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Texas Instruments OPAx892 Ultra-Low THD Operational Amplifiers

Texas Instruments OPAx892 Ultra-Low THD Operational Amplifiers are ultra-low voltage noise, high-speed voltage-feedback amplifiers. These amplifiers are excellent for low-voltage noise applications, including communication and imaging. The single-amplifier OPA892 and the dual-amplifier OPA2892 offer excellent AC performance with a 290MHz bandwidth, a 700V/µs slew rate, and a 30‑ns settling time (0.1%) for a gain of 10 V/V. The Texas Instruments OPAx892 are stable at gains of 10 or greater and –9 or less. These amplifiers have a high drive capability of 200 mA and draw only 7.5mA supply current per amplifier. With a total harmonic distortion (THD) of –68dBc at f = 1MHz, the OPAx892 are designed for applications requiring low distortion. Because the distortion remains low over a wide range of output voltages, the OPAx892 is useful in large dynamic-range applications such as imaging, sonar, and audio.

Features

  • Ultra-low 0.95nV/√Hz voltage noise
  • High speed
    • 2GHz gain-bandwidth product
    • 700V/µs slew rate
    • 30ns settling time (0.1%)
  • Stable at gains ≥ 10V/V
  • Output drive, IO = 200mA (typical)
  • Very low distortion
    • THD = –78dBc (f = 1MHz, RL = 150Ω)
    • THD+N = –114dBc (f = 1kHz, BW = 80kHz)
  • Wide range of power supplies
    • VCC = ±4.5V to ±18V
  • Offset nulling pins on the OPA892

Applications

  • Ultrasound scanner
  • Source measurement unit (SMU)
  • Power quality meter
  • Ultrasound scanners
  • Vector signal transceiver (VST)
  • Professional audio mixer or control surface
  • Professional microphones and wireless systems
  • Professional speaker systems
  • Professional audio amplifier
  • Soundbar
  • Turntable
  • Professional video camera
  • Guitar and other instrument amplifier
  • Data acquisition (DAQ)

Functional Block Diagrams

Block Diagram - Texas Instruments OPAx892 Ultra-Low THD Operational Amplifiers

Texas Instruments OPAx892 Ultra-Low THD Operational Amplifiers