LM6132 Dual/LM6134 Quad
Low Power 10 MHz Rail-to-Rail I/O Operational
Amplifiers
General Description
The LM6132/34 provides new levels of speed vs power per-
formance in applications where low voltage supplies or
power limitations previously made compromise necessary.
With only 360 µA/amp supply current, the 10 MHz
gain-bandwidth of this device supports new portable applica-
tions where higher power devices unacceptably drain battery
life.
The LM6132/34 can be driven by voltages that exceed both
power supply rails, thus eliminating concerns over exceeding
the common-mode voltage range. The rail-to-rail output
swing capability provides the maximum possible dynamic
range at the output. This is particularly important when oper-
ating on low supply voltages. The LM6132/34 can also drive
large capacitive loads without oscillating.
Operating on supplies from 2.7V to over 24V, the LM6132/34
is excellent for a very wide range of applications, from bat-
tery operated systems with large bandwidth requirements to
high speed instrumentation.
Features
(For 5V Supply, Typ Unless Noted)
nRail-to-Rail input CMVR −0.25V to 5.25V
nRail-to-Rail output swing 0.01V to 4.99V
nHigh gain-bandwidth, 10 MHz at 20 kHz
nSlew rate 12 V/µs
nLow supply current 360 µA/Amp
nWide supply range 2.7V to over 24V
nCMRR 100 dB
nGain 100 dB with R
L
= 10k
nPSRR 82 dB
Applications
nBattery operated instrumentation
nInstrumentation Amplifiers
nPortable scanners
nWireless communications
nFlat panel display driver
Connection Diagrams
Ordering Information
Package Temperature Range NSC Transport
Industrial, −40˚C to +85˚C Drawing Media
8-Pin Molded DIP LM6132AIN, LM6132BIN N08E Rails
8-Pin Small Outline LM6132AIM, LM6132BIM M08A Rails
LM6132AIMX, LM6132BIMX M08A Tape and Reel
14-Pin Molded DIP LM6134AIN, LM6134BIN N14A Rails
14-Pin Small Outline LM6134AIM, LM6134BIM M14A Rails
LM6134AIMX, LM6134BIMX M14A Tape and Reel
8-Pin DIP/SO
DS012349-1
Top View
14-Pin DIP/SO
DS012349-2
Top View
April 2000
LM6132 Dual and LM6134 Quad, Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers
© 2000 National Semiconductor Corporation DS012349 www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
ESD Tolerance (Note 2) 2500V
Differential Input Voltage 15V
Voltage at Input/Output Pin (V
+
)+0.3V, (V
)−0.3V
Supply Voltage (V
+
–V
) 35V
Current at Input Pin ±10 mA
Current at Output Pin (Note 3) ±25 mA
Current at Power Supply Pin 50 mA
Lead Temp. (soldering, 10 sec.) 260˚C
Storage Temperature Range −65˚C to +150˚C
Junction Temperature (Note 4) 150˚C
Operating Ratings(Note 1)
Supply Voltage 1.8V V
S
24V
Junction Temperature Range
LM6132, LM6134 −40˚C T
J
+85˚C
Thermal resistance (θ
JA
)
N Package, 8-pin Molded DIP 115˚C/W
M Package, 8-pin Surface Mount 193˚C/W
N Package, 14-pin Molded DIP 81˚C/W
M Package, 14-pin Surface Mount 126˚C/W
5.0V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25˚C, V
+
= 5.0V, V
= 0V, V
CM
=V
O
=V
+
/2 and R
L
>1Mto V
S
/2.
