ
V
OL
, I
L
= 25µA, R
L
= 100kΩ
Figure 41. AD8539 Output Saturation Voltage vs. Temperature
06741-043
60
40
20
0
–20
–40
CLOSED-LOOP GAIN (dB)
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
A
V
= 100
A
V
= 10
A
V
= 1
AD8539
V
SY
= ±2.5V
R
L
= 2kΩ
C
L
= 20pF
Figure 42. AD8539 Closed-Loop Gain vs. Frequency
06741-044
120
100
80
60
40
20
0
–20
–40
–60
–80
–100
–120
GAIN (Degrees)
120
100
80
60
40
20
0
–20
–40
–60
–80
–100
–120
PHASE (Degrees)
1k 10k 100k 1M 10M
FREQUENCY (Hz)
AD8539
V
SY
= ±2.5V
R
L
= 2kΩ
C
L
= 20pF
Figure 43. AD8539 Open-Loop Gain and Phase vs. Frequency
06741-045
140
120
100
80
60
40
20
0
CMRR (dB)
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
CHANNEL B
CHANNEL A
AD8539
V
SY
= ±2.5V
Figure 44. AD8539 CMRR vs. Frequency
06741-046
120
100
80
60
40
20
0
–20
PSRR (dB)
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
PSRR–
AD8539
V
SY
= ±2.5V
PSRR+
Figure 45. AD8539 PSRR vs. Frequency
AD8538/AD8539 Data Sheet
Rev. B | Page 16 of 24
06741-047
1000
900
800
700
600
500
400
300
200
100
0.01
Z
OUT
(Ω)
100 1k 10k 100k 1M 10M
FRE QUENCY ( Hz )
AD8539
V
SY
= ±2. 5V
A
V
= 100 A
V
= 10 A
V
= 1
Figure 46. AD8539 Closed-Loop Output Impedance vs. Frequency
06741-048
60
50
40
30
20
10
0
OVERSHOOT (%)
110 100 1k
CAPACI TANCE (pF )
OS–
OS+
AD8539
V
SY
= ±2. 5V
R
L
= 2kΩ
Figure 47. AD8539 Small Signal Overshoot vs. Load Capacitance
06741-049
TIME (2µs/DIV)
VOLTAGE (50mV/DIV)
AD8539
V
SY
= 5V
A
V
= 1
C
L
= 300pF
R
L
= 2kΩ
Figure 48. AD8539 Small Signal Transient Response
06741-050
TIME (4µs/DIV)
VOLTAGE (1V/DIV)
AD8539
V
SY
= 5V
A
V
= 1
C
L
= 300pF
R
L
= 10kΩ
Figure 49. AD8539 Large Signal Transient Response
06741-051
INPUT VOLTAGE
OUTPUT VOLTAGE
AD8539
VSY = ± 2.5V
AV = –50
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
–0.20
–0.25
INPUT VOLTAGE (50mV/DIV)
5
4
3
2
1
0
–1
–2
–3
OUTPUT VOLTAGE (1V/DIV)
TIME ( 20µs/ DIV)
Figure 50. AD8539 Positive Overload Recovery
06741-052
INPUT VOLTAGE
OUTPUT VOLTAGE
AD8539
V
SY
= ±2. 5V
A
V
= –50
0.05
0
–0.05
–0.10
–0.15
–0.20
–0.25
–0.30
–0.35
INPUT VOLTAGE (50mV/DIV)
7.5
6.5
5.5
4.5
3.5
2.5
1.5
0.5
–0.5
OUTPUT VOLTAGE (5V/DIV)
TIME ( 20µs/ DIV)
Figure 51. AD8539 Negative Overload Recovery
Data Sheet AD8538/AD8539
Rev. B | Page 17 of 24
06741-053
1k
100
10
100 1k 10k 100k
FRE QUENCY ( Hz )
AD8539
V
SY
= ±2. 5V
VOLT AGE NOI SE DENSITY (n V Hz)
Figure 52. AD8539 Voltage Noise Density
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
