7 Detailed Description

7.1 Overview

The OPA593 is a precision, high-voltage (85 V), wide bandwidth (10 MHz), power operational amplifier (op amp)

with a high output current drive of ±250 mA. The device features a current limit that helps protect the system

in the event of an output short to ground. Unlike other power op amps, the current limit is specified for specific

current ranges from ±25 mA to ±250 mA. 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 protect the device from overheating). Lastly, the output can be disabled to save system power and

reduce thermal dissipation.

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

rail, a wide output swing range, and high dc precision. 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

V–

V+

Laser

Trim

Vbias 2

Vbias 1

OUT

E/D Com

Thermal

Flag

OPA593

+IN

Current

Flag

Status

Control

E/D Com

Enable/

Disable

Control

E/D

Slew

Boost

Class-AB

Biasing

Current

Limit

Control

ILIMIT

Current

Limit

Set

Mux

Friendly

Mux

Friendly

Current

Limit

Control

OPA593

SBOS659C – JANUARY 2022 – REVISED DECEMBER 2022

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