9 Detailed Description

9.1 Overview

The LM2904-Q1 and LM2904B-Q1 devices consist of two independent, high-gain frequency-compensated

operational amplifiers designed 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 within the supply voltage range

supply-current drain is 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 implemented more easily in single-supply-voltage systems. For example, these devices

can be operated directly from the standard 5-V supply used in digital systems and easily can provide the

required interface electronics without additional ±5-V supplies.

9.2 Functional Block Diagram

~100 µA

Curren t

Regula tor

~6 µA

Curren t

Regula tor

IN-

IN+

OUT

~6 µA

Curren t

Regula tor

~120 µA

Curren t

Regula tor

LM2904-Q1, LM2904B-Q1

SLOS414J – MAY 2003 – REVISED FEBRUARY 2021

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