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.