1 Features

• Low offset voltage: ±300 μV

• Low offset voltage drift: ±0.6 μV/°C

• Low noise: 30 nV/√Hz at 1 kHz

• High common-mode rejection: 115 dB

• Low bias current: ±10 pA

• Rail-to-rail input and output

• MUX-friendly/comparator inputs

– Amplifier operates with differential inputs up to

supply rail

– Amplifier can be used in open-loop or as

comparator

• Wide bandwidth: 1.1-MHz GBW

• High slew rate: 4.5 V/μs

• Low quiescent current: 120 μA per amplifier

• Wide supply: ±1.35 V to ±20 V, 2.7 V to 40 V

• Robust EMIRR performance: 78 dB at 1.8 GHz

• Differential and common-mode input voltage range

to supply rail

2 Applications

• Multiplexed data-acquisition systems

• Test and measurement equipment

• Motor drive: power stage and control modules

• Power delivery: UPS, server, and merchant

network power

• ADC driver and reference buffer amplifier

• Programmable logic controllers

• Analog input and output modules

• High-side and low-side current sensing

• High precision comparator

3 Description

The OPAx990 family (OPA990, OPA2990, and

OPA4990) is a family of high voltage (40 V) general

purpose operational amplifiers. These devices offer

excellent DC precision and AC performance, including

rail-to-rail input/output, low offset (±300 μV, typ), and

low offset drift (±0.6 μV/°C, typ).

Unique features such as differential and commonmode

input voltage range to the supply rail, high

short-circuit current (±80 mA), high slew rate (4.5 V/

μs), and shutdown make the OPAx990 an extremely

flexible, robust, and high-performance op amp for

high-voltage industrial applications.

The OPAx990 family of op amps is available in

micro-size packages (such as X2QFN, WSON, and

SOT-553), as well as standard packages (such as

SOT-23, SOIC, and TSSOP), and is specified from

–40°C to 125°C.