Product details


Number of channels (#) 1 GBW (Typ) (MHz) 5500 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) 1200 Operating temperature range (C) -40 to 125 open-in-new Find other Transimpedance amplifiers

Package | Pins | Size

WSON (DSG) 8 4 mm² 2 x 2 open-in-new Find other Transimpedance amplifiers


  • 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 Voltage Range: 3.3 V to 5.25 V
  • Quiescent Current: 20.5 mA
  • Available in 8-Pin WSON Package
  • Temperature Range: –40 to +125°C

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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 closed-loop 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. The total noise is calculated over a bandwidth range extending from DC to the calculated f-3dB frequency on the left-hand scale. The OPA858 package features a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA858 is optimized for use in optical Time-of-Flight (ToF) systems like the one shown in the figure below where the OPA858 is used with the TDC7201 time-to-digital converter. The OPA858 can be used in high-resolution LIDAR systems with a high-speed analog-to-digital converter (ADC) and a differential output amplifier like the THS4541 or LMH5401 to drive the ADC.

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Technical documentation

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Type Title Date
* Data sheet OPA858 5.5-GHz Gain Bandwidth Product, Gain of 7 V/V Stable, FET Input Amplifier datasheet (Rev. A) Jul. 30, 2018
Application note High Speed ADCs and Amplifiers for Flow Cytometry Applications Oct. 12, 2020
Technical article 3 common questions when designing with high-speed amplifiers Jul. 17, 2020
White paper An Introduction to Automotive LIDAR (Rev. A) May 21, 2020
Application note Time of Flight and LIDAR - Optical Front End Design Feb. 04, 2020
Application note Maximizing the dynamic range of analog fronts ends having a transimpedance amp Jun. 14, 2019
Application note Easily improve the performance of analog circuits with decompensated amplifiers (Rev. A) May 21, 2019
Application note Transimpedance amplifier circuit. (Rev. A) Feb. 01, 2019
User guide DEM-OPA-WSON8-EVM User's Guide Sep. 07, 2018
User guide OPA858 Op Amp EVM User's Guide Oct. 02, 2017
Technical article What you need to know about transimpedance amplifiers – part 2 Sep. 01, 2016
Technical article What you need to know about transimpedance amplifiers – part 1 May 06, 2016
Technical article SPICE it up: How to extract the input capacitance of an op amp (part 3) Mar. 21, 2016
Application note AN-1604 Decompensated Operational Amplifiers (Rev. B) May 01, 2013
Application note AN-1803 Design Considerations for a Transimpedance Amplifier (Rev. A) May 01, 2013
Application note Transimpedance Considerations for High-Speed Operational Amplifiers Nov. 22, 2009
Application note Compensate Transimpedance Amplifiers Intuitively (Rev. A) Mar. 30, 2005
Application note Using a decompensated op amp for improved performance Mar. 11, 2005
Application note Noise Analysis for High Speed Op Amps (Rev. A) Jan. 17, 2005

Design & development

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

Hardware development

document-generic User guide
The OPA858DSGEVM is an evaluation module for the single OPA858 in the DSG (8-pin WSON) package. The OPA858DSGEVM 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 the use of (...)
  • Configured for split supply operation and modified for single supply
  • Default non-inverting gain of 7 configuration can be reconfigured for other gains
  • Designed for connection to standard 50-Ω input/output impedance test equipment
  • Inputs and Outputs include SMA connectors

Design tools & simulation

SBOMAM4B.ZIP (14 KB) - TINA-TI Spice Model
SBOMAM5B.TSC (66 KB) - TINA-TI Reference Design
SBOMBK7.ZIP (49 KB) - PSpice Model
SBOMBL1.ZIP (27 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide

Reference designs

Reference design maximizing transimpedance bandwidth for LIDAR and time-of-flight (ToF) applications
TIDA-060025 — This design demonstrates a high-speed optical front-end with a Time of Flight (ToF) distance measurement circuit using a fiber-optic transmission medium, which can be adapted to any type of ToF measurement such as through free space. This design features an industry-leading 2.5-V output linear (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WSON (DSG) 8 View options

Ordering & quality

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