The full-scale range of the Auxiliary A/D input is ±3 volts. The bit resolution is 0.1 mV. You can expect about 1 bit rms noise in the reading. This noise averages out if you take multiple readings. If you need to read a higher voltage, a resistive voltage-divider can be placed in front of the high-impedance differential input.
|Reading||REAL||The input voltage. Units are volts.|