Product details

Architecture Voltage FB Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 3.3 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.25 GBW (Typ) (MHz) 8000 BW @ Acl (MHz) 2500 Acl, min spec gain (V/V) 7 Slew rate (Typ) (V/us) 2750 Vn at flatband (Typ) (nV/rtHz) 0.98 Vn at 1 kHz (Typ) (nV/rtHz) 1.9 Iq per channel (Typ) (mA) 19.5 Vos (offset voltage @ 25 C) (Max) (mV) 2.5 Rail-to-rail No Features Shutdown, Decompensated Rating Automotive Operating temperature range (C) -40 to 125 CMRR (Typ) (dB) 100 Input bias current (Max) (pA) 18500000 Offset drift (Typ) (uV/C) 1.25 Output current (Typ) (mA) 80 2nd harmonic (dBc) 80 3rd harmonic (dBc) 86 @ MHz 10
Architecture Voltage FB Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 3.3 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.25 GBW (Typ) (MHz) 8000 BW @ Acl (MHz) 2500 Acl, min spec gain (V/V) 7 Slew rate (Typ) (V/us) 2750 Vn at flatband (Typ) (nV/rtHz) 0.98 Vn at 1 kHz (Typ) (nV/rtHz) 1.9 Iq per channel (Typ) (mA) 19.5 Vos (offset voltage @ 25 C) (Max) (mV) 2.5 Rail-to-rail No Features Shutdown, Decompensated Rating Automotive Operating temperature range (C) -40 to 125 CMRR (Typ) (dB) 100 Input bias current (Max) (pA) 18500000 Offset drift (Typ) (uV/C) 1.25 Output current (Typ) (mA) 80 2nd harmonic (dBc) 80 3rd harmonic (dBc) 86 @ MHz 10
WSON (DSG) 8 4 mm² 2 x 2
  • AEC-Q100 Qualified for Automotive Applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • High Gain Bandwidth Product: 8 GHz
  • Decompensated, Gain ≥ 7 V/V (Stable)
  • Low Input Voltage Noise: 0.98 nV/√Hz
  • Slew Rate: 2750 V/µs
  • Low Input Capacitance:
    • Common-Mode: 0.6 pF
    • Differential: 0.2 pF
  • Wide Input Common-Mode Range:
    • 0.4 V from Positive Supply
    • 1.1 V from Negative Supply
  • 3 VPP Total Output Swing
  • Supply Voltage Range: 3.3 V to 5.25 V
  • Quiescent Current: 17.8 mA
  • Package: 8-Pin WSON
  • Temperature Range: –40°C to +125°C
  • AEC-Q100 Qualified for Automotive Applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • High Gain Bandwidth Product: 8 GHz
  • Decompensated, Gain ≥ 7 V/V (Stable)
  • Low Input Voltage Noise: 0.98 nV/√Hz
  • Slew Rate: 2750 V/µs
  • Low Input Capacitance:
    • Common-Mode: 0.6 pF
    • Differential: 0.2 pF
  • Wide Input Common-Mode Range:
    • 0.4 V from Positive Supply
    • 1.1 V from Negative Supply
  • 3 VPP Total Output Swing
  • Supply Voltage Range: 3.3 V to 5.25 V
  • Quiescent Current: 17.8 mA
  • Package: 8-Pin WSON
  • Temperature Range: –40°C to +125°C

The OPA855-Q1 is a wideband, low-noise operational amplifier with bipolar inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 8-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains of up to tens of kΩs.

The graph below shows the bandwidth and noise performance of the OPA855-Q1 as a function of the photodiode capacitance when the amplifier is configured as a TIA. The total noise is calculated along a bandwidth range extending from DC to the calculated frequency (f) on the left scale. The OPA855-Q1 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA855-Q1 is optimized to operate in optical time-of-flight (ToF) systems where the OPA855-Q1 is used with time-to-digital converters, such as the TDC7201. Use the OPA855-Q1 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541-Q1.

The OPA855-Q1 is a wideband, low-noise operational amplifier with bipolar inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 8-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains of up to tens of kΩs.

The graph below shows the bandwidth and noise performance of the OPA855-Q1 as a function of the photodiode capacitance when the amplifier is configured as a TIA. The total noise is calculated along a bandwidth range extending from DC to the calculated frequency (f) on the left scale. The OPA855-Q1 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA855-Q1 is optimized to operate in optical time-of-flight (ToF) systems where the OPA855-Q1 is used with time-to-digital converters, such as the TDC7201. Use the OPA855-Q1 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541-Q1.

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Technical documentation

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Type Title Date
* Data sheet 8-GHz Gain Bandwidth Product, Gain of 7-V/V Stable, Bipolar Input Amplifier datasheet (Rev. A) 26 Mar 2021
Technical article 3 common questions when designing with high-speed amplifiers 17 Jul 2020
Technical article How to reduce distortion in high-voltage, high-frequency signal generation for AWGs 30 Oct 2018
Technical article What are the advantages of using JFET-input amplifiers in high-speed applications? 19 Jun 2018
Technical article Unique active mux capability combines buffer and switch into one solution 10 Oct 2017
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

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Evaluation board

DEM-OPA-WSON8-EVM — Unpopulated evaluation module for single channel op-amps in the DSG (8-pin WSON) package

The DEM-OPA-WSON8-EVM is an unpopulated evaluation module for the single channel op-amps in the DSG (8-pin WSON) package. This EVM is designed to high-speed performance specifications and is compatible with amplifiers that have over 1 GHz of gain bandwidth.
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Evaluation board

OPA855DSGEVM — OPA855DSG Evaluation Module

The OPA855DSG EVM is an evaluation module for the single OPA855 in the DSG (8-pin WSON) package.  The OPA855DSG EVM is designed to quickly demonstrate the functionality and versatility of the amplifier.  The EVM is ready to connect to power, signal source, and test instruments through (...)
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Simulation tool

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