Boldface limits apply at the temperature extremes
Symbol Parameter Conditions Typ
(Note 5)
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
V
OS
Input Offset Voltage 0.25 2
46
8mV
max
TCV
OS
Input Offset Voltage Average Drift 5µV/C
I
B
Input Bias Current 0V V
CM
5V 110 140
300 180
350 nA
max
I
OS
Input Offset Current 3.4 30
50 30
50 nA
max
R
IN
Input Resistance, CM 104 M
CMRR Common Mode Rejection Ratio 0V V
CM
4V 100 75
70 75
70 dB
min
0V V
CM
5V 80 60
55 60
55
PSRR Power Supply Rejection Ratio ±2.5V V
S
±12V 82 78
75 78
75 dB
min
V
CM
Input Common-Mode Voltage
Range −0.25 00V
5.25 5.0 5.0
A
V
Large Signal Voltage Gain R
L
= 10k 100 25
815
6V/mV
min
V
O
Output Swing 100k Load 4.992 4.98
4.93 4.98
4.93 V
min
0.007 0.017
0.019 0.017
0.019 V
max
10k Load 4.952 4.94
4.85 4.94
4.85 V
min
0.032 0.07
0.09 0.07
0.09 V
max
5k Load 4.923 4.90
4.85 4.90
4.85 V
min
0.051 0.095
0.12 0.095
0.12 V
max
I
SC
Output Short Circuit Current
LM6132 Sourcing 4 2
22
1mA
min
Sinking 3.5 1.8
1.8 1.8
1mA
min
LM6132/LM6134
www.national.com 2
5.0V DC Electrical Characteristics (Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25˚C, V
+
= 5.0V, V
= 0V, V
CM
=V
O
=V
+
/2 and R
L
>1Mto V
S
/2.
Boldface limits apply at the temperature extremes
Symbol Parameter Conditions Typ
(Note 5)
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
I
SC
Output Short Circuit Current
LM6134 Sourcing 3 2
1.6 2
1mA
min
Sinking 3.5 1.8
1.3 1.8
1mA
min
I
S
Supply Current Per Amplifier 360 400
450 400
450 µA
max
5.0V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25˚C, V
+
= 5.0V, V
= 0V, V
CM
=V
O
=V
+
/2 and R
L
>1Mto V
S
/2.
Boldface limits apply at the temperature extremes
Symbol Parameter Conditions Typ
(Note 5)
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
SR Slew Rate ±4V @V
S
=±6V 14 8 8 V/µs
R
S
<1k77min
GBW Gain-Bandwidth Product f = 20 kHz 10 7.4 7.4 MHz
77min
θm Phase Margin R
L
= 10k 33 deg
G
m
Gain Margin R
L
= 10k 10 dB
e
n
Input Referred Voltage Noise f = 1 kHz 27
i
n
Input Referred Current Noise f = 1 kHz 0.18
LM6132/LM6134
www.national.com3
2.7V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25˚C, V
+
= 2.7V, V
= 0V, V
CM
=V
O
=V
+
/2 and R
L
>1Mto V
S
/2.
Boldface limits apply at the temperature extreme
Symbol Parameter Conditions Typ
(Note 5)
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
V
OS
Input Offset Voltage 0.12 2 6 mV
812max
I
B
Input Bias Current 0V V
CM
2.7V 90 nA
I
OS
Input Offset Current 2.8 nA
R
IN
Input Resistance 134 M
CMRR Common Mode 0V V
CM
2.7V 82 dB
Rejection Ratio
PSRR Power Supply ±1.35V V
S
±12V 80 dB
Rejection Ratio
V
CM
Input Common-Mode 2.7 2.7 V
Voltage Range 0 0
A
V
Large Signal R
L
= 10k 100 V/mV
Voltage Gain
V
O
Output Swing R
L
= 100k 0.03 0.08 0.08 V
0.112 0.112 max
2.66 2.65 2.65 V
2.25 2.25 min
I
S
Supply Current Per Amplifier 330 µA
2.7V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25˚C, V
+
= 2.7V, V
= 0V, V
CM
=V
O
=V
+
/2 and R
L
>1Mto V
S
/2.
Symbol Parameter Conditions Typ
(Note 5)
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
GBW Gain-Bandwidth Product R
L
= 10k, f = 20 kHz 7 MHz
θ
m
Phase Margin R
L
= 10k 23 deg
G
m
Gain Margin 12 dB
LM6132/LM6134
www.national.com 4
24V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25˚C, V
+
= 24V, V
= 0V, V
CM
=V
O
=V
+
/2 and R
L
>1Mto V
S
/2.
