1 Features

• Low offset voltage: 10 µV (maximum)

• Zero drift: 0.001 µV/°C

• Low noise: 15 nV/√Hz

• PSRR: 160 dB

• CMRR: 140 dB

• AOL: 160 dB

• Quiescent Current: 100 µA

• Wide supply voltage: ±2.25 V to ±18 V

• Rail-to-rail output operation

• Input includes negative rail

• Low bias current: 100 pA (typical)

• EMI filtered inputs

• Microsize packages

2 Applications

• Analog input module

• Mixed module (AI, AO, DI, DO)

• Flow transmitter

• Pressure transmitter

• Test and measurement

• Semiconductor test

• Semiconductor manufacturing

• Process analytics (pH, gas, concentration, force,

and humidity)

3 Description

The OPAx187 series operational amplifiers use autozeroing techniques to simultaneously provide lowoffset voltage (1 µV), and near zero drift over time

and temperature. These miniature, high-precision,

low-quiescent current amplifiers offer high-input

impedance and rail-to-rail output swing within 5 mV of

the rails into high-impedance loads. The input

common-mode range includes the negative rail.

Either single or dual supplies can be used in the

range of 4.5 V to 36 V (±2.25 V to ±18 V).

The single version OPAx187 device is available in

microsize 8-pin VSSOP, 5-pin SOT-23, and 8-pin

SOIC packages. The dual version is offered in 8-pin

VSSOP and 8-pin SOIC packages. The quad version

is offered in 14-pin SOIC, 14-pin TSSOP, and 16-pin

WQFN packages. All versions are specified for

operation from –40°C to +125°C.