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ADS7945: Handling of unused analog input terminals

Part Number: ADS7945

Hi support team,

I have a question regarding unused analog input terminals of ADS7945.

If the customer doesn't use a pair of analog input terminals (AINxP, AINxN), can he left them open?
Or is it necessary to take measures such as pull-down or pull-up  and so on?

Sincerely,
M. Tachibana