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ADS4249: UNUSED Pin and differential input

Bertran Ziyadov
Prodigy 10 points
Part Number: ADS4249

Hello,

I have a few questions regarding the differential analog to digital converter ADS4249. 

1. UNUSED Pin - should I let this pin float or tie to ground?

2. The ADC has differential inputs (INM, INP), but I have a single ended bipolar signal. I will have to convert it to a differential one and offset it by VCM, right?

Thanks