57.8.4.1 Differential Mode (12-bit mode)

A differential input voltage VIN = VINP - VINN can be applied between two selected differential pins, e.g. AFE0_AD0 and AFE0_AD1.The ideal code Ci is calculated by using the following formula and rounding the result to the nearest positive integer.

C i = 4096 V VREFP × V IN × Gain + 2047

For the other resolution defined by RES, the code Ci is extended to the corresponding resolution.

The table below is a computation example for the above formula, where VVREFP = 3V.

Table 57-31. Input Voltage Values in Differential Mode, Nonsigned Output
Ci Gain
Signed Nonsigned 1 2 4
-2048 0 -3 -1.5 -0.75
0 2047 0 0 0
2047 4095 3 1.5 0.75