Acquisition time

Acquisition Time is the time that it takes for the ADC to acquire and convert an analog signal to a digital value. The conversion time is a sum of:

(Sample Time) + (Calibration Time) + (Charge Distribution Time) + (Synchronization Time)

Users of SmartGen will only be concerned with the Sample Time that specifies how long an analog input signal must be sampled to obtain a proper value. The sample time is a calculated by:

(2 + sample time control) * ADC Clock Period

And the ADC Clock Period is calculated by:

(4 * (1 + clock divider setting)) / System Clock Period

The ADC Clock Period has a maximum possible frequency of 10Mhz.

Based upon the sample time requirement specified by the user, SmartGen automatically computes values for the sample time control (STC), clock divider setting (TVC), and ADC Clock Period.

The goal of SmartGen is to meet the user’s minimum Sample Time requirement with the highest possible ADC Clock frequency, which implies a low TVC value and high STC value.