I am trying to feed a 5V signal to AD7705 which is a 16 bit ADC and expects differential inputs. Do I need to divide my 5V signal using bridge and then feed it to the ADC or can I use it as a single ended ADC.
What confuses me is the need of Vref as 2.5V. I understood that the differential inputs don't need and Vref as the inputs are compared in respect to each other.
If I do need to split up my signal, then I assume a four resistor bridge of same values should give me center tapped output to feed into the differential inputs. What standard grade "R"values should be selected? The ADC has a buffer in built, thus input impedance is not much issue, I guess.