Reference Design for Extending the OPA857 Transimpedance Bandwidth

(ACTIVE) TIDA-00978

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Key Document

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 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

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Bill of Materials (BOM)

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Part Number Buy from Texas Instruments or Third Party Buy from Authorized Distributor Status

OPA857EVM-978:
TIDUBX71_TIDA-00978A

$99.00(USD)


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TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
OPA857  Ultralow-Noise, Wideband, Pseudo-Differential Output Transimpedance Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
OPA857 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1207 25 Jul 2016 100
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 4080 15 Aug 2016 17
ZIP 243 15 Aug 2016 6
PDF 781 15 Aug 2016 5
PDF 178 15 Aug 2016 2
PDF 62 15 Aug 2016 6
PDF 271 15 Aug 2016 10

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