7 Detailed Description

7.1 Overview

The LM2902-Q1, LM2902B-Q1, and LM2902BA-Q1 devices consist of four 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, and VS is at least 1.5V more positive than the input common-mode voltage. The low 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 5V supply used in digital systems and easily can provide the required

interface electronics without additional ±5V supplies.

7.2 Functional Block Diagram

Schematic (Each Amplifier)

7.3 Feature Description

7.3.1 Input Common-Mode Range

The valid common-mode range is from device ground to VS – 1.5V (VS – 2V across temperature). Inputs

may exceed VS up to the maximum VS without device damage. At least one input must be in the valid input

common-mode range for the output to be the correct phase. If both inputs exceed the valid range, then the

output phase is undefined. If either input more than 0.3V below V– then input current should be limited to 1mA

and the output phase is undefined.

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LM2902-Q1, LM2902B-Q1, LM2902BA-Q1

SGLS178I – AUGUST 2003 – REVISED NOVEMBER 2024

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Product Folder Links: LM2902-Q1 LM2902B-Q1 LM2902BA-Q1