In Rev C of the AD9361 datasheet (let me know if I need to find a newer one). It says:
VDD_GPO Supply Nominal Setting is between 1.3 and 3.3V (the table in SUPPLY CHARACTERISTICS).
In the Pin functions, it says:
2.5 V to 3.3 V Supply for the AUXDAC and General-Purpose Output Pins.
so, does that mean if I want the GPOs & AUXDAC to function, the min VDD_GPO supply is 1.3V or 2.5V?