NSC LP124J Micropower quad operational amplifier Datasheet

LP124/LP2902/LP324 Micropower Quad
Operational Amplifier
General Description
Features
The LP124 series consists of four independent, high gain
internally compensated micropower operational amplifiers.
These amplifiers are specially suited for operation in battery
systems while maintaining good input specifications, and
extremely low supply current drain. In addition, the LP124
has an input common mode range, and output source range
which includes ground, making it ideal in single supply applications.
These amplifiers are ideal in applications which include portable instrumentation, battery backup equipment, and other
circuits which require good DC performance and low supply
current.
Y
Connection Diagram
Y
Y
Y
Y
Y
Y
Y
Low supply current
Low offset voltage
Low input bias current
Input common mode to GND
Interfaces to CMOS logic
Wide supply range
Small Outline Package available
Pin-for-pin compatible with LM124
125 mA (max)
2 mV (max)
4 nA (max)
3V k V a k 32V
Simplified Schematic
Dual-in-Line (J, N) and SO (M)
TL/H/8562–1
Order Number LP124J or LP324J
See NS Package Number J14A
Order Number LP324M or LP2902M
See NS Package Number M14A
TL/H/8562 – 2
Order Number LP324N or LP2902N
See NS Package Number N14A
C1996 National Semiconductor Corporation
TL/H/8562
RRD-B30M56/Printed in U. S. A.
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LP124/LP2902/LP324 Micropower Quad Operational Amplifier
February 1995
Absolute Maximum Ratings
Operating Conditions
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage
LP2902
Power Dissipation
(Note 3)
Tj Max
32V or g 16V
26V or g 13V
32V
26V
Differential Input Voltage
LP2902
Input Voltage (Note 1)
LP2902
ija
Operating Temp. Range
Storage Temp. Range
Soldering
Information (10 sec.)
Vapor Phase (60 sec.)
Infrared (15 sec.)
b 0.3V to 32V
b 0.3V to 26V
Output Short-Circuit to GND
(One Amplifier) (Note 2)
V a s 15V and TA e 25§ C
ESD Susceptibility (Note 9)
Continuous
Package
N
500 mW
J
500 mW
M
500 mW
150§ C
150§ C
150§ C
90§ C/W
90§ C/W 140§ C/W
(Note 4) (Note 4)
(Note 4)
b 65§ C s T s 150§ C
300§ C
260§ C
215§ C
220§ C
g 500V
Electrical Characteristics (Note 5)
LP124
Symbol
Parameter
Conditions
Tested
Typ Limit
(Note 6)
LP2902 (Note 8)
Design
Limit
(Note 7)
Tested
Typ Limit
(Note 6)
Design
Limit
(Note 7)
LP324
Tested
Typ Limit
(Note 6)
Design
Limit
(Note 7)
Units
Limits
Vos
Input Offset
Voltage
1
2
4
7
2
4
10
2
4
9
mV
(Max)
Ib
Input Bias
Current
1
4
8
8
2
20
40
2
10
20
nA
(Max)
Ios
Input Offset
Current
0.1
1
2
2
0.5
4
8
0.2
2
4
nA
(Max)
Avol
Voltage
Gain
RL e 10k
to GND
V a e 30V
100
70
60
60
70
40
30
100
50
40
V/mV
(Min)
CMRR
Common
Mode Rej.
Ratio
V a e 30V
100
0V s Vcm
Vcm k V a b 1.5
85
80
75
90
80
75
90
80
75
dB
(Min)
PSRR
Power
Supply Rej.
Ratio
V a e 5V to 30V 100
85
80
75
90
80
75
90
80
75
dB
(Min)
Is
Supply
Current
RL e %
85
125
150
200
85
150
250
85
150
250
mA
(Max)
Vo
Output
Voltage
Swing
IL e 350 mA
to GND.
Vcm e 0V
3.6
3.4
3.1
V a b1.9V 3.6
3.4
V a b1.9V 3.6
3.4
V a b1.9V
V
(Min)
0.7
0.8
1.0
1.0
0.7
0.8
1.0
0.7
0.8
1.0
V
(Max)
IL e 350 mA
to V a
Vcm e 0V
Iout
Output
Source Source
Current
Vo e 3V
Vin (diff) e 1V
11
9
4
4
10
7
4
10
7
4
mA
(Min)
Iout
Sink
Output
Sink
Current
Vo e 1.5V
Vin (diff) e 1V
6
5
4
4
5
4
3
5
4
3
mA
(Min)
Iout
Sink
Output
Sink
Current
Vo e 1.5V
Vcm e 0V
5
3
0.5
1.5
4
2
1
4
2
1
mA
(Min)
Isource
Output
Vin (diff) e 1V
Short to GND
20
25
35
35
20
25
35
35
20
25
35
35
mA
(Max)
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2
Electrical Characteristics (Note 5) (Continued)
LP124
Symbol
Parameter
Conditions
Typ
Isink
Output
Short to V a
Vin (diff) e 1V
15
LP2902 (Note 8)
LP324
Tested
Limit
(Note 6)
Design
Limit
(Note 7)
Typ
Tested
Limit
(Note 6)
Design
Limit
(Note 7)
Typ
Tested
Limit
(Note 6)
Design
Limit
(Note 7)
Units
Limits
30
40
45
15
30
45
15
30
45
mA
(Max)
Vos
Drift
7
10
10
mV/C§
Ios
Drift
5
10
10
pA/C§
Gain
Bandwidth
Product
100
100
100
KHz
Slew Rate
50
50
50
V/mS
GBW
Sr
Note 1: The input voltage is not allowed to go more than b 0.3V below Vb (GND) as this will turn on a parasitic transistor causing large currents to flow through the
device.
