6 Detailed Description

6.1 Overview

The OPAx591 are high precision, low power (420μA), high-slew rate (100V/μs), 85V operational amplifiers (op

amps). These op amps uses a proprietary design technique to achieve a very high slew capability with minimal

power consumption. The OPAx591 is capable of driving ±30mA of output current and can swing to within 100mV

of either power supply rail.

The amplifiers feature state-of-the-art CMOS technology and advanced design features that help achieve

outstanding ac performance and enable small package options. The OPAx591 strengths also include 3.75MHz

bandwidth, 12.8nV/√Hz noise spectral density, and low input bias current. These features make the OPAx591

an exceptional choice to gain or buffer the output of a digital-to-analog converter (DAC) and precision high-side

current sense applications.

6.2 Functional Block Diagram

–

+

–

+

Advanced

Slew Boost

IN+

OUT

OPAx591

NCH Input

Stage

PCH Input

Stage

Output

Stage

High

Capacitive Load

Compensation

IN–

V+

V

85V Differential

Mux-Friendly Input

OPA591, OPA2591

SBOSA47 – FEBRUARY 2026

www.ti.com

8

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