LM2902EP
Low Power Quad Operational Amplifiers
General Description
The LM2902 consists of four independent, high gain, inter-
nally frequency compensated operational amplifiers which
were designed specifically to operate from a single power
supply over a wide range of voltages. Operation from split
power supplies is also possible and the low power supply
current drain is independent of the magnitude of the power
supply voltage.
Application areas include transducer amplifiers, DC gain
blocks and all the conventional op amp circuits which now
can be more easily implemented in single power supply
systems. For example, the LM2902 can be directly operated
off of the standard +5V power supply voltage which is used
in digital systems and will easily provide the required inter-
face electronics without requiring the additional ±15V power
supplies.
ENHANCED PLASTIC
•Extended Temperature Performance of −40˚C to +85˚C
•Baseline Control - Single Fab & Assembly Site
•Process Change Notification (PCN)
•Qualification & Reliability Data
•Solder (PbSn) Lead Finish is standard
•Enhanced Diminishing Manufacturing Sources (DMS)
Support
Unique Characteristics
nIn the linear mode the input common-mode voltage
range includes ground and the output voltage can also
swing to ground, even though operated from only a
single power supply voltage
nThe unity gain cross frequency is temperature
compensated
nThe input bias current is also temperature compensated
Advantages
nEliminates need for dual supplies
nFour internally compensated op amps in a single
package
nAllows directly sensing near GND and V
OUT
also goes
to GND
nCompatible with all forms of logic
nPower drain suitable for battery operation
Features
nInternally frequency compensated for unity gain
nLarge DC voltage gain 100 dB
nWide bandwidth (unity gain) 1 MHz
(temperature compensated)
nWide power supply range:
Single supply 3V to 26V
or dual supplies ±1.5V to ±13V
nVery low supply current drain (700 µA) — essentially
independent of supply voltage
nLow input biasing current 45 nA
(temperature compensated)
nLow input offset voltage 2 mV
and offset current: 5 nA
nInput common-mode voltage range includes ground
nDifferential input voltage range equal to the power
supply voltage
nLarge output voltage swing 0V to V
+
− 1.5V
Applications
nSelected Military Applications
nSelected Avionics Applications
Ordering Information
PART NUMBER VID PART NUMBER NS PACKAGE NUMBER (Note 3)
LM2902MEP V62/04744-01 M14A
(Notes 1, 2) TBD TBD
Note 1: For the following (Enhanced Plastic) version, check for availability: LM2902MXEP, LM2902MTEP, LM2902MTXEP, LM2902NEP. Parts listed
with an "X" are provided in Tape & Reel and parts without an "X" are in Rails.
Note 2: FOR ADDITIONAL ORDERING AND PRODUCT INFORMATION, PLEASE VISIT THE ENHANCED PLASTIC WEB SITE AT: www.national.com/
mil
Note 3: Refer to package details under Physical Dimensions
February 2005
LM2902EP Low Power Quad Operational Amplifiers
© 2005 National Semiconductor Corporation DS201140 www.national.com
Connection Diagram
Dual-In-Line Package
20114001
Top View
See NS Package Number M14A or N14A
Schematic Diagram (Each Amplifier)
20114002
LM2902EP
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Absolute Maximum Ratings (Note 13)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage, V
+
26V
Differential Input Voltage 26V
Input Voltage −0.3V to +26V
Input Current
(V
IN
<−0.3V) (Note 6) 50 mA
Power Dissipation (Note 4)
Molded DIP 1130 mW
Small Outline Package 800 mW
Output Short-Circuit to GND
(One Amplifier) (Note 5)
V
+
≤15V and T
A
= 25˚C Continuous
Operating Temperature Range −40˚C to +85˚C
Storage Temperature Range −65˚C to +150˚C
Lead Temperature (Soldering, 10 seconds) 220˚C
Soldering Information
Small Outline Package
Vapor Phase (60 seconds) 215˚C
Infrared (15 seconds) 220˚C
ESD Tolerance (Note 14) 250V
Electrical Characteristics
V
+
= +5.0V, unless otherwise stated (Notes 7, 8)
Parameter Conditions LM2902 Units
Min Typ Max
Input Offset Voltage (Note 9) T
A
= 25˚C 2 7 mV
Input Bias Current (Note 10) I
IN(+)
or I
IN(−)
,V
CM
= 0V, T
A
= 25˚C 45 250 nA
Input Offset Current I
IN(+)
or I
IN(−)
,V
CM
= 0V, T
A
= 25˚C 5 50 nA
Input Common-Mode
Voltage Range (Note 11)
V
+
V
+
= 26V, T
A
= 25˚C 0V
+
−1.5 V
Supply Current Over Full Temperature Range
R
L
=∞On All Op Amps mA
V
+
= 26V) 1.5 3
V
