Multiple AD7606 ,data acquisition wrong

Hi  ADI guys,

  We use 4pcs AD7606 for synchronous acquisition, total 32 channel.

  The first and second  piece of AD7606 conversation data is normal ,but Both the first channel of third and fourth piece of  AD7606 data is wrong when CS trigger  ,then recover normal after 800ms .

   Such status occur every 3hours.

  Each AD7606 code is the same.

 

 

 

    

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