7 Detailed Description

7.1 Overview

The OPA593 is a high-voltage (85 V), power operational amplifier (op amp) with a high output current drive of

250 mA. The device features a current limit with an accuracy of ≤ 5% when the output current is greater than 50

mA. The current limit helps protect the system in the event of an output short to ground. Additionally, the device

has two flags that indicate an overcurrent fault condition (beyond the configured limit) and an overtemperature

fault condition (when the output stage shuts down to prevent damage to the device). Lastly, the output can be

disabled to save system power and minimize thermal dissipation.

The unity-gain stable OPA593 has no phase inversion, a common-mode voltage range that includes the negative

rail, a rail-to-rail output, and high dc precision. This device also has a wide signal range, 10 MHz of gain

bandwidth, and high output current. All these features make the OPA593 an excellent choice as an output driver

for a device under test (DUT) in automated test equipment (ATE) systems, or for signal processing in industrial

systems using signals greater than 36 V.

7.2 Functional Block Diagram

–IN

Class-AB

Biasing

Mux

Friendly

Mux

Friendly

+IN

V–

V+

Laser

Trim

Vbias 2

Vbias 1

Current

Limit

Control

Current

Limit

Control

OUT

Iflag

Tflag

E/D Com

Current

Flag

Thermal

Flag

OPA593

OPA593

SBOS659A – JANUARY 2022 – REVISED MARCH 2022

www.ti.com

8

Submit Document Feedback

Copyright © 2022 Texas Instruments Incorporated

Product Folder Links: OPA593