OPA2189 CMOS Precision Op-Amp

By Texas Instruments 103

OPA2189 CMOS Precision Op-Amp

Texas Instruments' OPA2189 high-precision, ultra-low noise, fast-settling, zero-drift op-amp provides rail-to-rail output operation and features a MUX-friendly architecture and controlled start-up system. These features and excellent AC performance, combined with 0.4 µV of offset voltage and 0.005 µV/°C of drift over temperature for the single-channel version, make the OPA2189 ideal for precision instrumentation, signal measurement, and active filtering applications. The MUX-friendly input architecture prevents inrush current when applying large input differential voltages which improves settling performance in multi-channel systems while providing robust ESD protection during shipment, handling, and assembly. The device is specified over a temperature range of -40°C to +125°C.

Features
  • Ultra-high precision
  • 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
  • Quiescent current: 1.7 mA (maximum)
  • 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
    • FRI/EMI filtered inputs
  • Rail-to-rail output
  • Input includes negative rail
Applications
  • Precision multi-channel systems
  • Bridge amps
  • Strain gauges
  • Temperature measurement
  • Resistance temperature detectors

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