+
= 5V 0.7 1.2
Large Signal V
+
= 15V, R
L
≥2kΩ, 25 100 V/mV
Voltage Gain (V
O
= 1V to 11V), T
A
= 25˚C
Common-Mode DC, V
CM
=0VtoV
+
− 1.5V, 50 70 dB
Rejection Ratio T
A
= 25˚C
Power Supply V
+
= 5V to 26V 50 100 dB
RejectionRatio T
A
= 25˚C
Amplifier-to-Amplifier f = 1 kHz to 20 kHz, T
A
= 25˚C −120 dB
Coupling (Note 12) (Input Referred)
Output
Current
Source V
IN+
= 1V, V
IN−
= 0V, 20 40
V
+
= 15V, V
O
= 2V, T
A
= 25˚C mA
Sink V
IN−
= 1V, V
IN+
= 0V, 10 20
V
+
= 15V, V
O
= 2V, T
A
= 25˚C
V
IN−
= 1V, V
IN+
= 0V, 12 50 µA
V
+
= 15V, V
O
= 200 mV, T
A
= 25˚C
LM2902EP
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Electrical Characteristics (Continued)
V
+
= +5.0V, unless otherwise stated (Notes 7, 8)
Parameter Conditions LM2902 Units
Min Typ Max
Short Circuit to Ground (Note 5) V
+
= 15V, T
A
= 25˚C 40 60 mA
Input Offset Voltage (Note 9) 10 mV
V
OS
Drift R
S
=0Ω7 µV/˚C
Input Offset Current I
IN(+)
−I
IN(−)
,V
CM
= 0V 45 200 nA
I
OS
Drift R
S
=0Ω10 pA/˚C
Input Bias Current I
IN(+)
or I
IN(−)
40 500 nA
Input Common-Mode
Voltage Range (Note 11)
V
+
= 26V 0V
+
−2 V
Large Signal Voltage Gain V
+
= +15V (V
O
Swing = 1V to 11V)
R
L
≥2kΩ15 V/mV
Output
Voltage
V
OH
V
+
= 26V R
L
=10kΩ23 24 V
Swing V
OL
V
+
= 5V, R
L
=10kΩ5 100 mV
Output
Current
Source V
O
=2V V
IN+
= +1V, 10 20
V
IN−
= 0V,
V
+
= 15V mA
Sink V
IN−
= +1V, 5 8
V
IN+
= 0V,
V
+
= 15V
Note 4: For operating at high temperatures, the LM2902EP must be derated based on a +125˚C maximum junction temperature and a thermal resistance of 88˚C/W
which applies for the device soldered in a printed circuit board, operating in a still air ambient. The dissipation is the total of all four amplifiers — use external resistors,
where possible, to allow the amplifier to saturate of to reduce the power which is dissipated in the integrated circuit.
Note 5: Short circuits from the output to V+can cause excessive heating and eventual destruction. When considering short circuits to ground, the maximum output
current is approximately 40 mA independent of the magnitude of V+. At values of supply voltage in excess of +15V, continuous short-circuits can exceed the power
dissipation ratings and cause eventual destruction. Destructive dissipation can result from simultaneous shorts on all amplifiers.
Note 6: This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP
transistors becoming forward biased and thereby acting as input diode clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action
on the IC chip. This transistor action can cause the output voltages of the op amps to go to the V+voltage level (or to ground for a large overdrive) for the time duration
that an input is driven negative. This is not destructive and normal output states will re-establish when the input voltage, which was negative, again returns to a value
greater than −0.3V (at 25˚C).
Note 7: The LM2902EP specifications are limited to −40˚C ≤TA≤+85˚C.
Note 8: "Testing and other quality control techniques are used to the extent deemed necessary to ensure product performance over the specified temperature
range. Product may not necessarily be tested across the full temperature range and all parameters may not necessarily be tested. In the absence of specific
PARAMETRIC testing, product performance is assured by characterization and/or design."
Note 9: VO.1.4V, RS=0Ωwith V+from 5V to 26V; and over the full input common-mode range (0V to V+− 1.5V)
Note 10: The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the output
so no loading change exists on the input lines.
Note 11: The input common-mode voltage of either input signal voltage should not be allowed to go negative by more than 0.3V (at 25˚C). The upper end of the
common-mode voltage range is V+− 1.5V (at 25˚C), but either or both inputs can go to +26V without damage, independent of the magnitude of V+.
Note 12: Due to proximity of external components, insure that coupling is not originating via stray capacitance between these external parts. This typically can be
detected as this type of capacitance increases at higher frequencies.
Note 13: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
Note 14: Human body model, 1.5 kΩin series with 100 pF.
Note 15: The LM124 within this data sheet’s graphics is referenced because of it’s a similarity to the LM2902, however is not offered in this data sheet.
