There are two recommended configurations for basic pinout requirements (see SYSMON Pinout Requirements in Analog Power Supply and Ground). The SYSMON is powered from VCCAUX_PMC (1.5V) and can either use an external 1.024V reference source or the internally generated on-chip reference.
It is recommended to reduce manufacturing costs by using on-chip reference for the ADC by connecting the VREFP pin to GND because the external and internal references deliver similar performance in terms of accuracy and thermal drift, consult the Versal Devices Data Sheets to see accuracy specifications when using external and on-chip reference sources. The following table lists the pins associated with the SYSMON and the recommended connectivity.