Product details

Number of channels (#) 1 GBW (Typ) (MHz) 6800 Total supply voltage (Max) (+5V=5, +/-5V=10) 3.6 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.3 Vos (offset voltage @ 25 C) (Max) (mV) 10 Rail-to-rail No Features Integrated TIA BW @ Acl (MHz) 130 Operating temperature range (C) -40 to 85
Number of channels (#) 1 GBW (Typ) (MHz) 6800 Total supply voltage (Max) (+5V=5, +/-5V=10) 3.6 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.3 Vos (offset voltage @ 25 C) (Max) (mV) 10 Rail-to-rail No Features Integrated TIA BW @ Acl (MHz) 130 Operating temperature range (C) -40 to 85
VQFN (RGT) 16 9 mm² 3 x 3
  • Internal Midscale Reference Voltage
  • Pseudo-Differential Output Voltage
  • Wide Dynamic Range
  • Closed-Loop Transimpedance Bandwidth:
    • 125 MHz (5-kΩ Transimpedance Gain,
      1.5-pF External Parasitic Capacitance)
    • 105 MHz (20-kΩ Transimpedance Gain,
      1.5-pF External Parasitic Capacitance)
  • Ultralow Input-Referred Current Noise
    (Brickwall Filter BW = 135 MHz):
    15 nARMS (20-kΩ Transimpedance)
  • Very Fast Overload Recovery Time: < 25 ns
  • Internal Input Protection Diode
  • Power Supply:
    • Voltage: 2.7 V to 3.6 V
    • Current: 23.4 mA
  • Extended Temperature Range: –40°C to +85°C
  • Internal Midscale Reference Voltage
  • Pseudo-Differential Output Voltage
  • Wide Dynamic Range
  • Closed-Loop Transimpedance Bandwidth:
    • 125 MHz (5-kΩ Transimpedance Gain,
      1.5-pF External Parasitic Capacitance)
    • 105 MHz (20-kΩ Transimpedance Gain,
      1.5-pF External Parasitic Capacitance)
  • Ultralow Input-Referred Current Noise
    (Brickwall Filter BW = 135 MHz):
    15 nARMS (20-kΩ Transimpedance)
  • Very Fast Overload Recovery Time: < 25 ns
  • Internal Input Protection Diode
  • Power Supply:
    • Voltage: 2.7 V to 3.6 V
    • Current: 23.4 mA
  • Extended Temperature Range: –40°C to +85°C

The OPA857 is a wideband, fast overdrive recovery, fast-settling, ultralow-noise transimpedance amplifier targeted at photodiode monitoring applications. With selectable feedback resistance, the OPA857 simplifies the design of high-performance optical systems. Very fast overload recovery time and internal input protection provide the best combination to protect the remainder of the signal chain from overdrive while minimizing recovery time. The two selectable transimpedance gain configurations allow high dynamic range and flexibility required in modern transimpedance amplifier applications. The OPA857 is available in a 3-mm × 3-mm VQFN package.

The device is characterized for operation over the full industrial temperature range from –40°C to +85°C.

The OPA857 is a wideband, fast overdrive recovery, fast-settling, ultralow-noise transimpedance amplifier targeted at photodiode monitoring applications. With selectable feedback resistance, the OPA857 simplifies the design of high-performance optical systems. Very fast overload recovery time and internal input protection provide the best combination to protect the remainder of the signal chain from overdrive while minimizing recovery time. The two selectable transimpedance gain configurations allow high dynamic range and flexibility required in modern transimpedance amplifier applications. The OPA857 is available in a 3-mm × 3-mm VQFN package.

The device is characterized for operation over the full industrial temperature range from –40°C to +85°C.

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Technical documentation

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Type Title Date
* Data sheet OPA857 Ultralow-Noise, Wideband, Selectable-Feedback Resistance Transimpedance Amplifier datasheet (Rev. D) 17 Aug 2016
White paper An Introduction to Automotive LIDAR (Rev. A) 21 May 2020
Application note Time of Flight and LIDAR - Optical Front End Design 04 Feb 2020
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
User guide OPA857EVM Evaluation Module (Rev. A) 09 Feb 2017
Design guide Extending Bandwith of the OPA857 Design Guide 25 Jul 2016
Technical article What you need to know about transimpedance amplifiers – part 1 06 May 2016
Design guide Optical Front-End System Design Guide 26 Oct 2015
Technical article How to evaluate a transimpedance amplifier (part 2) 12 Mar 2014
Technical article How to evaluate a transimpedance amplifier (part 1) 29 Jan 2014
Technical article Let there be light: Converting light into voltage 24 Jan 2014
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

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

Evaluation board

OPA857EVM — OPA857 Evaluation Module

The OPA857EVM is an evaluation module for the OPA857 amplifier in a QFN-16 (RGT) package. This evaluation module is designed to quickly and easily demonstrate the functionality and versatility of the amplifier. The  EVM is ready to connect to power, signal source, and test instruments through (...)

In stock
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Evaluation board

OPA857EVM-978 — OPA857 Bandwidth Extension Evaluation Module

The OPA857 is a wideband, ultralow noise transimpedance amplifier (TIA) targeted at photodiode monitoring applications. The OPA857 has two selectable gain configurations of 5kΩ and 20kΩ while maintaining a nearly constant closed-loop bandwidth in excess of 100MHz . In this reference (...)
In stock
Limit: 1
Simulation model

OPA857 TINA-TI Reference Design (Rev. A)

SBOM863A.TSC (31 KB) - TINA-TI Reference Design
Simulation model

OPA857 TINA-TI Spice Model (Rev. A)

SBOM864A.ZIP (6 KB) - TINA-TI Spice Model
Simulation model

OPA857 ADS Model (Rev. A)

SBOM931A.ZIP (35 KB) - Spice Model
Simulation model

OPA857 PSpice Model

SBOMBP8.ZIP (43 KB) - PSpice Model
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 (...)
Reference designs

TIDA-00663 — LIDAR Pulsed Time of Flight Reference Design

Light Detection and Ranging (LIDAR) systems use the time taken by the light to fly back and forth to an object in an effort to measure the distance to this target.  The TIDA-00663 reference design shows how to design the time measurement back-end for LIDAR based on Time to Digital Converter (...)
Reference designs

TIDA-01187 — LIDAR-Pulsed Time-of-Flight Reference Design Using High-Speed Data Converters

Time-of-flight (ToF) optical methods for measuring distance with high precision are utilized in a variety of applications, such as laser safety scanners, range finders, drones, and guidance systems. This design details the advantages of a high-speed data-converter-based solution, including target (...)
Reference designs

TIDA-00725 — Wide Bandwidth Optical Front-end Reference Design

This reference design implements and measures a complete 120MHz wide bandwidth optical front end comprising a high speed transimpedance amplifier, fully differential amplifier, and high speed 14-bit 160MSPS ADC with JESD204B interface.  Hardware and software are provided to evaluate the (...)
Reference designs

TIDA-00978 — Reference Design for Extending the OPA857 Transimpedance Bandwidth

The OPA857 is a wideband, ultralow noise transimpedance amplifier (TIA) targeted at photodiode monitoring applications. The OPA857 has two selectable gain configurations of 5kΩ and 20kΩ while maintaining a nearly constant closed-loop bandwidth in excess of 100MHz . In this reference (...)
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VQFN (RGT) 16 View options

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