AD4000 reference voltage and power consumption


A couple of questions about AD4000 design:

It is a 1.8V device; however, the current consumption is not mentioned anywhere in the DS (or I am not looking hard enough). On page 6 of datasheet, power dissipation numbers are given for different sampling rates. Can one assume this to be power consumption (vs power dissipation) numbers also?

In user guide for AD4000 UG-1042 a buffered Vref ADA4807-1 is used. Can it be replaced with an alternate like ADR381? If not, what might be a good candidate for reference voltage?