Note 2: Short circuits from the output to GND can cause excessive heating and eventual destruction. The maximum sourcing output current is approximately 30 mA
independent of the magnitude of V a . At values of supply voltage in excess of 15 VDC, continuous short-circuit to GND can exceed the power dissipation ratings
(particularly at elevated temperatures) and cause eventual destruction. Destructive dissipation can result from simultaneous shorts on all amplifiers.
Note 3: For operation at elevated temperatures, these devices must be derated based on a thermal resistance of ija and Tj max. Tj e TA a ijaPD.
Note 4: The LP124 may be operated from b 55§ C s TA s a 125§ C. The LP2902 may be operated from b 40§ C s TA s a 85§ C, and the LP324 may be operated
from 0§ C s TA s a 70§ C.
Note 5: Boldface numbers apply at temperature extremes. All other numbers apply only at TA e Tj e 25§ C, V a e 5V, Vcm e V/2, and RL e 100k
connected to GND unless otherwise specified.
Note 6: Guaranteed and 100% production tested.
Note 7: Guaranteed (but not 100% production tested) over the operating supply voltage range (3.0V to 32V for the LP124, LP324, and 3.0V to 26V for the LP2902),
and the common mode range (0V to V a b 1.5V), unless otherwise specified. These limits are not used to calculate outgoing quality levels.
Note 8: The LP2902 operating supply range is 3V to 26V, and is not tested above 26V.
Note 9: The test circuit used consists of the human body model of 100 pF in series with 1500X.
Typical Performance Curves
Input Voltage Range
Input Current
Supply Current
Voltage Gain
Open Loop
Frequency Response
Power Supply
Rejection Ratio
TL/H/8562 – 18
3
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Typical Performance Curves (Continued)
Voltage Follower
Pulse Response
Voltage Follower Pulse
Response (Small Signal)
Common Mode
Rejection Ratio
TL/H/8562 – 20
Large Signal
Frequency Response
Output Characteristics
Current Sourcing
Output Characteristics
Current Sinking
Current Limiting
TL/H/8562 – 19
Application Hints
test socket as an unlimited current surge through the resulting forward diode within the IC could destroy the unit.
Large differential input voltages can be easily accommodated and, as input differential voltage protection diodes are
not needed, no large input currents result from large differential input voltages. The differential input voltage may be
larger than V a without damaging the device. Protection
should be provided to prevent the input voltages from going
negative more than b0.3 VDC (at 25§ C). An input clamp
diode with a resistor to the IC input terminal can be used.
The amplifiers have a class B output stage which allows the
amplifiers to both source and sink output currents. In applications where crossover distortion is undesirable, a resistor
The LP124 series is a micro-power pin-for-pin equivalent to
the LM124 op amps. Power supply current, input bias current, and input offset current have all been reduced by a
factor of 10 over the LM124. Like its predecessor, the
LP124 series op amps can operate on single supply, have
true-differential inputs, and remain in the linear mode with
an input common-mode voltage of 0 VDC.
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 the unit is not inadvertently installed backwards in the
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4
Application Hints (Continued)
should be used from the output of the amplifier to ground.
The resistor biases the output into class A operation.
The LP124 has improved stability margin for driving capacitive loads. No special precautions are needed to drive loads
in the 50 pF to 1000 pF range. It should be noted however
that since the power supply current has been reduced by a
factor of 10, so also has the slew rate and gain bandwidth
product. This reduction can cause reduced performance in
AC applications where the LM124 is being replaced by an
LP124. Such situations usually occur when the LM124 has
been operated near its power bandwidth.
Output short circuits either to ground or to the positive power supply should be of short time duration. Units can be
destroyed, 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 excessive junction temperatures. For example: If all four amplifiers were simultaneously shorted to ground on a 10V supply
the junction temperature would rise by 110§ C.
Exceeding the negative common-mode limit on either input
will cause a reversal of phase to the output and force
the amplifier to the corresponding high or low state. Exceeding the negative common-mode limit on both inputs will
force the amplifier output to a high state. Exceeding the
positive common-mode limit on a single input will not
change the phase of the output. However, if both inputs
exceed the limit, the output of the amplifier will be forced to
a low state. In neither case does a latch occur since returning the input within the common mode range puts the input
stage and thus the amplifier in a normal operating mode.
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, introducing a pseudo-ground (a bias voltage reference to V a /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.
Driving CMOS
Comparator with Hysteresis
TL/H/8562 – 3
TL/H/8562 – 6
Non-Inverting Amplifier
Adder/Subtractor
TL/H/8562 – 4
TL/H/8562 – 7
Unity Gain Buffer
Positive Integrator
TL/H/8562 – 5
TL/H/8562 – 8
5
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Application Hints (Continued)
Differential Integrator
Howland Current Pump
TL/H/8562–9
TL/H/8562 – 10
m Power Current Source
Bridge Current Amplifier
TL/H/8562 – 12
TL/H/8562–11
Lowpass Filter
TL/H/8562 – 13
1 kHz Bandpass Active Filter
TL/H/8562 – 14
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6
Application Hints (Continued)
Band-Reject Filter
TL/H/8562 – 15
Pulse Generator
TL/H/8562 – 16
Window Comparator
TL/H/8562 – 17
7
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8
Physical Dimensions inches (millimeters) unless otherwise noted
Ceramic Dual-in-Line Package (J)
Order Number LP124J or LP324J
NS Package Number J14A
S.O. Package (M)
Order Number LP324M or LP2902M
NS Package Number M14A
9
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LP124/LP2902/LP324 Micropower Quad Operational Amplifier
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Lit. Ý 108468
Dual-in-Line Package (N)
Order Number LP324N or LP2902N
NS Package Number N14A
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