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ADL5315 bandwidth

Question asked by nafran on Nov 4, 2015
Latest reply on Nov 11, 2015 by jdobler

I'm interested in using the ADL5315 to monitor the DC power on an extended InGaAs photodiode. The incident light will have a DC component around 100 uW and a variable level AC signal at 50 kHz. The photodiode will be biased at 1V. We have a standard TIA design for measuring the AC, but bandwidth limitations with regard to I-inpt current in the datasheet has me concerned the ADL5315 may not be able to keep up with the AC component. Am I misinterpreting this spec? Is additional capacitance recommended at the photodiode to provide high frequency performance?

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