Dear All
The Doc (TMS320x2802x, 2803x Piccolo Analog-to-Digital Converter (ADC) and Comparator)
What the "The total sampling time is found by adding the sample window size to the conversion time of the ADC, 13 ADC clocks." means?
Thanks for any helps.
Hank
The original contents:
1.3.1 ADC Acquisition (Sample and Hold) Window
External drivers vary in their ability to drive an analog signal quickly and effectively. Some circuits require
longer times to properly transfer the charge into the sampling capacitor of an ADC. To address this, the
ADC supports control over the sample window length for each individual SOC configuration. Each
ADCSOCxCTL register has a 6-bit field, ACQPS, that determines the sample and hold (S/H) window size.
The value written to this field is one less than the number of cycles desired for the sampling window for
that SOC. Thus, a value of 15 in this field will give 16 clock cycles of sample time. The minimum number
of sample cycles allowed is 7 (ACQPS=6). The total sampling time is found by adding the sample window
size to the conversion time of the ADC, 13 ADC clocks. Examples of various sample times are shown
below in Table 1.