VO LTAGE ( 200mV /DI V )
–5 –4 –3 –2 –1 0 1 2 3 4 5
TIME (1s/DIV)
AD8539
VSY = 5V
AV = 1M
06741-054
Figure 53. AD8539 0.1 Hz to 10 Hz Input Voltage Noise
06741-055
INPUT VOLTAGE
OUTPUT
VOLTAGE
AD8539
V
SY
= ±2. 5V
A
V
= 1
R
L
= 10kΩ
VOLTAGE (2V/DIV)
TIME ( 200µs/ DIV)
Figure 54. AD8539 No Phase Reversal
06741-056
0
–20
–40
100 1k 10k 100k
FRE QUENCY ( Hz )
CHANNEL S E P ARATION (dB)
–60
–80
–100
–120
–140
–160
AD8539
V
SY
= ±2. 5V
Figure 55. AD8539 Channel Separation vs. Frequency
AD8538/AD8539 Data Sheet
Rev. B | Page 18 of 24
VS = 2.7 V or ±1.35 V, TA = 25°C, AD8539 only, unless otherwise noted.
06741-057
–10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10
V
OS
350
300
250
200
150
100
50
0
NUMBER OF AMPLIFIERS
AD8539
V
SY
= 2.7V
0V < V
CM
< 2.7V
T
A
= 25°C
Figure 56. AD8539 Input Offset Voltage Distribution
0 0.016 0.032 0.048 0.064 0.080 0.096
TCV
OS
(µV)
45
40
35
30
25
20
15
10
5
0
NUMBER OF AMPLIFIERS
06741-058
AD8539
V
SY
= ±1.35V
–40°C < T
A
< +125°C
Figure 57. AD8539 Input Offset Voltage Drift Distribution
20
15
10
5
0
–5
–10
–15
–20
V
OS
(µV)
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7
V
CM
(V)
AD8539
V
SY
= 2.7V
0V < V
CM
< 2.7V
T
A
= 25°C
06741-059
Figure 58. AD8539 Input Offset Voltage vs. Input Common-Mode Voltage
06741-060
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
35
30
25
20
15
10
5
0
OUTPUT SATURATION VOLTAGE (mV)
AD8539
V
SY
= 2.7V
V
DD
– V
OH
, R
L
= 10kΩ
V
DD
– V
OH
, R
L
= 100kΩ
V
OL
, R
L
= 10kΩ
V
OL
, R
L
= 100kΩ
Figure 59. AD8539 Output Saturation Voltage vs. Temperature
06741-061
60
70
80
50
40
30
20
10
0
OVERSHOOT (%)
1 10 100 1k
CAPACITANCE (pF)
OS+
AD8539
V
SY
= ±1.35V
R
L
= 2kΩ
OS–
Figure 60. AD8539 Small Signal Overshoot vs. Load Capacitance
06741-062
TIME (4µs/DIV)
VOLTAGE (500mV/DIV)
AD8539
V
SY
= ±1.35V
A
V
= 1
C
L
= 300pF
R
L
= 10kΩ
Figure 61. AD8539 Large Signal Transient Response
Data Sheet AD8538/AD8539
Rev. B | Page 19 of 24
06741-063
1k
100
10
100 1k 10k 100k
FRE QUENCY ( Hz )
AD8539
V
SY
= ±1. 35V
VOLT AGE NOI SE DENSITY (n V/ Hz)
Figure 62. AD8539 Voltage Noise Density
06741-064
0
–20
–40
100 1k 10k 100k
FRE QUENCY ( Hz )
CHANNEL S E P ARATION (dB)
–60
–80
–100
–120
–140
–160
AD8539
VSY = ± 1.35V
Figure 63. AD8539 Channel Separation vs. Frequency
AD8538/AD8539 Data Sheet
Rev. B | Page 20 of 24
OUTLINE DIMENSIONS
100708-A
*COMPL IANT T O JEDE C ST ANDARDS M O-1 93- AB WITH
THE EXCEPTION OF PACKAGE HEIGHT AND THICKNESS.
