Transimpedance Amplifier Circuit

(ACTIVE) CIRCUIT0020

Description & Features

Technical Documents

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Description


The transimpedance op amp circuit configuration converts an input current source into an output voltage. The current to voltage gain is based on the feedback resistance. The circuit is able to maintain a constant voltage bias across the input source as the input current changes which benefits many sensors.

Features
  • Uses a JFET or CMOS input op amp with low bias current to reduce DC errors
  • A bias voltage can be added to the non-inverting input to set the output
  • Operates within the linear output voltage swing (see Aol specification) to minimize non-linearity errors

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Technical Documents
Application notes (3)
Title Abstract Type Size (KB) Date
PDF 141 01 Feb 2019
PDF 153 16 May 2017
PDF 3268 25 Sep 2012

Development Tools (1)

Name Part Number Tool Type
SPICE-based analog simulation program  TINA-TI  Circuit Design & Simulation 

Design Kits & Evaluation Modules  ( 1 )

Name Part Number Tool Type
Universal Do-It-Yourself (DIY) Amplifier Circuit Evaluation Module  DIYAMP-EVM  Evaluation Modules & Boards 

Reference Designs  ( 2 )

Name Part Number Tool Type
1 MHz, Single-Supply, Photodiode Amplifier Reference Design  TIPD176  TI Designs
High Speed, Linear Transimpedance Reference Design  TIDA-01350  TI Designs

TI Devices (2)

Part Number Name Product Family
OPA145  5.5 MHz, High Slew Rate, Low-Noise, Low-power, RRO Precision JFET Operational Amplifier  Operational amplifiers (op amps) 
OPA170  36V, microPower, Rail-to-Rail Output, General Purpose Op Amp in MicroPackages  Operational amplifiers (op amps) 

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