Reference

Current

V+

V

IN+

V

INÛ

VÛ

(Ground)

V

BIAS2

V

BIAS1

Class AB

Control

Circuitry

V

O

100 k

PD

PD block

NMOS input pair

for phase reversal

protection only

6

OPA607

SBOS981 – OCTOBER 2019

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7 Detailed Description

7.1 Overview

The OPA607 is a low-noise, rail-to-rail output (RRO) operational amplifier (op amp). The device operates from a

supply voltage of 2.2 V to 5.5 V. The input common-mode voltage range also extends down to the negative rail

allowing the OPA607 op amp to be used in most single-supply applications. Rail-to-rail output swing significantly

increases dynamic range, especially in low-supply, voltage-range applications, which results in complete usage

of the full-scale range of the consecutive analog-to-digital converters (ADCs). The decompensated architecture

allows for a favorable tradeoff of low-quiescent current for a very-high gain-bandwidth product (GBW) and low-

distortion performance in high-gain applications.

7.2 Functional Block Diagram

7.3 Feature Description

7.3.1 Operating Voltage

The OPA607 operational amplifier is fully specified and assured for operation from 2.2 V to 5.5 V, applicable from

–40°C to +125°C. The OPA607 is completely operational with asymmetric voltages applied across the supply

Maximum Ratings table.