OPA2188 Zero-Drift Operational Amplifier

By Texas Instruments 115

OPA2188 Zero-Drift Operational Amplifier

Texas Instruments' OPA2188 series operational amplifiers use TI proprietary auto-zeroing techniques to provide low offset voltage (25 µV, max), and near zero-drift over time and temperature. These miniature, high-precision, low quiescent current amplifiers offer high input impedance and rail-to-rail output swing within 15 mV of the rails. The input common-mode range includes the negative rail. Either single or dual supplies can be used in the range of +4.0 V to +36 V (±2 V to ±18 V). The single version is available in the MicroSIZE SOT23-5, MSOP-8, and SO-8 packages; the dual is offered in MSOP-8 and SO-8 packages; the quad is offered in SO-14 and TSSOP-14 packages. All versions are specified for operation from -40°C to +105°C.

Features Applications
  • Very low offset and drift
    • Offset voltage: 25 µV (max)
    • Offset voltage drift: 0.085 µV/°C max
    • CMRR, PSRR, Aol = 130 dB (min)
  • Noise voltage: 8.8 nV/√Hz at 1 kHz
    • GBW : 2 MHz
  • Low quiescent current: 475 µA (max)
  • Low bias current: 160 pA (typ)
  • Supply range: +4.0 V to +36 V or ±2 V to ±18 V
    • Rail to rail output
    • EMI/RFI filtered inputs
  • Electronic weigh scales
  • Bridge amplifiers
  • Strain gauges
  • Automated test equipment
  • Transducer amplifiers
  • Medical instrumentations
  • Resistor thermal detectors