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AD5933 - noise occurrence at 40 and 80 kHz

Question asked by JohnJrW on Aug 27, 2015
Latest reply on Sep 8, 2015 by JohnJrW

Hello guys,


I have implemented AD5933-based impedance measurement device according to the CN-0217. I usually used it for single measurements on the each frequency in the sweep, but now I would like to perform more measurements on the same frequency. I found very odd behavior in R=220 and C=1n measurements, as it is shown in the attached figures.

Any suggestions?