TIDA-00978 Reference Design

Texas Instruments

Reference Design for Extending the OPA857 Transimpedance Bandwidth

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.

  • 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

Parts

Part Number Name Companion Part
OPA857 OPA857 Buy Datasheet

Bill Of Materials

Download the bill of materials for TIDA-00978 Download

Schematic

Quickly understand overall system functionality.

Download the schematic for TIDA-00978

Test Data

Get results faster with test and simulation data that's been verified.

Download the test file for TIDA-00978

Other Documents

Title Updated Type Size (KB)
TIDA-00978 CAD Files 15 Aug 2016 ZIP 4080
TIDA-00978 Gerber 15 Aug 2016 ZIP 243
TIDA-00978 PCB 15 Aug 2016 PDF 781
TIDA-00978 Assembly Drawing 15 Aug 2016 PDF 178
TIDA-00978 BOM 15 Aug 2016 PDF 62
TIDA-00978 Schematic 15 Aug 2016 PDF 271