I'm wondering if I should tie VeREF+ and/or VREF-/VeREF- to ground. Currently I have VREF-/VeREF- tied to the ground of my Vref decoupling cap, and VeREF+ floating.
I know it is good practice to tie unused digital inputs to ground (or set them to outputs in software), to prevent them from "flapping in the wind". Does this hold true for the reference input pins as well? Are there any analog buffers that could cause some on chip noise?