TL/H/12349
LM6132 Dual and LM6134 Quad, Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers
June 1996
LM6132 Dual and 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 pow-
er limitations previously made compromise necessary. With
only 360 mA/amp supply current, the 10 MHz gain-band-
width 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 exceed-
ing 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 applica-
tions, from battery operated systems with large bandwidth
requirements to high speed instrumentation.
Features (For 5V Supply, Typ Unless Noted)
YlRail-to-Rail input CMVR b0.25V to 5.25V
YRail-to-Rail output swing 0.01V to 4.99V
YHigh gain-bandwidth, 10 MHz at 20 kHz
YSlew rate 12 V/ms
YLow supply current 360 mA/Amp
YWide supply range 2.7V to over 24V
YCMRR 100 dB
YGain 100 dB with RLe10k
YPSRR 82 dB
Applications
YBattery operated instrumentation
YInstrumentation Amplifiers
YPortable scanners
YWireless communications
YFlat panel display driver
Connection Diagrams
8-Pin DIP/SO
TL/H/123491
Top View
14-Pin DIP/SO
TL/H/123492
Top View
Ordering Information
Package Temperature Range NSC Transport
Industrial, b40§Ctoa
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
C1996 National Semiconductor Corporation RRD-B30M66/Printed in U. S. A. http://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 (Va)a0.3V, (Vb)b0.3V
Supply Voltage (Va–Vb) 35V
Current at Input Pin g10 mA
Current at Output Pin (Note 3) g25 mA
Current at Power Supply Pin 50 mA
Lead Temp. (soldering, 10 sec.) 260§C
Storage Temperature Range b65§Ctoa
150§C
Junction Temperature (Note 4) 150§C
Operating Ratings (Note 1)
Supply Voltage 1.8V sVSs24V
Junction Temperature Range
LM6132, LM6134 b40§CsTJsa85§C
Thermal resistance (iJA)
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 TJe25§C, Vae
5.0V, Vbe0V, VCM eVOeVa/2 and RLl1MXto VS/2. Boldface limits apply at the temperature extremes
Symbol Parameter Conditions (Note 5)
Typ
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
VOS Input Offset Voltage 0.25 26mV
48max
TCVOS Input Offset Voltage 5mV/C
Average Drift
IBInput Bias Current 0V sVCM s5V 110 140 180 nA
300 350 max
IOS Input Offset Current 3.4 30 30 nA
50 50 max
RIN Input Resistance, CM 104 MX
CMRR Common Mode 0V sVCM s4V 100 75 75
Rejection Ratio 70 70
0V sVCM s5V 80 60 60 dB
55 55 min
PSRR Power Supply g2.5V sVSsg12V 82 78 78
Rejection Ratio 75 75
VCM Input Common-Mode b0.25 00
V
Voltage Range 5.25 5.0 5.0
AVLarge Signal RLe10k 100 25 15 V/mV
Voltage Gain 86min
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5.0V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJe25§C, Vae
5.0V, Vbe0V, VCM eVOeVa/2 and RLl1MXto VS/2. Boldface limits apply at the temperature extremes (Continued)
Symbol Parameter Conditions (Note 5)
Typ
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
VOOutput Swing 100k Load 4.992 4.98 4.98 V
4.93 4.93 min
0.007 0.017 0.017 V
0.019 0.019 max
10k Load 4.952 4.94 4.94 V
4.85 4.85 min
0.032 0.07 0.07 V
0.09 0.09 max
5k Load 4.923 4.90 4.90 V
4.85 4.85 min
0.051 0.095 0.095 V
0.12 0.12 max
ISC Output Short Circuit Sourcing 4.3 22
mA
Current min
Sinking 4.6 1.8 1.8 mA
min
