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High-speed op amps (GBW ≥ 50 MHz)

OPA859

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

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Data sheet

OPA859

ACTIVE
Data sheet Order now

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 mm × 2 mm) DIESALE (Y) — See data sheet
  • High unity-gain bandwidth: 1.8GHz
  • Gain bandwidth product: 900MHz
  • Ultra-low bias current MOSFET inputs: 10pA
  • Low input voltage noise: 3.3nV/√Hz
  • Slew rate: 1150V/µs
  • Low Input capacitance:
    • Common-mode: 0.6pF
    • Differential: 0.2pF
  • Wide input common-mode range:
    • 1.4V from positive supply
    • Includes negative supply
  • 2.5VPP output swing in TIA configuration
  • Supply voltage range: 3.3V to 5.25V
  • Quiescent current: 20.5mA
  • Package: 8-pin WSON
  • Temperature range: –40°C to +125°C
  • High unity-gain bandwidth: 1.8GHz
  • Gain bandwidth product: 900MHz
  • Ultra-low bias current MOSFET inputs: 10pA
  • Low input voltage noise: 3.3nV/√Hz
  • Slew rate: 1150V/µs
  • Low Input capacitance:
    • Common-mode: 0.6pF
    • Differential: 0.2pF
  • Wide input common-mode range:
    • 1.4V from positive supply
    • Includes negative supply
  • 2.5VPP output swing in TIA configuration
  • Supply voltage range: 3.3V to 5.25V
  • Quiescent current: 20.5mA
  • Package: 8-pin WSON
  • Temperature range: –40°C 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 0.9GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths in low-capacitance photodiode applications.

The following graph shows the bandwidth and noise performance of the OPA859 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 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 devices.

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

The following graph shows the bandwidth and noise performance of the OPA859 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 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 devices.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet OPA859 1.8GHz Unity-Gain Bandwidth, 3.3nV/√Hz, FET Input Amplifier datasheet (Rev. A) PDF | HTML May 5, 2025
White paper An Introduction to Automotive LIDAR (Rev. D) PDF | HTML Apr 16, 2025
Product overview Pairing High-Speed JFET Amplifiers With Hi-Z DAQ Systems PDF | HTML Apr 8, 2024
Application brief LiFi: TI High-Speed Products for Optical Wireless Communication PDF | HTML Aug 7, 2023
Application note Choosing an Amplifier for Wide Bandwidth, High-Impedance, Data Acquisition AFEs PDF | HTML Mar 2, 2023
Technical article 3 common questions when designing with high-speed amplifiers PDF | HTML Jul 17, 2020
Technical article What you need to know about transimpedance amplifiers – part 2 PDF | HTML Sep 1, 2016
Technical article What you need to know about transimpedance amplifiers – part 1 PDF | HTML May 6, 2016
Technical article SPICE it up: How to extract the input capacitance of an op amp (part 3) PDF | HTML Mar 21, 2016

Design & development

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Evaluation board

DEM-OPA-WSON8-EVM — Unpopulated evaluation module for single-channel operational amplifiers in 8-pin WSON (DSG) 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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Simulation model

OPA859 PSpice Model

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

OPA859 TINA-TI Reference Design

SBOMAS3.TSC (71 KB) - TINA-TI reference design
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Simulation model

OPA859 TINA-TI Spice Model

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

ANALOG-ENGINEER-CALC — PC software 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 (...)

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WSON (DSG) 8 Ultra Librarian
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