Boldface limits apply at the temperature extreme
Symbol Parameter Conditions Typ
(Note 5)
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
V
OS
Input Offset Voltage 1.7 3 7 mV
59max
I
B
Input Bias Current 0V V
CM
24V 125 nA
I
OS
Input Offset Current 4.8 nA
R
IN
Input Resistance 210 M
CMRR Common Mode 0V V
CM
24V 80 dB
Rejection Ratio
PSRR Power Supply 2.7V V
S
24V 82 dB
Rejection Ratio
V
CM
Input Common-Mode −0.25 0 0 V min
Voltage Range 24.25 24 24 V max
A
V
Large Signal R
L
= 10k 102 V/mV
Voltage Gain
V
O
Output Swing R
L
= 10k 0.075 0.15 0.15 V
max
23.86 23.8 23.8 V
min
I
S
Supply Current Per Amplifier 390 450 450 µA
490 490 max
24V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25˚C, V
+
= 24V, V
= 0V, V
CM
=V
O
=V
+
/2 and R
L
>1Mto V
S
/2.
Symbol Parameter Conditions Typ
(Note 5)
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
GBW Gain-Bandwidth Product R
L
= 10k, f = 20 kHz 11 MHz
θ
m
Phase Margin R
L
= 10k 23 deg
G
m
Gain Margin R
L
= 10k 12 dB
THD +
NTotal Harmonic A
V
= +1, V
O
= 20V
P-P
0.0015 %
Distortion and Noise f = 10 kHz
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical characteristics.
Note 2: Human body model, 1.5 kin series with 100 pF.
Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the
maximum allowed junction temperature of 150˚C.
Note 4: The maximum power dissipation is a function of TJ(max),θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD=(T
J(max)
−T
A
)/θJA. All numbers apply for packages soldered directly into a PC board.
Note 5: Typical Values represent the most likely parametric norm.
Note 6: All limits are guaranteed by testing or statistical analysis.
LM6132/LM6134
www.national.com5
Typical Performance Characteristics T
A
= 25˚C, R
L
=10kunless otherwise specified
Supply Current vs
Supply Voltage
DS012349-3
Offset Voltage vs
Supply Voltage
DS012349-5
dV
OS
vs V
CM
DS012349-6
dV
OS
vs V
CM
DS012349-7
dV
OS
vs V
CM
DS012349-8
I
bias
vs V
CM
DS012349-9
I
bias
vs V
CM
DS012349-10
I
bias
vs V
CM
DS012349-11
Input Bias Current vs
Supply Voltage
DS012349-12
Neg PSRR vs
Frequency
DS012349-13
Pos PSSR vs
Frequency
DS012349-14
dV
OS
vs
Output Voltage
DS012349-15
LM6132/LM6134
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Typical Performance Characteristics T
A
= 25˚C, R
L
=10kunless otherwise specified (Continued)
dV
OS
vs
Output Voltage
DS012349-16
dV
OS
vs
Output Voltage
DS012349-17
CMRR vs Frequency
DS012349-18
Output Voltage vs
Sinking Current
DS012349-19
Output Voltage vs
Sinking Current
DS012349-20
Output Voltage vs
Sinking Current
DS012349-21
Output Voltage vs
Sourcing Current
DS012349-22
Output Voltage vs
Sourcing Current
DS012349-23
Output Voltage vs
Sourcing Current
DS012349-24
LM6132/LM6134
www.national.com7
Typical Performance Characteristics T
A
= 25˚C, R
L
=10kunless otherwise specified (Continued)
LM6132/34 Application Hints
The LM6132 brings a new level of ease of use to opamp sys-
tem design.
With greater than rail-to-rail input voltage range concern
over exceeding the common-mode voltage range is elimi-
nated.
Rail-to-rail output swing provides the maximum possible dy-
namic range at the output. This is particularly important
when operating on low supply voltages.
The high gain-bandwidth with low supply current opens new
battery powered applications, where high power consump-
tion, previously reduced battery life to unacceptable levels.
