- Refer to ADC Electrical Characteristics for the values of Rin and CS/H
- Refer to Digital IO Electrical Characteristics for the value of CI
- Cpar and Rpar represent the parasitic capacitance and resistance of the external ADC input circuitry
Use the following equations to solve for the minimum sampling time (T) required for an ADC conversion:
- Tau = (Rpar + Rin) × CS/H + Rpar × (Cpar + CI)
- K= ln(2n/Settling error) – ln((Cpar + CI)/CS/H)
- T (minimum sampling time) = K × Tau