Can the vdd and vref of AD5624 be of different voltages?.Like vcc/vdd be 3.3V and Vref be 5v.so that there is no need for a volatge level shifter for the ic from 3.3v to 5v.
VDD must be always higher than Vref, as the absolute maximum ratings show.
Said that, you can interact receive data...
But you probably cannot readback data... just your uC input levels.
Retrieving data ...