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National Semiconductor
National Semiconductor

LM2924 Datasheet

Low Power Operational Amplifier/Voltage Comparator


LM2924 Datasheet Preview


April 1998
LM392/LM2924
Low Power Operational Amplifier/Voltage Comparator
General Description
The LM392 series consists of 2 independent building block
circuits. One is a high gain, internally frequency compen-
sated operational amplifier, and the other is a precision volt-
age comparator. Both the operational amplifier and the volt-
age comparator have been specifically designed to operate
from a single power supply over a wide range of voltages.
Both circuits have input stages which will common-mode in-
put down to ground when operating from a single power sup-
ply. Operation from split power supplies is also possible and
the low power supply current is independent of the magni-
tude of the supply voltage.
Application areas include transducer amplifier with pulse
shaper, DC gain block with level detector, VCO, as well as all
conventional operational amplifier or voltage comparator cir-
cuits. Both circuits can be operated directly from the stan-
dard 5 VDC power supply voltage used in digital systems,
and the output of the comparator will interface directly with
either TTL or CMOS logic. In addition, the low power drain
makes the LM392 extremely useful in the design of portable
equipment.
Advantages
n Eliminates need for dual power supplies
n An internally compensated op amp and a precision
comparator in the same package
n Allows sensing at or near ground
n Power drain suitable for battery operation
n Pin-out is the same as both the LM358 dual op amp and
the LM393 dual comparator
Features
n Wide power supply voltage range
Single supply: 3V to 32V
Dual supply: ±1.5V to ±16V
n Low supply current drain — essentially independent of
supply voltage: 600 µA
n Low input biasing current: 50 nA
n Low input offset voltage: 2 mV
n Low input offset current: 5 nA
n Input common-mode voltage range includes ground
n Differential input voltage range equal to the power
supply voltage
ADDITIONAL OP AMP FEATURES
n Internally frequency compensated for unity gain
n Large DC voltage gain: 100 dB
n Wide bandwidth (unity gain): 1 MHz
n Large output voltage swing: 0V to V+ − 1.5V
ADDITIONAL COMPARATOR FEATURES
n Low output saturation voltage: 250 mV at 4 mA
n Output voltage compatible with all types of logic systems
Connection Diagram
(Amplifier A = Comparator)
(Amplifier B = Operational Amplifier)
Dual-In-Line Package
DS007793-1
(Top View)
Order Number LM392M or LM2924M
See NS Package Number M08A
Order Number LM392N or LM2924N
See NS Package Number N08E
© 1999 National Semiconductor Corporation DS007793
www.national.com
Page 1

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
LM392
LM2924
Supply Voltage, V+
32V or ±16V
26V or ±13V
Differential Input Voltage
32V 26V
Input Voltage
−0.3V to +32V
−0.3V to +26V
Power Dissipation (Note 2)
Molded DIP (LM392N, LM2924N)
820 mW
820 mW
Small Outline Package (LM392M, LM2924M)
530 mW
530 mW
Output Short-Circuit to Ground (Note 3)
Input Current (VIN < −0.3 VDC) (Note 4)
Operating Temperature Range
Continuous
50 mA
0˚C to +70˚C
Continuous
50 mA
−40˚C to +85˚C
Storage Temperature Range
−65˚C to +150˚C
−65˚C to +150˚C
Lead Temperature (Soldering, 10 seconds)
260˚C
260˚C
ESD rating to be determined.
Soldering Information
Dual-in-Line Package
Soldering (10 seconds)
260˚C
260˚C
Small Outline Package
Vapor Phase (60 seconds)
215˚C
215˚C
Infrared (15 seconds)
220˚C
220˚C
See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” for other methods of soldering
surface mount devices.
Electrical Characteristics
(V+ = 5 VDC; specifications apply to both amplifiers unless otherwise stated) (Note 5)
Parameter
Conditions
LM392
Min Typ Max
Input Offset Voltage
Input Bias Current
Input Offset Current
Input Common-Mode Voltage
Range
TA = 25˚C, (Note 6)
IN(+) or IN(−), TA =25˚C,
(Note 7) , VCM = 0V
IN(+) − IN(−), TA = 25˚C
V+ = 30 VDC, TA = 25˚C,
(Note 8) (LM2924,
±2 ±5
50 250
±5 ±50
0 V+−1.5
Supply Current
V+ = 26 VDC)
RL = , V+ = 30V,
(LM2924, V+ = 26V)
12
Supply Current
Amplifier-to-Amplifier Coupling
RL = , V+ = 5V
f = 1 kHz to 20 kHz,
0.5 1
TA = 25˚C, Input Referred,
(Note 9)
−100
Input Offset Voltage
(Note 6)
±7
Input Bias Current
IN(+) or IN(−)
400
Input Offset Current
IN(+) − IN(−)
150
Input Common-Mode Voltage
Range
Differential Input Voltage
V+ = 30 VDC, (Note 8)
(LM2924, V+ = 26 VDC)
Keep All VIN’s 0 VDC
(or V, if Used), (Note 10)
0
V+−2
32
LM2924
Min Typ Max
±2 ±7
50 250
±5 ±50
0 V+−1.5
12
0.5 1
−100
±10
500
200
0 V+−2
26
Units
mV
nA
nA
V
mA
mA
dB
mV
nA
nA
V
V
www.national.com
2
Page 2

