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High-speed op amps (GBW ≥ 50 MHz)

OPA858

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5.5 GHz Gain Bandwidth Product, Decompensated Transimpedance Amplifier with FET Input

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Data sheet

OPA858

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) 5500 BW at Acl (MHz) 1200 Acl, min spec gain (V/V) 7 Slew rate (typ) (V/µs) 2000 Vn at flatband (typ) (nV√Hz) 2.5 Vn at 1 kHz (typ) (nV√Hz) 25 Iq per channel (typ) (mA) 20.5 Vos (offset voltage at 25°C) (max) (mV) 2.5 Rail-to-rail No Features Decompensated, Shutdown Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 80 Input bias current (max) (pA) 5 Offset drift (typ) (µV/°C) 1.5 Iout (typ) (mA) 80 2nd harmonic (dBc) 80 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) 5500 BW at Acl (MHz) 1200 Acl, min spec gain (V/V) 7 Slew rate (typ) (V/µs) 2000 Vn at flatband (typ) (nV√Hz) 2.5 Vn at 1 kHz (typ) (nV√Hz) 25 Iq per channel (typ) (mA) 20.5 Vos (offset voltage at 25°C) (max) (mV) 2.5 Rail-to-rail No Features Decompensated, Shutdown Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 80 Input bias current (max) (pA) 5 Offset drift (typ) (µV/°C) 1.5 Iout (typ) (mA) 80 2nd harmonic (dBc) 80 3rd harmonic (dBc) 86 Frequency of harmonic distortion measurement (MHz) 10
DIESALE (Y) — See data sheet WSON (DSG) 8 4 mm² (2 mm × 2 mm)
  • High gain bandwidth product: 5.5GHz
  • Decompensated, gain ≥ 7V/V (stable)
  • Ultra-low bias current MOSFET inputs: 10pA
  • Low input voltage noise: 2.5nV/√Hz
  • Slew rate: 2000V/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 gain bandwidth product: 5.5GHz
  • Decompensated, gain ≥ 7V/V (stable)
  • Ultra-low bias current MOSFET inputs: 10pA
  • Low input voltage noise: 2.5nV/√Hz
  • Slew rate: 2000V/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 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 5.5GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains in the range of tens to hundreds of kilohms.

The following graph shows 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 along a bandwidth range extending from dc to the calculated frequency (f) on the left scale. The OPA858 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA858 is optimized to operate in optical time-of-flight (ToF) systems where the OPA858 is used with time-to-digital converters, such as the TDC7201. Use the OPA858 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 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 5.5GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains in the range of tens to hundreds of kilohms.

The following graph shows 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 along a bandwidth range extending from dc to the calculated frequency (f) on the left scale. The OPA858 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA858 is optimized to operate in optical time-of-flight (ToF) systems where the OPA858 is used with time-to-digital converters, such as the TDC7201. Use the OPA858 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 OPA858 5.5GHz Gain Bandwidth Product, Gain of 7V/V Stable, FET Input Amplifier datasheet (Rev. B) PDF | HTML May 5, 2025
White paper An Introduction to Automotive LIDAR (Rev. D) PDF | HTML Apr 16, 2025
Circuit design Transimpedance amplifier circuit. (Rev. B) PDF | HTML Sep 26, 2024
Application brief LiFi: TI High-Speed Products for Optical Wireless Communication PDF | HTML Aug 7, 2023
Application brief Time of Flight and LIDAR - Optical Front End Design (Rev. A) PDF | HTML Apr 29, 2022
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 PDF | HTML Jul 17, 2020
Analog design Journal Maximizing the dynamic range of analog fronts ends having a transimpedance amp Jun 14, 2019
Analog design Journal Easily improve the performance of analog circuits with decompensated amplifiers (Rev. A) May 21, 2019
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
Application note AN-1604 Decompensated Operational Amplifiers (Rev. B) May 1, 2013
Application note AN-1803 Design Considerations for a Transimpedance Amplifier (Rev. A) May 1, 2013
Application note Transimpedance Considerations for High-Speed Operational Amplifiers Nov 22, 2009
Application note Compensate Transimpedance Amplifiers Intuitively (Rev. A) Mar 30, 2005
Analog design Journal Using a decompensated op amp for improved performance Mar 11, 2005

Design & development

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

Evaluation board

OPA858DSGEVM — OPA858, 5.5 GHz GBP, Decompensated Transimpedance Amplifier with FET Input Evaluation Module

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 (...)
User guide: PDF
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Simulation model

OPA858 PSpice Model

SBOMBK7.ZIP (49 KB) - PSpice model
Supported products & hardware
Simulation model

OPA858 TINA-TI Reference Design (Rev. B)

SBOMAM5B.TSC (66 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

OPA858 TINA-TI Spice Model (Rev. B)

SBOMAM4B.ZIP (14 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

OPA858, THS4541 Flow Cytometry Example Front End PSpice Reference Design

SBOMBL1.ZIP (27 KB) - PSpice model
Supported products & hardware
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 (...)

Supported products & hardware
Reference design

TIDA-060025 — Reference design maximizing transimpedance bandwidth for LIDAR and time-of-flight (ToF) applications

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 (...)
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DIESALE (Y) — Ultra Librarian
WSON (DSG) 8 Ultra Librarian
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