1.25V and the input voltage is applied to VINPX (Fig. 27). What is the voltage
range on VINPX and LSB value in millivolts?
The data sheet gives 1.64375Vp-p input voltage (measured differentially). This
means the absolute voltage input has to account for the 1.25V reference:
1.25+/-1.64375/2 V for Figure 27 configuration
As for the LSB value, the bottom transfer function of Figure 8 (single ended)
should be used because Vref*0.6575=1.64375/2. Then, the digital output is
function of Data Mode/Mixed Mode bits: 16 or 15 bits.