A single input voltage VIN can be applied to selected pins, e.g. AFE0_AD0 or AFE0_AD1. The ideal code Ci is calculated using the following formula and rounding the result to the nearest positive integer.
The single-ended ideal code conversion formula is:
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:
| Ci | Gain | |||
|---|---|---|---|---|
| Signed | Nonsigned | 1 | 2 | 4 |
| -2048 | 0 | 0 | 0.75 | 1.125 |
| 0 | 2047 | 1.5 | 1.5 | 1.5 |
| 2047 | 4095 | 3 | 2.25 | 1.875 |