TL H 11478
LM748
Operational
Amplifier
November 1994
LM748 Operational Amplifier
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 com-
patible with logic circuits
The LM748C is specified for operation over the 0 C to
a
70 C temperature range
Features
Y
Frequency compensation with a single 30 pF capacitor
Y
Operation from
g
5V to
g
20V
Y
Continuous short-circuit protection
Y
Operation as a comparator with differential inputs as
high as
g
30V
Y
No latch-up when common mode range is exceeded
Y
Same pin configuration as the LM101
Connection Diagram
Dual-In-Line Package
TL H 11478 2
Top View
Order Number LM748CN
See NS Package Number N08B
C1995 National Semiconductor Corporation
RRD-B30M115 Printed in U S A
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
Differential Input Voltage
g
30V
Input Voltage (Note 2)
g
15V
Output Short-Circuit Duration (Note 3)
Operating Temperature Range
LM748C
0 C to
a
70C
Storage Temperature Range
b
65 C to
a
150 C
Lead Temperature (Soldering 10 sec )
a
300 C
Electrical Characteristics
(Note 4)
Parameter
Conditions
Min
Typ
Max
Units
Input Offset Voltage
T
A
e
25 C R
S
s
10 kX
1 0
5 0
mV
Input Offset Current
T
A
e
25 C
40
200
nA
Input Bias Current
T
A
e
25 C
120
500
nA
Input Resistance
T
A
e
25 C
300
800
kX
Supply Current
T
A
e
25 C V
S
e
g
15V
1 8
2 8
mA
Large Signal
T
A
e
25 C V
S
e
g
15V
50
160
V mV
Voltage Gain
V
OUT
e
g
10V R
L
t
2 kX
Input Offset Voltage
R
S
s
10 kX
6 0
mV
Average Temperature
R
S
s
50X
3 0
m
V C
Coefficient of Input
R
S
s
10 kX
6 0
m
V C
Offset Voltage
Input Offset Current
T
A
e
0 C to
a
70 C
300
nA
T
A
e b
55 C to
a
125 C
500
nA
Input Bias Current
T
A
e
0 C to
a
70 C
0 8
m
A
T
A
e b
55 C to
a
125 C
1 5
m
A
Supply Current
T
A
e a
125 C V
S
e
g
15V
1 2
2 25
mA
T
A
e b
55 C to
a
125 C
1 9
3 3
mA
Large Signal
V
S
e
g
15V V
OUT
e
g
10V
25
V mV
Voltage Gain
R
L
t
2 kX
Output Voltage
V
S
e
g
15V R
L
e
10 kX
g
12
g
14
V
Swing
V
S
e
g
15V R
L
e
2 kX
g
10
g
13
V
Input Voltage Range
V
S
e
g
15V
g
12
V
Common-Mode
R
S
s
10 kX
70
90
dB
Rejection Ratio
Supply Voltage
R
S
s
10 kX
77
90
dB
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
g
15V the absolute maximum input voltage is equal to the supply voltage
Note 3
Continuous short circuit is allowed for case temperatures to
a
125 C and ambient temperatures to
a
70 C
Note 4
These specifications apply for
g
5V
s
V
S
s a
15V and 0 C
s
T
A
s a
70 C unless otherwise specified
2
Typical Applications
Inverting Amplifier with Balancing Circuit
May be zero or equal to parallel
TL H 11478 3
combination of R1 and R2 for minimum offset
Voltage Comparator for Driving
DTL or TTL Integrated Circuits
TL H 11478 4
Voltage Comparator for Driving
RTL Logic or High Current Driver
TL H 11478 5
Guaranteed Performance Characteristics
(Note 4)
Input Voltage Range
Output Swing
Voltage Gain
TL H 11478 6
3
Typical Performance Characteristics
Supply Current
Voltage Gain
Input Bias Current
Current Limiting
Input Current
Dissipation
Maximum Power
Frequency Response
Open Loop
Frequency Response
Large Signal
Pulse Response
Voltage Follower
TL H 11478 7
4
5
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