Product details

Number of channels (#) 1 GBW (Typ) (MHz) 8000 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.25 Total supply voltage (Min) (+5V=5, +/-5V=10) 3.3 Vos (offset voltage @ 25 C) (Max) (mV) 2.5 Rail-to-rail No Features Shutdown, Decompensated BW @ Acl (MHz) 2500 Operating temperature range (C) -40 to 125
Number of channels (#) 1 GBW (Typ) (MHz) 8000 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.25 Total supply voltage (Min) (+5V=5, +/-5V=10) 3.3 Vos (offset voltage @ 25 C) (Max) (mV) 2.5 Rail-to-rail No Features Shutdown, Decompensated BW @ Acl (MHz) 2500 Operating temperature range (C) -40 to 125
WSON (DSG) 8 4 mm² 2 x 2
  • 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 to +125°C
  • 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 to +125°C

The OPA855 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 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-hand scale. The OPA855 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA855 is optimized to operate in optical time-of-flight (ToF) systems where the OPA855 is used with time-to-digital converters, such as the TDC7201. Use the OPA855 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541 or LMH5401.

 

 

The OPA855 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 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-hand scale. The OPA855 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA855 is optimized to operate in optical time-of-flight (ToF) systems where the OPA855 is used with time-to-digital converters, such as the TDC7201. Use the OPA855 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541 or LMH5401.

 

 

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Technical documentation

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Type Title Date
* Data sheet OPA855 8-GHz Gain Bandwidth Product, Gain of 7-V/V Stable, Bipolar Input Amplifier datasheet (Rev. A) 22 Oct 2018
Application note High Speed ADCs and Amplifiers for Flow Cytometry Applications 12 Oct 2020
Technical article 3 common questions when designing with high-speed amplifiers 17 Jul 2020
White paper An Introduction to Automotive LIDAR (Rev. A) 21 May 2020
Application note Time of Flight and LIDAR - Optical Front End Design 04 Feb 2020
Analog design journal Maximizing the dynamic range of analog fronts ends having a transimpedance amp 14 Jun 2019
Analog design journal Easily improve the performance of analog circuits with decompensated amplifiers (Rev. A) 21 May 2019
Application note Transimpedance amplifier circuit. (Rev. A) 01 Feb 2019
User guide DEM-OPA-WSON8-EVM User's Guide 07 Sep 2018
User guide OPA855DSGEVM User's Guide 16 Jul 2018
Technical article What you need to know about transimpedance amplifiers – part 2 01 Sep 2016
Technical article What you need to know about transimpedance amplifiers – part 1 06 May 2016
Technical article SPICE it up: How to extract the input capacitance of an op amp (part 3) 21 Mar 2016
Application note AN-1604 Decompensated Operational Amplifiers (Rev. B) 01 May 2013
Application note AN-1803 Design Considerations for a Transimpedance Amplifier (Rev. A) 01 May 2013
Application note Transimpedance Considerations for High-Speed Operational Amplifiers 22 Nov 2009
Application note Compensate Transimpedance Amplifiers Intuitively (Rev. A) 30 Mar 2005
Analog design journal Using a decompensated op amp for improved performance 11 Mar 2005
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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 model

OPA855 TINA-TI Spice Model (Rev. B)

SBOMAP6B.ZIP (14 KB) - TINA-TI Spice Model
Simulation model

OPA855 Unencrypted TINA-TI Reference Design Package (Rev. C)

SBOMAP7C.TSC (167 KB) - TINA-TI Reference Design
Simulation model

OPA855 Unencrypted PSpice Model Package (Rev. D)

SBOMB43D.ZIP (37 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
Package Pins Download
WSON (DSG) 8 View options

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