SBAS949A February 2020 – February 2021 ADS131M06
Leave any unused analog inputs floating or connect them to AGND.
Do not float unused digital inputs because excessive power-supply leakage current can result. Tie all unused digital inputs to the appropriate levels, DVDD or DGND. Leave the DRDY pin unconnected or connect it to DVDD using a weak pullup resistor if unused.