To take advantage of these features, some ideas should be
kept in mind.
ENHANCED SLEW RATE
Unlike most bipolar opamps, the unique phase reversal
prevention/speed-up circuit in the input stage eliminates
phase reversal and allows the slew rate to be very much a
function of the input signal amplitude.
Figure 2
shows how excess input signal is routed around the
input collector-base junctions directly to the current mirrors.
The LM6132/34 input stage converts the input voltage
change to a current change. This current change drives the
current mirrors through the collectors of Q1–Q2, Q3–Q4
when the input levels are normal.
Noise Voltage vs
Frequency
DS012349-25
Noise Current vs
Frequency
DS012349-38
NF vs Source Resistance
DS012349-39
Gain and Phase vs
Frequency
DS012349-28
Gain and Phase vs
Frequency
DS012349-29
Gain and Phase vs
Frequency
DS012349-30
GBW vs Supply
Voltage at 20 kHz
DS012349-31
LM6132/LM6134
www.national.com 8
LM6132/34 Application Hints
(Continued)
If the input signal exceeds the slew rate of the input stage
and the differential input voltage rises above a diode drop,
the excess signal bypasses the normal input transistors,
(Q1–Q4), and is routed in correct phase through the two ad-
ditional transistors, (Q5, Q6), directly into the current mirrors.
This rerouting of excess signal allows the slew-rate to in-
crease by a factor of 10 to 1 or more. (See
Figure 1
.)
As the overdrive increases, the opamp reacts better than a
conventional opamp. Large fast pulses will raise the slew-
rate to around 25V to 30V/µs.
This effect is most noticeable at higher supply voltages and
lower gains where incoming signals are likely to be large.
This speed-up action adds stability to the system when driv-
ing large capacitive loads.
DRIVING CAPACITIVE LOADS
Capacitive loads decrease the phase margin of all opamps.
This is caused by the output resistance of the amplifier and
the load capacitance forming an R-C phase lag network.
This can lead to overshoot, ringing and oscillation. Slew rate
limiting can also cause additional lag. Most opamps with a
fixed maximum slew-rate will lag further and further behind
when driving capacitive loads even though the differential in-
put voltage raises. With the LM6132, the lag causes the slew
rate to raise. The increased slew-rate keeps the output fol-
lowing the input much better. This effectively reduces phase
lag. After the output has caught up with the input, the differ-
ential input voltage drops down and the amplifier settles
rapidly.
These features allow the LM6132 to drive capacitive loads
as large as 500 pF at unity gain and not oscillate. The scope
photos (
Figure 3
and
Figure 4
) above show the LM6132 driv-
ing a 500 pF load. In
Figure 3
, the lower trace is with no ca-
pacitive load and the upper trace is with a 500 pF load. Here
we are operating on ±12V supplies with a 20 Vp-p pulse. Ex-
Slew Rate vs Differential V
IN
V
S
=±12V
DS012349-40
FIGURE 1.
DS012349-36
FIGURE 2.
LM6132/LM6134
www.national.com9
LM6132/34 Application Hints
(Continued)
cellent response is obtained with a C
f
of 39 pF. In
Figure 4
,
the supplies have been reduced to ±2.5V, the pulse is
4 Vp-p and C
f
is 39 pF. The best value for the compensation
capacitor should be established after the board layout is fin-
ished because the value is dependent on board stray capac-
ity, the value of the feedback resistor, the closed loop gain
and, to some extent, the supply voltage.
Another effect that is common to all opamps is the phase
shift caused by the feedback resistor and the input capaci-
tance. This phase shift also reduces phase margin. This ef-
fect is taken care of at the same time as the effect of the ca-
pacitive load when the capacitor is placed across the
feedback resistor.
The circuit shown in
Figure 5
was used for these scope
photos.
Figure 6
shows a method for compensating for load capaci-
tance (C
o
) effects by adding both an isolation resistor Ro at
the output and a feedback capacitor C
F
directly between the
output and the inverting input pin. Feedback capacitor C
F
compensates for the pole introduced by R
o
and C
o
, minimiz-
ing ringing in the output waveform while the feedback resis-
tor R
F
compensates for dc inaccuracies introduced by R
o
.
