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AD7417: unused inputs

What should we do with the unused inputs?

 

I assume you refer to the analog inputs. Connect then to a known voltage within
the input range - such as ground. As a general rule, for any ADC with
multiplexed inputs, do not leave any inputs floating. If inputs are left
floating, this can cause charge injection to the substrate and degrade the
performance of the ADC as a whole.

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