OPA187 Zero-Drift Op-Amp

By Texas Instruments 173

OPA187 Zero-Drift Op-Amp

Texas Instruments' OPA187 op-amp uses auto-zeroing techniques to simultaneously provide low offset-voltage (1 µV), and near zero-drift over time and temperature. The miniature, high-precision, low-quiescent current amp offers high-input impedance and rail-to-rail output swing within 5 mV of the rails into high-impedance loads. The input common-mode range includes the negative rail. Either single or dual supplies can be used in the range of 4.5 V to 36 V (±2.25 V to ±18 V).

The OPA187 is available in micro-sized 8-pin VSSOP, 5-pin SOT-23, and 8-pin SOIC packages. The device is specified for operation from -40°C to +125°C.

Features
  • Low offset-voltage: 10 µV (max.)
  • Zero-drift: 0.001 µV/°C
  • Low noise: 15 nV/√Hz
  • Wide supply voltage: ±2.25 V to ±18 V
  • PSRR: 160 dB
  • CMRR: 140 dB
  • AOL: 160 dB
  • Quiescent current: 100 µA
  • Rail-to-rail output operation
  • Input includes negative rail
  • Low bias current: 100 pA (typ.)
  • EMI filtered inputs
  • Micro-sized packages
Applications
  • Bridge amplifiers
  • Strain gauges
  • Test and measurement equipment
  • Transducer applications
  • Temperature measurements
  • Electronic scales
  • Medical instrumentation
  • RTD amplifiers
  • Precision active filters
  • Low-side current monitoring

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