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Product details

Parameters

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 open-in-new Find other Transimpedance amplifiers

Package | Pins | Size

VQFN (RGT) 16 9 mm² 3 x 3 open-in-new Find other Transimpedance amplifiers

Features

  • 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
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Description

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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Same functionality and pinout but is not an equivalent to the compared device:
OPA857-DIE ACTIVE Low-Noise, Wideband, Selectable-gain, Transimpedance Amp This is the same device, but is a bare die version

Technical documentation

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

EVALUATION BOARDS Download
document-generic User guide
99
Description

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 (...)

Features
  • The EVM is configured for single-supply operation to a pseudo-differential output.
  • The transimpedance gain can be easily configured for either the 5-kΩ or the 20-kΩ gain option.
  • The EVM is designed for easy connection to standard 50-Ω input and output impedance test equipment.
  • The inputs and outputs (...)
EVALUATION BOARDS Download
document-generic User guide
99
Description
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 (...)
Features
  • Extending the bandwidth of the OPA857 from 100MHz to greater than 250MHz
  • Adjusting the gain of the OPA857 between 1-20kΩ
  • Evaluation module allows flexibility in testing the OPA857 in internal test mode or with an external photodiode

Design tools & simulation

SIMULATION MODELS Download
SBOM863A.TSC (31 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOM864A.ZIP (6 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOM931A.ZIP (35 KB) - Spice Model
SIMULATION TOOLS Download
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 (...)
Features
  • 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
  • (...)
SIMULATION TOOLS Download
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

Reference designs

REFERENCE DESIGNS Download
LIDAR Pulsed Time of Flight Reference Design
TIDA-00663 — 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
LIDAR-Pulsed Time-of-Flight Reference Design Using High-Speed Data Converters
TIDA-01187 — 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Wide Bandwidth Optical Front-end Reference Design
TIDA-00725 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Reference Design for Extending the OPA857 Transimpedance Bandwidth
TIDA-00978 — 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN (RGT) 16 View options

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