The OPAx189 (OPA189, OPA2189, and OPA4189) series of high-precision operational amplifiers are ultra-low noise, fast-settling, zero-drift devices that provide rail-to-rail output operation and feature a unique MUX-friendly architecture. These features and excellent ac performance, combined with only 0.4 µV of offset and 0.0035 µV/°C of drift over temperature, makes the OPAx189 well-suited for precision instrumentation, signal measurement, and active filtering applications. Moreover, the MUX-friendly input architecture prevents inrush current when applying large differential voltages which improves settling performance in multi-channel systems, all while providing robust ESD protection during shipment, handling, and assembly. All versions are specified from –40°C to +125°C.
● Ultra-High Precision:
● Ultra-Low Offset Voltage: 0.4 µV
● Zero-Drift: 0.0035 µV/°C
● Excellent DC Precision:
● CMRR: 168 dB
● Open-Loop Gain: 170 dB
● Low Noise:
● VN at 1 kHz: 5.8 nV/√Hz
● 0.1-Hz to 10-Hz Noise: 110 nVPP
● Excellent Dynamic Performance:
● Gain Bandwidth: 14 MHz
● Slew Rate: 20 V/µs
● Fast Settling: 10-V, 0.01% in 1.5 µs
● Robust Design:
● MUX-Friendly Inputs
● RFI/EMI Filtered Inputs
● Wide Supply Range: 4.5 V to 36 V
● Quiescent Current: 1.7 mA (Maximum)
● Rail-to-Rail Output
● Input Includes Negative Rail
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