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LM748 Operational Amplifier
LM748 Operational Amplifier
November 1994
General Description
The LM748 is a general purpose operational amplifier with
external frequency compensation.
The unity-gain compensation specified makes the circuit
stable for all feedback configurations, even with capacitive
loads. It is possible to optimize compensation for best high
frequency performance at any gain. As a comparator, the
output can be clamped at any desired level to make it compatible with logic circuits.
The LM748C is specified for operation over the 0
a
70§C temperature range.
Cto
§
Connection Diagram
Dual-In-Line Package
Top View
Order Number LM748CN
See NS Package Number N08B
Features
Y
Frequency compensation with a single 30 pF capacitor
Y
Operation fromg5V tog20V
Y
Continuous short-circuit protection
Y
Operation as a comparator with differential inputs as
g
high as
Y
No latch-up when common mode range is exceeded
Y
Same pin configuration as the LM101
30V
TL/H/11478– 2
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
TL/H/11478
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Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage
g
22V
Power Dissipation (Note 1) 500 mW
g
Differential Input Voltage
30V
Input Voltage (Note 2)
Output Short-Circuit Duration (Note 3)
Operating Temperature Range:
LM748C 0
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
b
65§Ctoa150§C
g
Ctoa70C
§
a
300§C
15V
Electrical Characteristics (Note 4)
Parameter Conditions Min Typ Max Units
Input Offset Voltage T
Input Offset Current T
Input Bias Current T
Input Resistance T
Supply Current T
Large Signal T
Voltage Gain V
Input Offset Voltage R
Average Temperature R
Coefficient of Input
Offset Voltage
Input Offset Current T
Input Bias Current T
Supply Current T
Large Signal V
Voltage Gain R
Output Voltage V
Swing
Input Voltage Range V
Common-Mode R
Rejection Ratio
Supply Voltage R
Rejection Ratio
Note 1: For operating at elevated temperatures, the device must be derated based on a maximum junction to case thermal resistance of 45§C per watt, or 150§C
per watt junction to ambient. (See Curves).
Note 2: For supply voltages less than
Note 3: Continuous short circuit is allowed for case temperatures to
Note 4: These specifications apply for
e
A
e
A
e
A
e
A
e
A
e
A
OUT
s
S
s
S
s
R
S
e
A
eb
T
A
e
A
eb
T
A
ea
A
eb
T
A
e
S
t
2kX
L
e
S
e
V
S
e
S
s
10 kX
S
s
10 kX
S
g
15V, the absolute maximum input voltage is equal to the supply voltage.
s
g
5VsV
S
s
25§C, R
10 kX 1.0 5.0 mV
S
25§C 40 200 nA
25§C 120 500 nA
25§C 300 800 kX
e
g
10V, R
g
15V 1.8 2.8 mA
S
e
g
15V
S
t
2kX
L
50 160 V/mV
25§C, V
25§C, V
e
10 kX 6.0 mV
50X 3.0 mV/§C
10 kX
6.0 mV/
0§Ctoa70§C 300 nA
55§Ctoa125§C 500 nA
0§Ctoa70§C 0.8 mA
55§Ctoa125§C 1.5 mA
e
125§C, V
g
15V 1.2 2.25 mA
S
55§Ctoa125§C 1.9 3.3 mA
OUT
L
L
e
e
e
g
10 kX
2kX
10V
25 V/mV
g
12
g
10
g
12 V
g
14 V
g
13 V
g
15V, V
g
15V, R
g
15V, R
g
15V
70 90 dB
77 90 dB
a
125§C and ambient temperatures toa70§C.
a
15V and 0§CsT
s
a
70§C, unless otherwise specified.
A
C
§
2
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Typical Applications
Inverting Amplifier with Balancing Circuit
²
May be zero or equal to parallel TL/H/11478– 3
combination of R1 and R2 for minimum offset.
Voltage Comparator for Driving
RTL Logic or High Current Driver
Voltage Comparator for Driving
DTL or TTL Integrated Circuits
TL/H/11478– 4
TL/H/11478– 5
Guaranteed Performance Characteristics (Note 4)
Input Voltage Range Output Swing Voltage Gain
3
TL/H/11478– 6
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Typical Performance Characteristics
Supply Current Voltage Gain Input Bias Current
Current Limiting Input Current Dissipation
Open Loop
Frequency Response
Large Signal
Frequency Response
Maximum Power
Voltage Follower
Pulse Response
TL/H/11478– 7
4
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5
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Physical Dimensions inches (millimeters)
LM748 Operational Amplifier
Dual-In-Line Package (N)
Order Number LM748CN
NS Package Number N08E
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with instructions for use provided in the labeling, can effectiveness.
be reasonably expected to result in a significant injury
to the user.
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