LM124/LM224/LM324/LM2902

Low Power Quad Operational Amplifiers

General Description

The LM124 series consists of four independent, high gain,

internally frequency compensated operational amplifiers

which were designed specifically to operate from a single

power supply over a wide range of voltages. Operation from

split power supplies is also possible and the low power sup-

ply current drain is independent of the magnitude of the

power supply voltage.

Application areas include transducer amplifiers, DC gain

blocks and all the conventional op amp circuits which now

can be more easily implemented in single power supply sys-

tems. For example, the LM124 series can be directly oper-

ated off of the standard +5V power supply voltage which is

used in digital systems and will easily provide the required

power supplies.

Unique Characteristics

n

In the linear mode the input common-mode voltage

range includes ground and the output voltage can also

swing to ground, even though operated from only a

single power supply voltage

n

The unity gain cross frequency is temperature

compensated

n

The input bias current is also temperature compensated

Advantages

n

Eliminates need for dual supplies

n

Four internally compensated op amps in a single

package

n

Allows directly sensing near GND and V

to GND

n

Compatible with all forms of logic

n

Power drain suitable for battery operation

Features

n

Internally frequency compensated for unity gain

n

Large DC voltage gain

100 dB

n

Wide bandwidth (unity gain)

1 MHz

(temperature compensated)

n

Wide power supply range:

Single supply

3V to 32V

or dual supplies

n

Very low supply current drain (700 µA) — essentially

independent of supply voltage

n

Low input biasing current

45 nA

(temperature compensated)

n

Low input offset voltage

2 mV

and offset current:

5 nA

n

Input common-mode voltage range includes ground

n

Differential input voltage range equal to the power

supply voltage

n

Large output voltage swing

0V to V

Connection Diagram

Note 1: LM124A available per JM38510/11006

Note 2: LM124 available per JM38510/11005

Dual-In-Line Package

DS009299-1

Top View

Order Number LM124J, LM124AJ, LM124J/883 (Note 2), LM124AJ/883 (Note 1), LM224J,

LM224AJ, LM324J, LM324M, LM324MX, LM324AM, LM324AMX, LM2902M, LM2902MX, LM324N, LM324AN,

LM324MT, LM324MTX or LM2902N LM124AJRQML and LM124AJRQMLV(Note 3)

See NS Package Number J14A, M14A or N14A

August 2000

© 2000 National Semiconductor Corporation

DS009299

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