To Other

Amplifiers

≈6- A

µ

Current

Regulator

OUT

GND

IN−

IN+

≈100- A

µ

Current

Regulator

≈50- A

µ

Current

Regulator

COMPONENT COUNT

(total device)

Epi-FET

Transistors

Diodes

Resistors

Capacitors

1

95

4

11

4

≈6- A

µ

Current

Regulator

†

†

LM224K, LM224KA, LM324, LM324A, LM324K, LM324KA, LM2902

LM124, LM124A, LM224, LM224A, LM2902V, LM2902K, LM2902KV, LM2902KAV

SLOS066W – SEPTEMBER 1975 – REVISED MARCH 2015

www.ti.com

8 Detailed Description

8.1 Overview

These devices consist of four independent high-gain frequency-compensated operational amplifiers that are

designed specifically to operate from a single supply over a wide range of voltages. Operation from split supplies

also is possible if the difference between the two supplies is 3 V to 32 V (3 V to 26 V for the LM2902 device),

independent of the magnitude of the supply voltage.

Applications include transducer amplifiers, DC amplification blocks, and all the conventional operational-amplifier

circuits that now can be more easily implemented in single-supply-voltage systems. For example, the LM124

device can be operated directly from the standard 5-V supply that is used in digital systems and provides the

required interface electronics, without requiring additional ±15-V supplies.

8.2 Functional Block Diagram

10

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Product Folder Links: LM224K LM224KA LM324 LM324A LM324K LM324KA LM2902 LM124 LM124A LM224

LM224A LM2902V LM2902K LM2902KV LM2902KAV