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.