OPA365: The input impedance of OPA365

diverger

Expert 1429 points

Part Number: OPA365

Hi,

OPA365 is an OP with CMOS input. What's the input impedance we can expect?

Thanks.

over 5 years ago

0 Michael Steffes over 5 years ago

Guru 48395 points

Well the resistance is probably too high to measure, but the capacitance is more important in this case,

0 Michael Steffes over 5 years ago in reply to Michael Steffes

Guru 48395 points

And actually, looking at those numbers, seems odd - normally, the diff C is lower than the common mode C. You could test the model but it is not always matching the part on these items,

https://www.planetanalog.com/input-impedance-extraction-and-application-for-high-speed-amplifiers-insight-9/#

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OPA365: The input impedance of OPA365