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

Table 1.
Standard Operating Conditions (unless otherwise stated)
Param No. Sym. Characteristic Min. Typ. † Max. Units Conditions
AD20 TAD ADC Clock Period 1 9 μs Using FOSC as the ADC clock source ADOCS = 0
AD21 2 μs Using FRC as the ADC clock source ADOCS = 1
AD22 TCNV Conversion Time(1) 11+3TCY TAD Set of GO/DONE bit to Clear of GO/ DONE bit
AD23 TACQ Acquisition Time 2 μs  
AD24 THCD Sample and Hold Capacitor Disconnect Time μs

FOSC-based clock source

FRC-based clock source

* - 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.

  1. 1.Does not apply for the ADCRC oscillator.
Figure 1. ADC Conversion Timing (ADC Clock FOSC-Based)
Figure 2. ADC Conversion Timing (ADC Clock from ADCRC)
  1. 1.If the ADC clock source is selected as ADCRC, a time of TCY is added before the ADC clock starts. This allows the SLEEP instruction to be executed.