1.60 BSC 2.80 BSC
1.90
BSC
0.95 BSC
0.20
0.08
0.60
0.45
0.30
8°
4°
0°
0.50
0.30
0.10 MAX
*1.00 MAX
*0.90 MAX
0.70 MIN
2.90 BSC
54
123
SEATING
PLANE
Figure 64. 5-Lead Thin Small Outline Transistor Package [TSOT-23]
(UJ-5)
Dimensions shown in millimeters
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
COMPLIANT TO JEDEC STANDARDS MS-012-AA
012407-A
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
0.50 (0.0196)
0.25 (0.0099) 45°
8°
0°
1.75 (0.0688)
1.35 (0.0532)
SEATING
PLANE
0.25 (0.0098)
0.10 (0.0040)
4
1
85
5.00(0.1968)
4.80(0.1890)
4.00 (0.1574)
3.80 (0.1497)
1.27 (0.0500)
BSC
6.20 (0.2441)
5.80 (0.2284)
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
Figure 65. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
Data Sheet AD8538/AD8539
Rev. B | Page 21 of 24
COMPLIANT TO JEDEC STANDARDS MO-187-AA
6°
0°
0.80
0.55
0.40
4
8
1
5
0.65 BSC
0.40
0.25
1.10 MAX
3.20
3.00
2.80
COPLANARITY
0.10
0.23
0.09
3.20
3.00
2.80
5.15
4.90
4.65
PIN 1
IDENTIFIER
15° MAX
0.95
0.85
0.75
0.15
0.05
10-07-2009-B
Figure 66. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
ORDERING GUIDE
Model1, 2 Temperature Range Package Description Package Option Branding
AD8538AUJZ-R2 −40°C to +125°C 5-Lead TSOT-23 UJ-5 A0C
AD8538AUJZ-REEL −40°C to +125°C 5-Lead TSOT-23 UJ-5 A0C
AD8538AUJZ-REEL7 −40°C to +125°C 5-Lead TSOT-23 UJ-5 A0C
AD8538WAUJZ-R7 −40°C to +125°C 5-Lead TSOT-23 UJ-5 AOC
AD8538ARZ −40°C to +125°C 8-Lead SOIC_N R-8
AD8538ARZ-REEL −40°C to +125°C 8-Lead SOIC_N R-8
AD8538ARZ-REEL7 −40°C to +125°C 8-Lead SOIC_N R-8
AD8539ARMZ −40°C to +125°C 8-Lead MSOP RM-8 A1S
AD8539ARMZ-REEL −40°C to +125°C 8-Lead MSOP RM-8 A1S
AD8539ARZ −40°C to +125°C 8-Lead SOIC_N R-8
AD8539ARZ-REEL −40°C to +125°C 8-Lead SOIC_N R-8
AD8539ARZ-REEL7 −40°C to +125°C 8-Lead SOIC_N R-8
1 Z = RoHS Compliant Part.
2 W = Qualified for Automotive Applications.
AUTOMOTIVE PRODUCTS
The AD8538W model is available with controlled manufacturing to support the quality and reliability requirements of automotive
applications. Note that this automotive model may have specifications that differ from the commercial models; therefore, designers
should review the Specifications section of this data sheet carefully. Only the automotive grade products shown are available for use in
automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to
obtain the specific Automotive Reliability reports for these models.
AD8538/AD8539 Data Sheet
Rev. B | Page 22 of 24
NOTES
Data Sheet AD8538/AD8539
Rev. B | Page 23 of 24
NOTES
AD8538/AD8539 Data Sheet
Rev. B | Page 24 of 24
NOTES
©2005–2013 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D06741-0-2/13(B)
