It seems there is a wide range for ICVDD specified in the datasheet but there
is no detailed information about it.
It is dependent on how you configure the device, so we would need to see the
key targets of their application (analog signal frequency range, SNR, SFDR).
With that we can make a recommendation on how to best configure the AD9261.
This is a typo error in the ICVDD spec, the max should be 65mA.