3.3 Average and Burst-Average

In Average and Burst-Average modes, the ADC accumulates a set number of samples, then generates the average. To divide the accumulation, the ADC right-shifts the accumulated results by a set number of bits. For proper calculation of the average in these modes, the number of samples acquired must be a power of two, and the number of bits to shift must be a base-2 logarithm of the number of samples, as shown below.

n_{s h i f t} = \log_{2} (n_{s a m p l e s})

The difference between the Burst-Average and Average modes is how the samples are acquired. The Averaging mode acquires a single sample per ADC conversion, whereas the Burst-Averaging mode acquires all the samples back-to-back once the ADC has been triggered.