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Texas Instruments OPAx328 Operational Amplifiers

Texas Instruments OPAx328 Operational Amplifiers are single-channel and dual-channel precision, low-voltage CMOS operational amplifiers optimized for low noise and wide bandwidth. The OPAx328 features a linear input stage with zero crossover distortion that allows an excellent common mode rejection ratio (CMRR) of 120dB (typical) over the full input range. The device's input common-mode voltage range extends 100mV beyond the negative and positive supply rails.

The TI OPAx328 Operational Amplifiers utilize TI's proprietary e‑trim™ operational amplifier technology, permitting a unique combination of ultra-low offset and low input offset drift without the need for any input switching or auto-zero techniques. The low-noise (6.1nV/√Hz) and high-speed operation (40MHz, 30V/μs) make the OPAx328 ideal for driving sampling analog-to-digital converters (ADCs). Additionally, the OPAx328 is also suitable for high impedance-input, single-supply applications.

Features

  • Precision with zero-crossover distortion:
    • 50µV (maximum) Low offset voltage
    • 120dB High CMRR
    • Rail-to-rail I/O
  • 40MHz Wide bandwidth
  • 1pA (maximum) Low input bias current
  • 6.1nV/√Hz at 10kHz Low noise
  • 30V/µs Slew rate
  • 180ns Fast 0.01% settling time
  • 2.2V to 5.5V Single-supply voltage range
  • Unity-gain stable

Applications

  • Optical module
  • Position sensor
  • Multiparameter patient monitor
  • CT and PET scanner
  • Chemistry and gas analyzer
  • Bidirectional 400V and 800V to LV
  • Merchant network and server PSU
  • String inverter
  • Solar power optimizer

Block Diagram

Block Diagram - Texas Instruments OPAx328 Operational Amplifiers
發佈日期: 2022-07-27 | 更新日期: 2025-03-21