OPAx591 85V, Precision (1µV/°C), Low-Power (450μA), High-Slew Rate (100V/μs) Op

Amps With MUX-Friendly Inputs

1 Features

• Wide supply voltage range: 8V to 85V

• Low offset voltage: 225µV, max

• Low offset drift: 1µV/°C, max

• High CMRR: 125dB, min

• High PSRR: 120dB, min

• Low input bias current: 15pA, max

• Low noise: 12.9nV/√Hz at 1kHz

• Wide bandwidth: 3.75MHz at 40dB

• High slew rate: 100V/µs

• Low quiescent current: 450µA

• Rail-to-rail output

• Unity gain stable

• Mux-friendly inputs

• Thermal shutdown protection

• Small package options:

– Single: SOT-23

– Dual: VSSOP, SOIC

2 Applications

• Semiconductor test

• CT and PET scanner

• Programmable DC power supply

• Source measurement unit (SMU)

• Analytical lab instrumentation

• Power analyzer

• Optical module

+

–

V

IN

V

OUT

R

+

–

V

IN+

R

+

–

R

R

INA592

V+

V+

V++

OPAx591

V

REF

OPAx591

R

G

R

F

R

F

OPA591 Buffer With INA592

3 Description

The OPAx591 is a family of high precision, 85V

CMOS power amplifiers available in small, industry

standard packages.

These devices are laser trimmed to provide excellent

dc performance, including 225µV max offset, 1µV/°C

max offset drift. The high power supply and common-

mode rejection help these op amps maintain high

dc performance across different operating conditions.

Degradation of precision is minimal because of the

very low input bias current across the entire operating

voltage range.

The OPAx591 also excels in ac performance despite

the low quiescent current consumption. Proprietary

design techniques provide 100V/µs slew rate and

MUX-friendly inputs to enable fast settling of large

signals. The low broadband noise help maintain signal

fidelity across a wide frequency spectrum.

The combination of high precision, low noise, low

power, and small packages make the OPAx591 a

great choice for high voltage, space constrained

systems where power consumption and, or thermal

management is critical. Such systems include

automated test equipment requiring high voltage

and precision, power supplies requiring current or

voltage sensing, and piezo actuator driving for haptic

feedback systems.

This family of amplifiers operates over the extended

industrial temperature range of –40°C to +125°C.

Device Information

PART NUMBER

CHANNEL COUNT

PACKAGE (1)

OPA591

Single

DBV (SOT-23, 5)

OPA2591

Dual

D (SOIC, 8)(2)

DGK (VSSOP, 8)(2)

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

(2)

This package is preview only.

OPA591, OPA2591

SBOSA47A – FEBRUARY 2026 – REVISED SEPTEMBER 2026

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION

DATA.