ZHCSIU4A September 2018 – August 2019 ADS1284
PRODUCTION DATA.
The conversion data can be scaled for offset and gain before yielding the final output code. As shown in Figure 64, the output of the digital filter is first subtracted by the offset register (OFC) and then multiplied by the full-scale register (FSC). Equation 15 shows the scaling:
The values of the offset and full-scale registers are set by writing to them directly, or they are set automatically by the calibration commands.
The offset and full-scale calibrations apply to specific PGA settings. When the PGA is changed, these registers generally require recalculation. Calibration is bypassed in the sinc filter mode.