OPA182 datasheet(18/43 Pages) TI

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8 Detailed Description

8.1 Overview

The OPAx182 family of operational amplifiers combine precision offset and drift with excellent overall

performance, making these devices a great choice for many precision applications. The precision offset drift

of only 0.005 µV/°C provides stability over the entire temperature range. In addition, these devices offer

excellent linear performance with high CMRR, PSRR, and AOL. As with all amplifiers, applications with noisy

or high-impedance power supplies require decoupling capacitors close to the device pins. In most cases, 0.1-µF

capacitors are adequate. See the Layout Guidelines section for details and a layout example.

The OPAx182 are zero-drift, MUX-friendly, rail-to-rail output operational amplifiers. The devices operate from

4.5 V to 36 V, are unity-gain stable, and a great choice for a wide range of general-purpose and precision

applications. The zero-drift architecture provides ultra-low input offset voltage and near-zero input offset voltage

drift over temperature and time. This choice of architecture also offers outstanding ac performance, such as

ultra-low broadband noise, zero flicker noise, and outstanding distortion performance when operating below the

chopper frequency.

8.2 Functional Block Diagram

The functional block diagram shows a representation of the proprietary OPAx182 architecture.

+IN

±IN

OUT

Ripple Reduction

Technology

CLK

GM3

CCOMP

36-V Differential

Front End

Slew Boost

Circuitry

GM1

GM2

OPA182, OPA2182, OPA4182

SBOS936D – DECEMBER 2019 – REVISED DECEMBER 2021

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OPA182 Datasheet(PDF) 18 Page - Texas Instruments