1, Could you share that how to calculate the VOUTX(DAC output) when we define regarding VREFIN=VDD=+4V, DACn_DATA=255(DEC)?
2, Would be it possible to output (Vout X) of 3.984375 V? Customer calculates it as below due to Rail-to-Rail device.
255/2^6×4=3.984375 V
From 8.3.1.1 : VoutX = (DACn_Data/2^(n)) * Vref IN