CIRCUIT060040

Transimpedance amplifier with t-network circuit

CIRCUIT060040

Overview

This transimpedance amplifier with a T-network feedback configuration converts an input current into an output voltage. The current-to-voltage gain is based on the T-network equivalent resistance which is larger than any of the resistors used in the circuit. Therefore, the T-network feedback configuration circuit allows for very high gain without the use of large resistors in the feedback or a second gain stage, reducing noise, stability issues and errors in the system.
Features
  • Input: Ii = 0 A to 100 nA
  • Output: Vo = 0 V to 3.2 V
  • BW: f = 10 kHz
  • Supply:
    • Vcc = 3.3 V
    • Vee = 0 V
General-purpose op amps
OPA375 Single, 5.5-V, 10-MHz, low noise (4.6-nV/√Hz), 68-mA output current, RRO operational amplifier TLV9002 Dual, 5.5-V, 1-MHz, RRIO operational amplifier for cost-optimized applications

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Technical documentation

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Type Title Date
* Circuit design Transimpedance amplifier with T-network circuit Mar. 12, 2021
Application note Simplify Transimpedance Applications with High-bandwidth, Precision JFET Op Amps May 21, 2019
Application note Nano-Power Transimpedance Amplifier for Current Output Sensors Mar. 07, 2018
Application note Transimpedance Amplifiers (TIA): Choosing the Best Amplifier for the job (Rev. A) May 16, 2017
User guide 1-MHz Single-Supply Photodiode Amplifier Reference Design Guide Sep. 16, 2014

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