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OPA858 Datasheet FET Input Amplifier

Manufacturer: Texas Instruments

Overview: Product Folder Order Now Technical Documents Tools & Software Support & Community OPA858 SBOS629A – APRIL 2018 – REVISED JULY 2018 OPA858 5.

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General Description

The OPA858 is a wideband, low-noise, operational amplifier with CMOS inputs for wideband transimpedance and voltage amplifier applications.

When the device is configured as a transimpedance amplifier (TIA), the 5.5-GHz gain bandwidth product (GBWP) enables applications requiring high closedloop bandwidths at transimpedance gains in the tens to hundreds of kΩs range.

The graph below demonstrates the bandwidth and noise performance of the OPA858 as a function of the photodiode capacitance when the amplifier is configured as a TIA.

Key Features

  • 1 High Gain Bandwidth Product: 5.5 GHz.
  • Decompensated, Gain ≥ 7 V/V (Stable).
  • Ultra-Low Bias Current MOSFET Inputs: 10 pA.
  • Low Input Voltage Noise: 2.5 nV/√Hz.
  • Slew rate: 2000 V/µs.
  • Low Input Capacitance:.
  • Common-Mode: 0.6 pF.
  • Differential: 0.2 pF.
  • Wide Input Common-Mode Range:.
  • 1.4 V from Positive Supply.
  • Includes Negative Supply.
  • 2.5 VPP Output Swing in TIA Configuration.
  • Supply.

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