39.4.8 Analog-to-Digital Converter (ADC) Conversion Timing Specifications

Table 39-14. 
Standard Operating Conditions (unless otherwise stated)
Param No. Sym. Characteristic Min. Typ. † Max. Units Conditions
AD20 TAD ADC Clock Period 0.5 — 9 μs Using FOSC as the ADC clock source ADCS = 1
AD21 — 2 — μs Using FRC as the ADC clock source ADCS = 0
AD22 TCNV Conversion Time(1) — 14TAD+2TCY — — Using FOSC as the ADC clock source ADCS = 1
— 16TAD+2TCY — — Using FRC as the ADC clock source ADCS = 0
AD23 TACQ Acquisition Time — 2 — μs
AD24 THCD Sample-and-Hold Capacitor Disconnect Time — 2TAD+1TCY — — Using FOSC as the ADC clock source ADCS = 1
— 3TAD+2TCY — — Using FRC as the ADC clock source ADCS = 0

* - These parameters are characterized but not tested.

† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not tested.

Note:
  1. Does not apply for the FRC oscillator.
Figure 39-10. ADC Conversion Timing (ADC Clock FOSC-Based)
Figure 39-11. ADC Conversion Timing (ADC Clock from FRC)
Note:
  1. If the ADC clock source is selected as FRC, a time of TCY is added before the ADC clock starts. This allows the SLEEP instruction to be executed.