TIASim - Transimpedance Amplifier Simulation.

For some example designs and comparisons to TIASim see One Inch Phototdetector.

Analog Devices has a Photodiode Circuit Design Wizard at https://tools.analog.com/en/photodiode/

• Hobbs, Photodiode front ends
• Transimpedance Amplifiers (TIA): Choosing the Best Amplifier for the Job, http://www.ti.com.cn/cn/lit/an/snoa942a/snoa942a.pdf
• Transimpedance Considerations for High-Speed Amplifiers http://www.ti.com/lit/an/sboa122/sboa122.pdf
  • RF lower than 2 kOhm -> use BJT opamp
  • RF higher than 2 kOhm -> use FET opamp

Open-loop gain, input-referred voltage and current noise, and input-capacitance are modeled for the following op-amps:

These integrated TIAs might be good for comparisons: HMC799 (10kOhm, 700 MHz, TIA), LTC6560 (74 kOhm, 220 MHz)

op-amps that could be added: LTC6268-10

https://www.ti.com/lit/ds/symlink/opa818.pdf

This image compares TIASim predicted bandwidth vs. photodiode capacitance and transimpedance to the datasheet front-page Figure. Note that the TIASim CF values are increased by a sqrt(2) factor. CF is the capacitance across RF.

This image shows measured and predicted dark and bright noise levels for an OPA818 photodetector with 1.2 kOhm transimpedance and 0.7 pF CF. The Photodiode is a Thorlabs FDS015. The -3dB badwidth is >400 MHz.

http://www.ti.com/lit/ds/symlink/opa657.pdf

This OPA657 photodetector with S5791 photodiode and 1 MOhm transimpedance shows 4 MHz bandwidth. Note that this design has no output-buffer, and the TIASim predicted response was adjusted to fit the measurement data by de-rating the op-amp GBWP.

This OPA657 detector with S5793 photodiode and 10 kOhm transimpedance (0.2 pF CF) shows ca 60 MHz bandwidth.

http://www.ti.com/lit/ds/symlink/opa847.pdf

http://www.ti.com/lit/ds/symlink/opa855.pdf