OPA859

ACTIVE

1.8 GHz Unity-Gain Bandwidth, 3.3 nV/√Hz, FET Input Amplifier

Product details

Architecture FET / CMOS Input, Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 3.3 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.25 GBW (typ) (MHz) 900 BW at Acl (MHz) 1800 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 1150 Vn at flatband (typ) (nV√Hz) 3.3 Vn at 1 kHz (typ) (nV√Hz) 12.1 Iq per channel (typ) (mA) 20.5 Vos (offset voltage at 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) (µV/°C) -2 Iout (typ) (mA) 76 2nd harmonic (dBc) 90 3rd harmonic (dBc) 86 Frequency of harmonic distortion measurement (MHz) 10
Architecture FET / CMOS Input, Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 3.3 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.25 GBW (typ) (MHz) 900 BW at Acl (MHz) 1800 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 1150 Vn at flatband (typ) (nV√Hz) 3.3 Vn at 1 kHz (typ) (nV√Hz) 12.1 Iq per channel (typ) (mA) 20.5 Vos (offset voltage at 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) (µV/°C) -2 Iout (typ) (mA) 76 2nd harmonic (dBc) 90 3rd harmonic (dBc) 86 Frequency of harmonic distortion measurement (MHz) 10
WSON (DSG) 8 4 mm² 2 x 2
  • 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
  • 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

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.

 

 

 

 

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.

 

 

 

 

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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 PDF | HTML 12 Sep 2018
White paper An Introduction to Automotive LIDAR (Rev. B) PDF | HTML 21 Aug 2023
Application note LiFi: TI High-Speed Products for Optical Wireless Communication PDF | HTML 07 Aug 2023
Application note Choosing an Amplifier for Wide Bandwidth, High-Impedance, Data Acquisition AFEs PDF | HTML 02 Mar 2023
Technical article 3 common questions when designing with high-speed amplifiers PDF | HTML 17 Jul 2020
EVM User's guide DEM-OPA-WSON8-EVM User's Guide 07 Sep 2018
Technical article What you need to know about transimpedance amplifiers – part 2 PDF | HTML 01 Sep 2016
Technical article What you need to know about transimpedance amplifiers – part 1 PDF | HTML 06 May 2016
Technical article SPICE it up: How to extract the input capacitance of an op amp (part 3) PDF | HTML 21 Mar 2016
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.
User guide: PDF
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Simulation model

OPA859 PSpice Model

SBOMBQ2.ZIP (160 KB) - PSpice Model
Simulation model

OPA859 TINA-TI Reference Design

SBOMAS3.TSC (71 KB) - TINA-TI Reference Design
Simulation model

OPA859 TINA-TI Spice Model

SBOMAS2.ZIP (10 KB) - TINA-TI Spice Model
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

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 operational-amplifier (...)
Calculation tool

VOLT-DIVIDER-CALC — Voltage divider calculation tool

The voltage divider calculation tool (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. VOLT-DIVIDER-CALC can also be used to (...)
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 (...)
User guide: PDF
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WSON (DSG) 8 View options

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