1 Features

• Low offset voltage: ±5 μV

• Low offset voltage drift: ±0.1 μV/°C

• Low noise: 15 nV/√ Hz at 1 kHz

• High common-mode rejection: 140 dB

• Low bias current: ±5 pA

• Rail-to-rail input and output

• Wide bandwidth: 2.5-MHz GBW

• High slew rate: 5 V/μs

• Low quiescent current: 140 μA per amplifier

• Wide supply: ±2.25 V to ±18 V, 4.5 V to 36 V

• EMI/RFI filtered inputs

• Differential input voltage range to supply rail

• High capacitive load drive capability: 1 nF

• Industry standard packages:

– Single in SOIC-8, SOT-5, and VSSOP-8

– Dual in SOIC-8 and VSSOP-8

– Quad in SOIC-14, TSSOP-14, and WQFN-16

2 Applications

• Analog input module

• Mixed module (AI, AO, DI, DO)

• Data acquisition (DAQ)

• Source measurement unit (SMU)

• Pressure transmitter

• Train control and management systems

• Lab and field instrumentation

3 Description

The OPAx191 family (OPA191, OPA2191, and

OPA4191) is a new generation of 36-V, e-trim™

operational amplifiers.

These devices offer outstanding dc precision and

ac performance, including rail-to-rail input/output, low

offset voltage (±5 μV, typ), low offset drift (±0.2 μV/°C,

typ), and 2-MHz bandwidth.

Unique features, such as differential input-voltage

range to the supply rail, high output current (±65 mA),

high capacitive load drive of up to 1 nF, and high

slew rate (5 V/μs), make the OPAx191 a robust, highperformance

operational amplifier for high-voltage

industrial applications.

The OPAx191 family of op amps is available in

standard packages and is specified from –40°C to

+125°C.