LM6132,LM6134
LM6132/LM6134 Dual and Quad Low Power 10 MHz Rail-to-Rail I/O Operational
Amplifiers
Literature Number: SNOS751C
LM6132/LM6134
Dual and Quad Low Power 10 MHz Rail-to-Rail I/O
Operational Amplifiers
General Description
The LM6132/34 provides new levels of speed vs. power
performance 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 applications
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 op-
erating 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
8-Pin DIP/SO 14-Pin DIP/SO
01234901
Top View
01234902
Top View
Ordering Information
Package Temperature Range Transport NSC
Industrial, −40˚C to +85˚C Media Drawing
8-Pin Molded DIP LM6132AIN, LM6132BIN Rails N08E
8-Pin Small Outline LM6132AIM, LM6132BIM Rails M08A
LM6132AIMX, LM6132BIMX Tape and Reel M08A
14-Pin Molded DIP LM6134AIN, LM6134BIN Rails N14A
14-Pin Small Outline LM6134AIM, LM6134BIM Rails M14A
LM6134AIMX, LM6134BIMX Tape and Reel M14A
November 2004
LM6132 and LM6134 Dual and Quad, Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers
© 2004 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
+
≤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
>1MΩto V
+
/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
4
6
8
mV
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 MΩ
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
+
≤±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
8
15
6
V/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
LM6132/LM6134
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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
>1MΩto V
+
/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
LM6132
Sourcing 4 2
2
2
1
mA
min
Sinking 3.5 1.8
1.8
1.8
1
mA
min
I
SC
Output Short Circuit Current
LM6134
Sourcing 3 2
1.6
2
1
mA
min
Sinking 3.5 1.8
1.3
1.8
1
mA
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
>1MΩto V
+
/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
<1kΩ77min
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
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
>1MΩto V
+
/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 MΩ
CMRR Common Mode 0V ≤V
CM
≤2.7V 82 dB
Rejection Ratio
PSRR Power Supply ±1.35V ≤V
+
≤±12V 80 dB
LM6132/LM6134
www.national.com3
2.7V DC Electrical Characteristics (Continued)
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
>1MΩto V
+
/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)
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
>1MΩto V
+
/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=20kHz 7 MHz
θ
m
Phase Margin R
L
= 10k 23 deg
G
m
Gain Margin 12 dB
LM6132/LM6134
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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
>1MΩto V
+
/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 MΩ
CMRR Common Mode 0V ≤V
CM
≤24V 80 dB
Rejection Ratio
PSRR Power Supply 2.7V ≤V
+
≤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
>1MΩto V
+
/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=20kHz 11 MHz
θ
m
Phase Margin R
L
= 10k 23 deg
G
m
Gain Margin R
L
= 10k 12 dB
THD + N Total 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
intended 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 kΩin 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=
(TJ(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
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Typical Performance Characteristics T
A
= 25˚C, R
L
=10kΩunless otherwise specified
Supply Current vs. Supply Voltage Offset Voltage vs. Supply Voltage
01234903 01234905
dV
OS
vs. V
CM
dV
OS
vs. V
CM
01234906 01234907
dV
OS
vs. V
CM
I
BIAS
vs. V
CM
01234908 01234909
LM6132/LM6134
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Typical Performance Characteristics T
A
= 25˚C, R
L
=10kΩunless otherwise specified (Continued)
I
BIAS
vs. V
CM
I
BIAS
vs. V
CM
01234910 01234911
Input Bias Current vs. Supply Voltage Negative PSRR vs. Frequency
01234912 01234913
Positive PSSR vs. Frequency dV
OS
vs. Output Voltage
01234914 01234915
LM6132/LM6134
www.national.com7
Typical Performance Characteristics T
A
= 25˚C, R
L
=10kΩunless otherwise specified (Continued)
dV
OS
vs. Output Voltage dV
OS
vs. Output Voltage
01234916 01234917
CMRR vs. Frequency Output Voltage vs. Sinking Current
01234918 01234919
Output Voltage vs. Sinking Current Output Voltage vs. Sinking Current
01234920 01234921
LM6132/LM6134
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Typical Performance Characteristics T
A
= 25˚C, R
L
=10kΩunless otherwise specified (Continued)
Output Voltage vs. Sourcing Current Output Voltage vs. Sourcing Current
01234922 01234923
Output Voltage vs. Sourcing Current Noise Voltage vs. Frequency
01234924 01234925
Noise Current vs. Frequency NF vs. Source Resistance
01234938 01234939
LM6132/LM6134
www.national.com9
Typical Performance Characteristics T
A
= 25˚C, R
L
=10kΩunless otherwise specified (Continued)
Gain and Phase vs. Frequency Gain and Phase vs. Frequency
01234928 01234929
Gain and Phase vs. Frequency GBW vs. Supply Voltage at 20 kHz
01234930 01234931
LM6132/LM6134
www.national.com 10
LM6132/34 Application Information
The LM6132 brings a new level of ease of use to op amp
system 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 op amps, 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.
