Dynamic currents are also present at the ADC analog inputs (pins 18 and 19) of the ADS816x. Use C0G- or NPO-type capacitors to decouple these inputs. With these type of capacitors, capacitance remains almost constant over the full input voltage range. Lower-quality capacitors (such as X5R and X7R) have large capacitance changes over the full input voltage range that potentially cause degradation in device performance.

In Figure 8-8, each multiplexer input has an RC filter that helps reduce settling when switching between multiplexer channels. When not switching the multiplexer, as discussed in Figure 6-12 and Figure 6-13, omit the RC filter.