AnsweredAssumed Answered

AD7745 calibration procedure

Question asked by Sangi on Mar 10, 2017
Latest reply on Jul 7, 2017 by Wa$iM

Hi everybody,

I'm evaluating the AD7745 and since it gives me wrong values I am going to calibrate it. Unfortunately I did not understand the procedure. Datasheet says I can connect a "zero-scale capacitance", but what does it mean? I tried with a short but it saturates, what is a zero-scale capacitance?

 

The second method is to "calculate and write the offset calibration register value", yes but with which value? What I have to calculate?

 

Thank you for your help.

 

Sangi

 

ad7745

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