Transimpedance Amplifier Calculator
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Electrical & Electronics

Transimpedance Amplifier Calculator

Convert sensor current to voltage, choose a feedback resistor and estimate capacitance and bandwidth.

01

Your inputs

Use usable output voltages from the datasheet, not supply rails. The bounded output is an estimate.

Single-pole estimate. Include sensor, op-amp and stray capacitance; verify noise, input range, slew rate and stability.

Positive current flows into the inverting input; Vout = Vref − Iin × Rf.

TI SBOA122

02

Your results

Feedback resistor
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Ideal resistance
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Ideal output voltage
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Bounded output estimate
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Estimated feedback capacitance
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Estimated small-signal bandwidth
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Current range for output limits
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Formula—

How to use this tool

  1. Thermal model · Input current · Reference voltage
  2. Feedback resistor · Total input capacitance · Gain-bandwidth product
  3. Your results · Formula · Print results