From ADS1278 datasheet
"The IOVDD and DVDD power supplies available directly, bypassing the internal digital filter.
can be tied together if desired (+1.8V)."
But in absolute maximun rating
DVDD, IOVDD to DGND 0.3 to +3.6 V
Is it possible to tie these two pins together in 3.3V? Why ti write specific value +1.8V in the datasheet?
thank you.