OPA928: Tested my assembly with the OPA928 amplifier

LAURENT IFERGANE

Part Number: OPA928

Tool/software:

We've implemented a setup that incorporates the OPA928 and would like to test it on very low currents, such as the Femto Amp, around 20fA. What photodiode reference would you recommend?

Thank you.
Have a nice day.

5 months ago

0 Raymond Zhang1 5 months ago

TI__Guru* 77501 points

Hi Lauren,

LAURENT IFERGANE said:
What photodiode reference would you recommend?

In terms of TIA reference design, here are two TIA reference design. Also I included OPA928EVM reference design.

https://www.ti.com/lit/ug/tidu535/tidu535.pdf?ts=1745223336948

https://www.ti.com/lit/an/sboa291a/sboa291a.pdf?ts=1745162525938

https://www.ti.com/lit/ug/sbou282a/sbou282a.pdf?ts=1745238704667

If you have other questions, please let me know.

Best,

Raymond

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OPA928: Tested my assembly with the OPA928 amplifier