ISSupply Current Per Amplifier 360 400 400 mA
450 450 max
5.0V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJe25§C, Vae
5.0V, Vbe0V, VCM eVOeVa/2 and RLl1MXto VS/2. Boldface limits apply at the temperature extremes
Symbol Parameter Conditions (Note 5)
Typ
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
SR Slew Rate g4V @VSeg6V 14 88V/ms
R
S
k
1kX77min
GBW Gain-Bandwidth Product f e20 kHz 10 7.4 7.4 MHz
77min
im Phase Margin RLe10k 33 deg
GmGain Margin RLe10k 10 dB
enInput Referred f e1 kHz 27 nV
0Hz
Voltage Noise
inInput Referred f e1 kHz 0.18 pA
0Hz
Current Noise
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2.7V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJe25§C, Vae
2.7V, Vbe0V, VCM eVOeVa/2 and RLl1MXto VS/2. Boldface limits apply at the temperature extreme
Symbol Parameter Conditions (Note 5)
Typ
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
VOS Input Offset Voltage 0.12 26mV
812max
IBInput Bias Current 0V sVCM s2.7V 90 nA
IOS Input Offset Current 2.8 nA
RIN Input Resistance 134 MX
CMRR Common Mode 0V sVCM s2.7V 82 dB
Rejection Ratio
PSRR Power Supply g1.35V sVSsg12V 80 dB
Rejection Ratio
VCM Input Common-Mode 2.7 2.7 V
Voltage Range 00
A
V
Large Signal RLe10k 100 V/mV
Voltage Gain
VOOutput Swing RLe10k 0.03 0.08 0.08 V
0.112 0.112 max
2.66 2.65 2.65 V
2.25 2.25 min
ISSupply Current Per Amplifier 330 mA
2.7V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJe25§C, Vae
2.7V, Vbe0V, VCM eVOeVa/2 and RLl1MXto VS/2.
Symbol Parameter Conditions (Note 5)
Typ
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
GBW Gain-Bandwidth Product RLe10k, f e20 kHz 7 MHz
imPhase Margin RLe10k 23 deg
GmGain Margin 12 dB
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24V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJe25§C, Vae
24V, Vbe0V, VCM eVOeVa/2 and RLl1MXto VS/2. Boldface limits apply at the temperature extreme
Symbol Parameter Conditions (Note 5)
Typ
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
VOS Input Offset Voltage 1.7 37mV
59max
IBInput Bias Current 0V sVCM s24V 125 nA
IOS Input Offset Current 4.8 nA
RIN Input Resistance 210 MX
CMRR Common Mode 0V sVCM s24V 80 dB
Rejection Ratio
PSRR Power Supply 2.7V sVSs24V 82 dB
Rejection Ratio
VCM Input Common-Mode b0.25 0 0 V min
Voltage Range 24.25 24 24 V max
AVLarge Signal RLe10k 102 V/mV
Voltage Gain
VOOutput Swing RLe10k 0.075 0.15 0.15 V
max
23.86 23.8 23.8 V
min
ISSupply Current Per Amplifier 390 450 450 mA
490 490 max
24V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJe25§C, Vae
24V, Vbe0V, VCM eVOeVa/2 and RLl1MXto VS/2.
Symbol Parameter Conditions (Note 5)
Typ
LM6134AI LM6134BI
Units
LM6132AI LM6132BI
Limit Limit
(Note 6) (Note 6)
GBW Gain-Bandwidth Product RLe10k, f e20 kHz 11 MHz
imPhase Margin RLe10k 23 deg
GmGain Margin RLe10k 12 dB
THD aN Total Harmonic AVea
1, VOe20VP-P 0.0015 %
Distortion and Noise f e10 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 kXin 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),iJA, and TA. The maximum allowable power dissipation at any ambient temperature is PDe
(TJ(max) bTA)/iJA. 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.
