Article ADA4350: What is the current noise contribution in my TIA design?

Question

What is the current noise contribution in my TIA design?

Answer

Current noise contribution in the ADA4350 is negligible most of the time,
unless it is used in a high temperature and high feedback resistor combination
(e.g. Rf > 100 kÙ at 85C). If this becomes an issue, one can use the
formula

where fs is the signal frequency, to estimate the current noise
contribution.

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