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AD5933 measure resistor || capasitor

Question asked by Doungh on Sep 13, 2012
Latest reply on Oct 15, 2013 by musach

Hi I am taking sweeps of a 100k Ohm resistor paralleled with a 0.1uF capacitor, from 1Hz to 400Hz at 2 V p-p, PGA x1.

 

When the measurement comes back it does not resemble the matematical model of how the impedance should be changing with frequency. I have attached an origin graph of this behavior and I would be very happy if someone could shed some light on why my maths does not add up.

 

Regards,

Ronan

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