OPA857EVM-978

OPA857 Bandwidth Extension Evaluation Module

OPA857EVM-978

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Overview

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 design, external resistors are added in parallel with the internal resistors to take advantage of the high-speed amplifier core to extend the transimpedance bandwidth of the amplifier.

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
Transimpedance amplifiers
OPA857 Ultralow-Noise, Wideband, Pseudo-Differential Output Transimpedance Amplifier OPA857-DIE Low-Noise, Wideband, Selectable-gain, Transimpedance Amp
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Evaluation board

OPA857EVM-978 – TIDUBX71_TIDA-00978A

TI's Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

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Type Title Date
* User guide Extending Bandwith of the OPA857 Design Guide Jul. 25, 2016
More literature OPA857EVM-978 EU Declaration of Conformity (DoC) Jan. 02, 2019

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