1 Features
1• 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: 475 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
• Bridge Amplifiers
• Strain Gauges
• Test Equipment
• Transducer Applications
• Temperature Measurement
• Electronic Scales
• Medical Instrumentation
• Resistance Temperature Detectors
• Precision Active Filters

3 Description
The OPA4188 operational amplifier uses TI
proprietary auto-zeroing techniques to provide low
offset voltage (25 μV, maximum), and near zero-drift
over time and temperature. These miniature, highprecision,
low quiescent current amplifiers offer high
input impedance and rail-to-rail output swing within
15 mV of the rails, making them ideal for industrial
applications. The input common-mode range includes
the negative rail. Either single or dual supplies can be
used in the range of 4 V to 36 V (±2 V to ±18 V).
The quad version is available in 14-pin SOIC and 14-
pin TSSOP packages. All versions are specified for
operation from –40°C to +125°C.