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
additional transistors, (Q5, Q6), directly into the current mir-
rors.
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 op amp reacts better than a
conventional op amp. Large fast pulses will raise the slew-
rate to around 25V to 30 V/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
driving large capacitive loads.
DRIVING CAPACITIVE LOADS
Capacitive loads decrease the phase margin of all op amps.
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 op amps with a
fixed maximum slew-rate will lag further and further behind
when driving capacitive loads even though the differential
input voltage raises. With the LM6132, the lag causes the
slew rate to raise. The increased slew-rate keeps the output
following the input much better. This effectively reduces
phase lag. After the output has caught up with the input, the
differential 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
driving a 500 pF load. In Figure 3 , the lower trace is with no
capacitive load and the upper trace is with a 500 pF load.
Here we are operating on ±12V supplies with a 20 V
PP
pulse. Excellent 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 V
PP
and C
F
is 39 pF. The best value for the
compensation capacitor should be established after the
board layout is finished because the value is dependent on
board stray capacity, the value of the feedback resistor, the
closed loop gain and, to some extent, the supply voltage.
Another effect that is common to all op amps is the phase
shift caused by the feedback resistor and the input capaci-
tance. This phase shift also reduces phase margin. This
effect is taken care of at the same time as the effect of the
capacitive load when the capacitor is placed across the
feedback resistor.
The circuit shown in Figure 5 was used for these scope
photos.
Slew Rate vs. Differential V
IN
V
S
=±12V
01234940
FIGURE 1.
01234936
FIGURE 2.
LM6132/LM6134
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LM6132/34 Application Information
(Continued)
Figure 6 shows a method for compensating for load capaci-
tance (C
O
) effects by adding both an isolation resistor R
O
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
, mini-
mizing ringing in the output waveform while the feedback
resistor 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 100Ωto1kΩ.
Typical Applications
3 OP AMP INSTRUMENTATION AMP WITH
RAIL-TO-RAIL INPUT AND OUTPUT
Using the LM6134,a3opampinstrumentation 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
input 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
differential stage (Figure 7). These buffers assure that the
input impedance is over 100 MΩand they eliminate the
requirement 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.
01234945
FIGURE 3.
01234942
FIGURE 4.
01234943
FIGURE 5.
01234937
FIGURE 6.
01234944
FIGURE 7.
LM6132/LM6134
www.national.com 12
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 µA per
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
capacitive drive capability of the LM6132 comes in very
handy in driving highly capacitive loads that are characteris-
tic 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
reference 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
amplifier’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.
LM6132/LM6134
www.national.com13
Physical Dimensions inches (millimeters)
unless otherwise noted
8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC
NS Package Number M08A
14-Lead (0.300" Wide) Molded Small Outline Package, JEDEC
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
NS Package Number N08E
14-Lead (0.300" Wide) Molded Dual-In-Line Package
NS Package Number N14A
LM6132/LM6134
www.national.com15
Notes
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.
For the most current product information visit us at www.national.com.
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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
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(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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LM6132 and LM6134 Dual and Quad, Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers
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