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OPA656 - FET-Input Operational Amplifier

General Description

The OPA656 combines a wideband, unity-gain stable, voltage-feedback operational amplifier with a lownoise junction gate field-effect transistor (JFET) input stage to offer an ultra high dynamic-range amplifier for transimpedance applications and high-speed data acquisition front-ends.

Key Features

  • Wide bandwidth:.
  • Gain-bandwidth product: 230MHz.
  • Unity-gain bandwidth: 550MHz.
  • Large-signal bandwidth (2VPP): 150MHz.
  • High precision:.
  • Input offset voltage: 600μV (maximum).
  • Input offset voltage drift: 6μV/°C (maximum).
  • Input voltage noise: 6nV/√Hz.
  • Input bias current: 2pA.
  • Low distortion (RL = 200Ω, VO = 2VPP):.
  • HD2, HD3 at 5MHz:.
  • 80dBc,.
  • 100dBc.
  • Supply range: 8V to 12V 2.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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OPA656 SBOS196I – DECEMBER 2001 – REVISED FEBRUARY 2024 OPA656 550MHz, Unity-Gain Stable, FET-Input Operational Amplifier 1 Features • Wide bandwidth: – Gain-bandwidth product: 230MHz – Unity-gain bandwidth: 550MHz – Large-signal bandwidth (2VPP): 150MHz • High precision: – Input offset voltage: 600μV (maximum) – Input offset voltage drift: 6μV/°C (maximum) • Input voltage noise: 6nV/√Hz • Input bias current: 2pA • Low distortion (RL = 200Ω, VO = 2VPP): – HD2, HD3 at 5MHz: –80dBc, –100dBc • Supply range: 8V to 12V 2 Applications • High-speed data acquisition (DAQ) • Medical and chemical analyzers • Active probes • Oscilloscopes • Optical communication modules • Test and measurement front-ends • Optical time-domain reflectometry (OTDR) VBIAS VREF CPD (20 pF) 5V + OPA656 VO – –5 V 100 k