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AD7124 Wrong Read Problem

Question asked by beraicli on Mar 20, 2018
Latest reply on Apr 9, 2018 by JellenieR

Hi,

 

I am driving an AD7124-8 with given driving pattern for RTD measurment in the datasheet. I can reach each register. I both verified the flow from testbench and oscilloscope. Besides, I can observe the excitation current I set on the card.

 

As I can reach any registers, however, I am also reaching and reading something at the "Data Register". The data I obtain is wrong and changes everytime as I hard reset the device. I am sure that I write at PGA, but changing PGA does not change the output of the "Data Register.

 

What might be wrong with that?

 

Thanks in advance,

 

Bera

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