ADUCM360/361: Configuring unused ADC inputs

Document created by analog-archivist Employee on Feb 23, 2016
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I have some unused ADC inputs and GPIO pins that are not used in my design. 
How should I
configure these pins to minimize current consumption?


ADC inputs - tie these directly to ground. The leakage current on the analog
pins is low –
typically 1nA.  The digital pins have an internal pull-up to IOVDD. This
pull-up is typically 50Kohms. Because of the pull-ups, these pins can be left
unconnected. Another option is to tie them externally to IOVDD to minimize the
current flowing through the pull-up.