No I haven't done any FFT yet I'm pretty new to this. Basically, I'm just trying to evaluate the accuracy of the ADC using a sine wave and find out what its limitations are. The ADC is a TI ADS62P22.
The important question I guess I have is, is this a signal integrity problem or is the range output of the ADC going to be between 0-15 clock cycles from the actual result on outputting the actual peak values. Basically, is it normal for an ADC to give multiple max/min measurements that can span up to 8 clock cycles away. For example, I have a 0 crossing at 155 cycle and another zero crossing at 480 cylce. If the ADC gives me max values at 300, 302, 310, 320, and 324 cycles where the midpoint is 317-318, is that normal ADC operation?