Electrical Characteristics (Continued)
(V+ = 5 VDC; specifications apply to both amplifiers unless otherwise stated) (Note 5)
Parameter
Conditions
LM392
Min Typ Max
OP AMP ONLY
Large Signal Voltage Gain
Output Voltage Swing
Common-Mode Rejection
Ratio
Power Supply Rejection Ratio
Output Current Source
Output Current Sink
Input Offset Voltage Drift
Input Offset Current Drift
COMPARATOR ONLY
V+ = 15 VDC, Vo swing =
1 VDC to 11 VDC,
RL = 2 k, TA = 25˚C
RL = 2 k, TA = 25˚C,
(LM2924, RL 10 k)
DC, TA = 25˚C, VCM =
0 VDC to V+−1.5 VDC
DC, TA = 25˚C
VIN(+) = 1 VDC,
VIN(−) = 0 VDC,
V+ = 15 VDC, Vo =
2 VDC, TA = 25˚C
VIN(−) = 1 VDC,
VIN(+) = 0 VDC,
V+ = 15 VDC, Vo =
2 VDC, TA = 25˚C
VIN(−) = 1 VDC,
VIN(+) = 0 VDC,
V+ = 15 VDC, Vo =
200 mV, TA = 25˚C
RS = 0
RS = 0
25 100
0 V+−1.5
65 70
65 100
20 40
10 20
12 50
7
10
Voltage Gain
Large Signal Response Time
Response Time
Output Sink Current
Saturation Voltage
Output Leakage Current
RL 15 k, V+ = 15 VDC,
TA = 25˚C
VIN = TTL Logic Swing,
VREF = 1.4 VDC
VRL = 5 VDC, RL = 5.1 k,
TA = 25˚C
VRL = 5 VDC, RL = 5.1 k,
TA = 25˚C, (Note 11)
VIN(−) = 1 VDC,
VIN(+) = 0 VDC,
Vo 1.5 VDC, TA = 25˚C
VIN(−) 1 VDC,
VIN(+) = 0,
ISINK 4 mA, TA = 25˚C
VIN(−) 1 VDC,
VIN(+) = 0,
ISINK 4 mA
VIN(−) = 0,
VIN(+) 1 VDC,
Vo = 5 VDC, TA = 25˚C
VIN(−) = 0,
VIN(+) 1 VDC,
Vo = 30 VDC
50 200
300
1.3
6 16
250 400
700
0.1
1.0
LM2924
Min Typ Max
25 100
0 V+−1.5
50 70
50 100
20 40
10 20
12 50
7
10
25 100
300
1.5
6 16
400
700
0.1
1.0
Units
V/mV
V
dB
dB
mA
mA
µA
µV/˚C
pADC/˚C
V/mV
ns
µs
mA
mV
mV
nA
µA
3 www.national.com
Page 3
Part Number LM2924
Manufactur National Semiconductor
Description Low Power Operational Amplifier/Voltage Comparator
Total Page 6 Pages
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