ZHCST39A December 2022 – September 2023 AFE11612-SEP
PRODUCTION DATA
When the device is configured as a differential input, the differential signal is defined as VDM, as shown in Figure 7-2(a). The differential signal is the equivalent of the difference between the V1 and V2 signals, as shown in Figure 7-2(b). The common-mode input VCOMMON is equal to (V1 + V2) / 2.
When the conversion occurs, only the differential mode voltage (VDM) is converted; the common-mode voltage (VCOMMON) is rejected. This process results in a virtually noise-free signal with a maximum amplitude of –VREF to +VREF for the VREF range, or (–2 × VREF) to (+2 × VREF) for the (2 × VREF) range. The results are stored in straight binary or 2's complement format.