Depending on the size of the load capacitance, the value of
R
o
is typically chosen to be between 100to1k.
Typical Applications
3 OPAMP INSTRUMENTATION AMP WITH
RAIL-TO-RAIL INPUT AND OUTPUT
Using the LM6134, a 3 opamp instrumentation amplifier with
rail-to-rail inputs and rail to rail output can be made. These
features make these instrumentation amplifiers ideal for
single supply systems.
Some manufacturers use a precision voltage divider array of
5 resistors to divide the common-mode voltage to get an in-
put range of rail-to-rail or greater. The problem with this
method is that it also divides the signal, so to even get unity
gain, the amplifier must be run at high closed loop gains.
This raises the noise and drift by the internal gain factor and
lowers the input impedance. Any mismatch in these preci-
sion resistors reduces the CMR as well. Using the LM6134,
all of these problems are eliminated.
In this example, amplifiers A and B act as buffers to the dif-
ferential stage (
Figure 7
). These buffers assure that the input
impedance is over 100 Mand they eliminate the require-
ment for precision matched resistors in the input stage. They
also assure that the difference amp is driven from a voltage
source. This is necessary to maintain the CMR set by the
matching of R1–R2 with R3–R4.
DS012349-45
FIGURE 3.
DS012349-42
FIGURE 4.
DS012349-43
FIGURE 5.
DS012349-37
FIGURE 6.
LM6132/LM6134
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Typical Applications (Continued)
FLAT PANEL DISPLAY BUFFERING
Three features of the LM6132/34 make it a superb choice for
TFT LCD applications. First, its low current draw (360 µAper
amplifier @5V) makes it an ideal choice for battery powered
applications such as in laptop computers. Second, since the
device operates down to 2.7V, it is a natural choice for next
generation 3V TFT panels. Last, but not least, the large ca-
pacitive drive capability of the LM6132 comes in very handy
in driving highly capacitive loads that are characteristic of
LCD display drivers.
The large capacitive drive capability of the LM6132/34 al-
lows it to be used as buffers for the gamma correction refer-
ence voltage inputs of resistor-DAC type column (Source)
drivers in TFT LCD panels. This amplifier is also useful for
buffering only the center reference voltage input of
Capacitor-DAC type column (Source) drivers such as the
LMC750X series.
Since for VGA and SVGA displays, the buffered voltages
must settle within approximately 4 µs, the well known tech-
nique of using a small isolation resistor in series with the am-
plifier’s output very effectively dampens the ringing at the
output.
With its wide supply voltage range of 2.7V to 24V), the
LM6132/34 can be used for a diverse range of applications.
The system designer is thus able to choose a single device
type that serves many sub-circuits in the system, eliminating
the need to specify multiple devices in the bill of materials.
Along with its sister parts, the LM6142 and LM6152 that
have the same wide supply voltage capability, choice of the
LM6132 in a design eliminates the need to search for mul-
tiple sources for new designs.
DS012349-44
FIGURE 7.
LM6132/LM6134
www.national.com11
Physical Dimensions inches (millimeters) unless otherwise noted
8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC
Order Number LM6132AIM, LM6132BIM, LM6132AIMX or LM6132BIMX
NS Package Number M08A
14-Lead (0.300" Wide) Molded Small Outline Package, JEDEC
Order Number LM6134AIM, LM6134BIM, LM6134AIMX or LM6134BIMX
NS Package Number M14A
LM6132/LM6134
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
8-Lead (0.300" Wide) Molded Dual-In-Line Package
Order Number LM6132AIN, LM6132BIN
NS Package Number N08E
14-Lead (0.300" Wide) Molded Dual-In-Line Package
Order Number LM6134AIN, LM6134BIN
NS Package Number N14A
LM6132/LM6134
www.national.com13
Notes
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NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
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Tel: 1-800-272-9959
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Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
www.national.com
LM6132 Dual and LM6134 Quad, Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.