SLAS887A September 2014 – May 2018
There are up to four independent 24-bit sigma-delta ADCs. Each converter is designed with a fully differential analog input pair and programmable gain amplifier input stage. Also the converters are based on second-order oversampling sigma-delta modulators and digital decimation filters. The decimation filters are comb-type filters with selectable oversampling ratios of up to 256.
The SD24 converters can operate with internal reference (SD24REFS = 1) or with external reference (SD24REFS = 0). When SD24 operates with internal reference the VREF pin must not be loaded externally. Connect only the recommended capacitor value (CVREF) at VREF pin to AVSS (see Table 5-19).