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1 Features

? Ultra-high precision:

– Zero-drift: 0.003 μV/°C

– Ultra-low offset voltage: 4 μV (maximum)

? Excellent dc precision:

– CMRR: 168 dB

– Open-loop gain: 170 dB

? Low noise:

– en at 1 kHz: 5.7 nV/√Hz

– 0.1-Hz to 10-Hz noise: 0.12 μVPP

? Excellent dynamic performance:

– Gain bandwidth: 5 MHz

– Slew rate: 10 V/μs

– Fast settling: 10-V step, 0.01 in 1.7 μs

? Robust design:

– MUX-friendly inputs

– RFI and EMI filtered inputs

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

? Quiescent current: 0.85 mA

? Rail-to-rail output

? Input includes negative rail

2 Applications

? Battery test

? DC power supply, ac source, electronic load

? Data acquisition (DAQ)

? Semiconductor test

? Weigh scale

? Analog input module

? Flow transmitter

3 Description

The OPA182, OPA2182, and OPA4182 (OPAx182)

are ultra-low noise, fast-settling, zero-drift, highprecision

operational amplifiers, These devices

provide rail-to-rail output operation and feature a

unique MUX-friendly architecture and controlled startup

system. These devices also feature excellent ac

performance combined with only 0.45 μV of offset

voltage and 0.003 μV/°C of drift over temperature. All

these features make the OPAx182 a great choice for

data acquisition, battery test, analog input modules,

weigh scales, and any other systems requiring high dc

precision and low noise.

The MUX-friendly input architecture prevents inrush

current when applying large input differential voltages

and improves settling performance in multichannel

systems. Moreover, the controlled start-up system

rejects any inrush current when ramping up the supply

rails, all while providing robust ESD protection during

shipment, handling, and assembly.

The device is specified from –40°C to +125°C.