I can't believe I have to ask this here, but I can't seem to make sense of the datasheet.
On page 8 in the spec table, it says 0/AVDD (which is what I want)
On page 23 it says VOUT=(2)(VREF)(x2/2^n) which gives 2.5V at x2=4095 because VREF is 1.25V
My AVDD is 3.3V. What do I need to do to get 0/3.3V out of the channels? Is it even possible?
Is the idea that you run a 2.5V internal VREF and then use the gain trim to scale it down to AVDD? Or is an external VREF at 1.65V the way? Sheesh.