NSC LM748H, LM748CJ, LM748CH, LM748MW8, LM748MD8 Datasheet

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 com­patible with logic circuits.

The LM748C is specified for operation over the 0

§

Cto

a

70§C temperature range.

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
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

C

1995 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

§

Ctoa70C

Storage Temperature Range

b

65§Ctoa150§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

2kX

Input Offset Voltage R

S

s

10 kX 6.0 mV

Average Temperature R

S

s

50X 3.0 mV/§C

Coefficient of Input

R

S

s

10 kX

6.0 mV/

§

C

Offset Voltage

Input Offset Current T

A

e

0§Ctoa70§C 300 nA

T

A

eb

55§Ctoa125§C 500 nA

Input Bias Current T

A

e

0§Ctoa70§C 0.8 mA

T

A

eb

55§Ctoa125§C 1.5 mA

Supply Current T

A

ea

125§C, V

S

e

g

15V 1.2 2.25 mA

T

A

eb

55§Ctoa125§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

2kX

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

2kX

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 toa70§C.

Note 4: These specifications apply for

g

5VsV

S

s

a

15V and 0§CsT

A

s

a

70§C, unless otherwise specified.

2