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Typical Performance Characteristics TAe25§C, RLe10 kXunless otherwise specified
Supply Voltage
Supply Current vs
TL/H/123493
Supply Voltage
Offset Voltage vs
TL/H/123495
dVOS vs VCM
TL/H/123496
dVOS vs VCM
TL/H/123497
dVOS vs VCM
TL/H/123498
Ibias vs VCM
TL/H/123499
Ibias vs VCM
TL/H/1234910
Ibias vs VCM
TL/H/1234911
Supply Voltage
Input Bias Current vs
TL/H/1234912
Frequency
Neg PSRR vs
TL/H/1234913
Frequency
Pos PSSR vs
TL/H/1234914
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Typical Performance Characteristics TAe25§C, RLe10 kXunless otherwise specified (Continued)
Output Voltage
dVOS vs
TL/H/1234915
Output Voltage
dVOS vs
TL/H/1234916
Output Voltage
dVOS vs
TL/H/1234917
CMRR vs Frequency
TL/H/1234918
Sinking Current
Output Voltage vs
TL/H/1234919
Sinking Current
Output Voltage vs
TL/H/1234920
Sinking Current
Output Voltage vs
TL/H/1234921
Sourcing Current
Output Voltage vs
TL/H/1234922
Sourcing Current
Output Voltage vs
TL/H/1234923
Output Voltage vs
Sourcing Current
TL/H/1234924
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Typical Performance Characteristics TAe25§C, RLe10 kXunless otherwise specified (Continued)
Frequency
Noise Voltage vs
TL/H/1234925
Frequency
Noise Current vs
TL/H/1234938
NF vs Source Resistance
TL/H/1234939
Frequency
Gain and Phase vs
TL/H/1234928
Frequency
Gain and Phase vs
TL/H/1234929
Frequency
Gain and Phase vs
TL/H/1234930
Voltage at 20 kHz
GBW vs Supply
TL/H/1234931
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LM6132/34 Application Hints
The LM6132 brings a new level of ease of use to opamp
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 opamps, the unique phase reversal pre-
vention/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 1
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 2
.)
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/ms.
Slew Rate vs Differential VIN
VSeg12V
TL/H/1234940
FIGURE 2
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
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 set-
tles rapidly.
TL/H/1234936
FIGURE 1
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LM6132/34 Application Hints
(Continued)
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
4
) above show the LM6132 driving a
500 pF load. In
Figure 3
, the lower trace is with no capaci-
tive load and the upper trace is with a 500 pF load. Here we
are operating on g12V supplies with a 20 Vp-p pulse. Ex-
cellent response is obtained with a Cfof 39 pF. In
Figure 4
,
the supplies have been reduced to g2.5V, the pulse is
4 Vp-p and Cfis 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 ca-
pacity, 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
capacitive load when the capacitor is placed across the
feedback resistor.
The circuit shown in
Figure 5
was used for these scope
photos.
TL/H/1234945
FIGURE 3
TL/H/1234942
FIGURE 4
TL/H/1234943
FIGURE 5
Figure 6
shows a method for compensating for load capaci-
tance (Co) effects by adding both an isolation resistor Ro at
the output and a feedback capacitor CFdirectly between
the output and the inverting input pin. Feedback capacitor
CFcompensates for the pole introduced by Roand Co, mini-
mizing ringing in the output waveform while the feedback
resistor RFcompensates for dc inaccuracies introduced by
Ro. Depending on the size of the load capacitance, the val-
ue of Rois typically chosen to be between 100Xto1kX.
TL/H/1234937
FIGURE 6
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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 sin-
gle 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 MXand 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.
TL/H/1234944
FIGURE 7
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 mA
per amplifier @5V) makes it an ideal choice for battery pow-
ered 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 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 Capaci-
tor-DAC type column (Source) drivers such as the LMC750X
series.
Since for VGA and SVGA displays, the buffered voltages
must settle within approximately 4 ms, 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 multi-
ple sources for new designs.
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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
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead (0.300×Wide) Molded Small Outline Package, JEDEC
Order Number LM6134AIM, LM6134BIM, LM6134AIMX or LM6134BIMX
NS Package Number M14A
8-Lead (0.300×Wide) Molded Dual-In-Line Package
Order Number LM6132AIN, LM6132BIN
NS Package Number N08E
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LM6132 Dual and LM6134 Quad, Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead (0.300×Wide) Molded Dual-In-Line Package
Order Number LM6134AIN, LM6134BIN
NS Package Number N14A
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