Why does ADA4528-2 have twice as much noise as OPA2188 in our circuit?

According to the data sheets OPA2188 has more than twice the noise as ADA4528-2. But the test results are just the opposite. ADA4528-2 may have more current noise. But the calculated current noise cannot explain what observed.

0 ADIApproved

on Nov 2, 2015 6:23 PM
Hi Daniel,

Can you provide more details of your setup? Also a screenshot of your circuit will be great.

Thanks,

Phil
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0 GeneralMo on Nov 4, 2015 12:48 AM

There is a 10Meg resistor in the feedback loop. 10Meg X 10 pA = 100 uV p-p. But the noise is 2mV p-p.
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0 FormerMember on Nov 4, 2015 1:32 AM

Schematic?

How are you calculating current noise?

Harry
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0 FormerMember on Nov 4, 2015 3:51 AM

Schematic?
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0 EZAdministrator

on Aug 2, 2018 3:15 PM
This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

Thank you,
EZ Admin
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