LM2902EP
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Typical Performance Characteristics
Input Voltage Range Input Current
20114034 20114035
Supply Current Voltage Gain
20114036 20114037
Open Loop Frequency
Response
Common Mode Rejection
Ratio
20114038
20114039
LM2902EP
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Typical Performance Characteristics (Continued)
Voltage Follower Pulse
Response
Voltage Follower Pulse
Response (Small Signal)
20114040 20114041
Large Signal Frequency
Response
Output Characteristics
Current Sourcing
20114042 20114043
Output Characteristics
Current Sinking Current Limiting
20114044 20114045
LM2902EP
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Typical Performance Characteristics (Continued)
Input Current Voltage Gain
20114046 20114047
Application Hints
The LM2902EP is an op amp which operates with only a
single power supply voltage, has true-differential inputs, and
remains in the linear mode with an input common-mode
voltage of 0 V
DC
. This amplifier operates over a wide range
of power supply voltages with little change in performance
characteristics. At 25˚C amplifier operation is possible down
to a minimum supply voltage of 2.3 V
DC
.
The pinouts of the package have been designed to simplify
PC board layouts. Inverting inputs are adjacent to outputs for
all of the amplifiers and the outputs have also been placed at
the corners of the package (pins 1, 7, 8, and 14).
Precautions should be taken to insure that the power supply
for the integrated circuit never becomes reversed in polarity
or that the unit is not inadvertently installed backwards in a
test socket as an unlimited current surge through the result-
ing forward diode within the IC could cause fusing of the
internal conductors and result in a destroyed unit.
Large differential input voltages can be easily accommo-
dated and, as input differential voltage protection diodes are
not needed, no large input currents result from large differ-
ential input voltages. The differential input voltage may be
larger than V
+
without damaging the device. Protection
should be provided to prevent the input voltages from going
negative more than −0.3 V
DC
(at 25˚C). An input clamp diode
with a resistor to the IC input terminal can be used.
To reduce the power supply drain, the amplifier has a class A
output stage for small signal levels which converts to class B
in a large signal mode. This allows the amplifier to both
source and sink large output currents. Therefore both NPN
and PNP external current boost transistors can be used to
extend the power capability of the basic amplifier. The output
voltage needs to raise approximately 1 diode drop above
ground to bias the on-chip vertical PNP transistor for output
current sinking applications.
For ac applications, where the load is capacitively coupled to
the output of the amplifier, a resistor should be used, from
the output of the amplifier to ground to increase the class A
bias current and prevent crossover distortion.
Where the load is directly coupled, as in dc applications,
there is no crossover distortion.
Capacitive loads which are applied directly to the output of
the amplifier reduce the loop stability margin. Values of
50 pF can be accommodated using the worst-case non-
inverting unity gain connection. Large closed loop gains or
resistive isolation should be used if larger load capacitance
must be driven by the amplifier.
The bias network of the LM2902EP establishes a drain
current which is independent of the magnitude of the power
supply voltage over the range of from 3 V
DC
to 26 V
DC
.
Output short circuits either to ground or to the positive power
supply should be of short time duration. Units can be de-
stroyed, not as a result of the short circuit current causing
metal fusing, but rather due to the large increase in IC chip
dissipation which will cause eventual failure due to exces-
sive junction temperatures. Putting direct short-circuits on
more than one amplifier at a time will increase the total IC
power dissipation to destructive levels, if not properly pro-
tected with external dissipation limiting resistors in series
with the output leads of the amplifiers. The larger value of
output source current which is available at 25˚C provides a
larger output current capability at elevated temperatures
(see typical performance characteristics) than a standard IC
op amp.
The circuits presented in the section on typical applications
emphasize operation on only a single power supply voltage.
If complementary power supplies are available, all of the
standard op amp circuits can be used. In general, introduc-
ing a pseudo-ground (a bias voltage reference of V
+
/2) will
allow operation above and below this value in single power
supply systems. Many application circuits are shown which
take advantage of the wide input common-mode voltage
range which includes ground. In most cases, input biasing is
not required and input voltages which range to ground can
easily be accommodated.
LM2902EP
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Typical Single-Supply Applications (V
+
= 5.0 V
DC
) (Note 15)
Non-Inverting DC Gain (0V Input = 0V Output)
20114005
*R not needed due to temperature independent IIN
DC Summing Amplifier
(V
IN’S
≥0V
DC
and V
O
≥V
DC
) Power Amplifier
20114006
Where: V0=V
1+V
2−V
3−V
4
(V1+V
2)≥(V3+V
4) to keep VO>0V
DC
20114007
V0=0V
DC for VIN =0V
DC
AV=10
LM2902EP
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Typical Single-Supply Applications (V
+
= 5.0 V
DC
) (Note 15) (Continued)
Comparator with Hysteresis Ground Referencing a Differential Input Signal
20114020
20114021
VO=V
R
Voltage Controlled Oscillator Circuit
20114022
*Wide control voltage range: 0 VDC ≤VC≤2(V
+−1.5 VDC)
Photo Voltaic-Cell Amplifier
20114023
LM2902EP
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Physical Dimensions inches (millimeters) unless otherwise noted
MX S.O. Package (M)
NS Package Number M14A
Molded Dual-In-Line Package (N)
NS Package Number N14A
LM2902EP
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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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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.
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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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LM2902EP Low Power Quad Operational Amplifiers
