I have searched the latest datasheet and not found the typical current consumption of the Vref supply.
In a relatively simple 21565 design, the only high current requirement will be the 1.0V core and the datasheet addresses this well.
It seems to me that the Vref supply could be created with a small LDO supplied from the 3.3V Vext supply. Vadc would also be connected to this supply even though it is not useful with the current silicon.
I know this can be measured with an EZ KIT, but I don't have one.
So, does anyone have a number?