The figure below shows the timing diagram for the ADC when running in Burst Accumulation mode with the PGA.
1
’ in
the Control A (ADCn.CTRLA) register, the PGA and the analog modules in the ADC will not
turn OFF at the end of the conversion, eliminating the initialization time when triggering
the following conversion. The PGA will stay in the Input Sampling state until a new PGA
sampling occurs.The number of samples to accumulate is set by the Sample Number (SAMPNUM) bit field in the Control F (ADCn.CTRLF) register.
For a Burst Accumulation with the PGA, SAMPDUR must be ≥ 11. The total conversion time (tconv), in μs, is calculated by:
The burst conversion rate (fconv) is calculated by: