SBASA81B January 2023 – October 2024 ADS9815 , ADS9817
PRODUCTION DATA
The ADS981x outputs 18 bits of conversion data in either straight-binary or binary two's-complement formats. The format for the output codes is the same across all analog channels. The format for the output codes can be selected using the DATA_FORMAT field in address 0xD in register bank 1. Figure 6-3 and Table 6-6 show the transfer characteristics for the ADS981x. The LSB size depends on the analog input range selected, gain-error calibration, and system gain error calibration as shown in Equation 2.
where:
RANGE | +FS | MIDSCALE | –FS | LSB |
---|---|---|---|---|
±2.5V | 2.5V | 0V | –2.5V | 19.07µV |
±3.5V | 3.5V | 0V | –3.5V | 26.70µV |
±5V | 5V | 0V | –5V | 38.15µV |
±7V | 7V | 0V | –7V | 53.41µV |
±10V | 10V | 0V | –10V | 76.29µV |
±12V | 12V | 0V | –12V | 91.55µV |