Texas Instruments OPAx383 Zero-Drift Operational Amplifiers

Texas Instruments OPAx383 Zero-Drift Operational Amplifiers (Op Amps) are a family of precision amplifiers that offer state-of-the-art performance. With zero-drift technology, the OPAx383 offset voltage and offset drift provide unparalleled long-term stability. With an ultra-low 65µA of quiescent current, the OPAx383 can achieve 2.5MHz bandwidth, a broadband noise of 32nV/√Hz, and a 1/f noise at 650nVPP. These specifications are crucial to attain high precision and no linearity degradation in 16-bit to 24-bit analog to digital converters (ADCs). The Texas Instruments OPAx383 features a flat bias current over temperature, so little to no calibration is needed in high input impedance applications over temperature. All versions are specified over the industrial temperature range of –40°C to +125°C.

Features

  • Ultra-low offset voltage of ±5µV (max.)
  • ±0.025µV/°C zero drift
  • A low-input bias current of 50pA (max.)
  • 32nV√Hz at 1kHz low noise
  • No 1/f noise of 650nVPP (0.1Hz to 10Hz)
  • Common-mode input range ±100mV beyond supply rails
  • 2.5MHz gain bandwidth
  • Quiescent current of 65µA per amplifier
  • 1.7V to 5.5V single supply
  • ±0.85V to ±2.75V dual supply
  • EMI and RFI filtered inputs

Applications

  • Electronic thermometer
  • Weigh scale
  • Temperature transmitter
  • Ventilators
  • Data acquisition (DAQ)
  • Semiconductor test
  • Lab and field instrumentation
  • Merchant network and server PSU
  • Analog input module
  • Pressure transmitter

Functional Block Diagram

Block Diagram - Texas Instruments OPAx383 Zero-Drift Operational Amplifiers
Publicado: 2025-02-04 | Actualizado: 2025-08-22