Texas Instruments' OPA189 high-precision operational amplifier is an ultra-low noise, fast-settling, zero-drift device that provides rail-to-rail output operation and features a unique MUX-friendly architecture and controlled startup system. These features and excellent AC performance, combined with only 0.4 µV of offset voltage and 0.005 µV/°C of drift over temperature, makes the OPA189 well-suited for precision instrumentation, signal measurement, and active filtering applications. Moreover, the MUX-friendly input architecture prevents inrush current when applying large input 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.
| Features |
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- Ultra-high precision:
- Zero-drift: 0.005 µV/°C
- Ultra-low offset voltage: 3 µV (max.)
- Excellent DC precision:
- CMRR: 168 dB
- Open-loop gain: 170 dB
- Low noise:
- en at 1 kHz: 5.2 nV/√Hz
- 0.1 Hz to 10 Hz noise: 0.1 µVPP
- Wide supply range: 4.5 V to 36 V
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- Excellent dynamic performance:
- Gain bandwidth: 14 MHz
- Slew rate: 20 V/µs
- Fast settling: 10 V step, 0.01% in 1.1 µs
- Robust design:
- MUX-friendly inputs
- RFI/EMI filtered inputs
- Wide supply range: 4.5 V to 36 V
- Quiescent current: 1.7 mA (max.)
- Rail-to-rail output
- Input includes negative rail
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| Applications |
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- Precision multi-channel systems
- Bridge amplifiers
- Strain gauges
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- Temperature measurement
- Resistance temperature detectors
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Texas Instruments' OPA189 high-precision operational amplifier is an ultra-low noise, fast-settling, zero-drift device that provides rail-to-rail output operation and features a unique MUX-friendly architecture and controlled startup system. These features and excellent AC performance, combined with only 0.4 µV of offset voltage and 0.005 µV/°C of drift over temperature, makes the OPA189 well-suited for precision instrumentation, signal measurement, and active filtering applications. Moreover, the MUX-friendly input architecture prevents inrush current when applying large input 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.
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