1 Features
• Low offset voltage: 25 μV (maximum)
• Zero drift: 0.03 μV/°C
• Low noise: 8.8 nV/√Hz
– 0.1-Hz to 10-Hz Noise: 0.25 μVPP
• Excellent dc precision:
– PSRR: 142 dB
– CMRR: 146 dB
– Open-loop gain: 136 dB
• Gain bandwidth: 2 MHz
• Quiescent current: 510 μA (Maximum)
• Wide supply range: ±2 V to ±18 V
• Rail-to-rail output
• Input includes negative rail
• RFI filtered inputs
• MicroSIZE packages

2 Applications
• Weight scale
• Analog input module
• Flow transmitter
• Battery test
• DC power supply, ac source, electronic load
• Data acquisition (DAQ)
• Semiconductor test

3 Description
The OPA188 operational amplifier uses TI's
proprietary auto-zeroing techniques to provide low
offset voltage (25-μV maximum) and near zero-drift
over time and temperature. This miniature, highprecision,
low-quiescent current amplifier offers high
input impedance and rail-to-rail output swing within 15
mV of the rails. The input common-mode range
includes the negative rail. Either single or dual
supplies can be used in the range from 4 V to 36 V
(±2 V to ±18 V).
The single version is available in the MicroSIZE SOT-
23-5, MSOP-8, and SO-8 packages. All versions are
specified for operation from –40°C to +125°C.