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ADPD4100 Chopping mode

Category: Software


I'm working with EVAL-ADPD4100: 

I have configured the device using the following parameters:

  • Mode: Continuous
  • Number of pulses: 4
  • Chopping: +-+-
  • Signal size: 4

I am curious to know why the output reaches saturation at a value of 32768 instead of the expected value of 65536.

I got also the same issue for number of pulses = 8, the saturation occures at 65536 instead of 133112.

In each case I got one bit less than I expect. 

Could you kindly explain this to me?

Thank you.