Power filtering and reference voltages for ADC/DAC
Yes it can and here's an example: -



Vdd is 2.5V and the reference input can also be 2.5 volts. The VIO supply range also encompasses 2.5 volts.

I would feed the reference input first then tee off to the supplies through suitable filtering. Make your reference supply as "strong" as possible so that it doesn't get glitched by the current that is taken by the supply rails.

Even at 500 kSps the total power taken by the chip is 3.5 mW so it is do-able. Regards a suitable reference I have used an LTC6655 with an NPN transistor to give it a bit more drive capability - the LTC6655 has a sense pin and allows this quite easily: -