ZHCSJS8 May 2019 ADS7138
ADVANCE INFORMATION for pre-production products; subject to change without notice.
The ADC output is in straight binary format. Equation 1 computes the ADC resolution:
where
Figure 3 and Table 4 detail the transfer characteristics for the device.
INPUT VOLTAGE | CODE | DESCRIPTION | IDEAL OUTPUT CODE |
---|---|---|---|
≤1 LSB | NFSC | Negative full-scale code | 000 |
1 LSB to 2 LSBs | NFSC + 1 | — | 001 |
(AVDD / 2) to (AVDD / 2) + 1 LSB | MC | Mid code | 800 |
(AVDD / 2) + 1 LSB to (AVDD / 2) + 2 LSB | MC + 1 | — | 801 |
≥ AVDD – 1 LSB | PFSC | Positive full-scale code | FFF |