The ADS1601 seems to want DVDD = 3.0 V nominal. It has a range of 2.7 – 3.3 V, and is tested at 3.0 V.
Is it OK to have DVDD = 3.3 V nominal? (+/- 3% I suppose, which would make it 3.4 V max)
I can put in a 3V regulator, but I am using 3.3V for other logic and stuff.