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AD5933 + AD8606 Nonlinearity problem

Question asked by Walecki on May 6, 2014
Latest reply on Jun 6, 2014 by musach

Hello,

 

I developed system for complex impedance measurement based on CN-217 and I have non linearity problem in inductance measurement. What is maximum reactance which can be attached as load on AD8606 or there is problem with AD5933 in "pure inductive" load? Attached inductance is 50 mH.

 

Please find attached picture with results where may be seen and value of feedback resistor. This value is changed according to value of impedance under test.

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