Product details


Architecture FET / CMOS Input, 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) 900 BW @ Acl (MHz) 1800 Acl, min spec gain (V/V) 1 Slew rate (Typ) (V/us) 1150 Vn at flatband (Typ) (nV/rtHz) 3.3 Vn at 1 kHz (Typ) (nV/rtHz) 12.1 Iq per channel (Typ) (mA) 20.5 Vos (offset voltage @ 25 C) (Max) (mV) 5 Rail-to-rail No Features Shutdown Rating Catalog Operating temperature range (C) -40 to 125 CMRR (Typ) (dB) 84 Input bias current (Max) (pA) 5 Offset drift (Typ) (uV/C) -2 Output current (Typ) (mA) 76 2nd harmonic (dBc) 90 3rd harmonic (dBc) 86 @ MHz 10 open-in-new Find other High-speed op amps (GBW>=50MHz)

Package | Pins | Size

WSON (DSG) 8 4 mm² 2 x 2 open-in-new Find other High-speed op amps (GBW>=50MHz)


  • High Unity-Gain Bandwidth: 1.8 GHz
  • Gain Bandwidth Product: 900 MHz
  • Ultra-Low Bias Current MOSFET Inputs: 10 pA
  • Low Input Voltage Noise: 3.3 nV/√Hz
  • Slew Rate: 1150 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
  • Package: 8-Pin WSON
  • Temperature Range: –40 to +125°C
open-in-new Find other High-speed op amps (GBW>=50MHz)


The OPA859 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 0.9-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths in low-capacitance photodiode applications.

The graph below shows the bandwidth and noise performance of the OPA859 as a function of the photodiode capacitance when the amplifier is set 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 OPA859 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA859 is optimized to operate in optical time-of-flight (ToF) systems where the OPA859 is used with time-to-digital converters, such as the TDC7201. Use the OPA859 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.





open-in-new Find other High-speed op amps (GBW>=50MHz)
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LMH32401 ACTIVE Programmable gain, differential output high-speed transimpedance amplifier This device is an integrated TIA with differential outputs for LiDAR applications
NEW OPA3S2859-EP PREVIEW Enhanced product dual-channel 900-MHz, 2.5-nV/√Hz, programmable gain transimpedance amplifier A dual-channel amplifier with similar FET input and 900-MHz bandwith that also features integrated switches for configurable gain.

Technical documentation

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Type Title Date
* Data sheet OPA859 1.8 GHz Unity-Gain Bandwidth, 3.3-nV/√Hz, FET Input Amplifier datasheet Sep. 12, 2018
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
Technical article How to reduce distortion in high-voltage, high-frequency signal generation for AWGs Oct. 30, 2018
User guide DEM-OPA-WSON8-EVM User's Guide Sep. 07, 2018
Technical article What are the advantages of using JFET-input amplifiers in high-speed applications? Jun. 19, 2018
Technical article Unique active mux capability combines buffer and switch into one solution Oct. 10, 2017
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 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.
  • Configured for split supply operation and modified for single supply 
  • Configurable for inverting and non-inverting gain configurations 
  • Includes connections for termination resistors to match to standard 50-Ω input/output impedance test equipment
  • Inputs and Outputs use standard SMA connector footprints

Design tools & simulation

SBOMAS2.ZIP (10 KB) - TINA-TI Spice Model
SBOMAS3.TSC (71 KB) - TINA-TI Reference Design
SBOMBQ2.ZIP (160 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
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)
Voltage Divider Determines A Set of Resistors for a Voltage Divider
VOLT-DIVIDER-CALC VOLT-DIVIDER-CALC quickly determines a set of resistors for a voltage divider. This KnowledgeBase Javascript utility can be used to find a set of resistors for a voltage divider to achieve the desired output voltage. This calculator can also be used to design non-inverting attentuation circuits.


CAD/CAE symbols

Package Pins Download
WSON (DSG) 8 View options

Ordering & quality

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