57.8.4.1 Differential Mode (12-bit mode)

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

C_{i} = \frac{4096}{V_{VREFP}} \times V_{IN} \times Gain + (2047)

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

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

Table 57-31. Input Voltage Values in Differential Mode, Nonsigned Output
C_i		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