AnsweredAssumed Answered

phase calculation using AD5933

Question asked by Preetham on Oct 10, 2013
Latest reply on Jul 31, 2015 by Patrick22

I want to know how to calculate the phase of complex impedance. When i apply the phase formula table in page 21 ad5933 data sheet its not giving the same answer as it was suppose to give using AD5933EBZ rev.C.
Neither it gives the same answer when the formula from UG-364 is applied I am unable to get the phase.
I use PIC32MX775F256H.

 

PLEASE SUGGEST ME A WAY TO SOLVE THIS.

 

DATA:

 

for C=3.3nF, freq=4000Hz, GF=6.8e-7, calibration resistor=150    

 

  Imp            Phase             Real           Imaginary        Magnitude   

9335.63        -83.1866          -157                -20                 158

 

How would i get the phase -83.1866 using real=-157 and Imaginary= -20????????

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