Hi,
Sampling rate, is the amount of samples that you must take in order to obtain back your original signal, and it is calculated according the sampling theorem of Nyquist:
You must know the maximum frequency of your signal and at least the sampling frecuency must be 4 times the more times the better, usually 8 times is great.
For datasheets you can get the clock range 50 to 800kHz
SPS?????????????????????????????????????????????????????????????????????
Do You mean PSS or Power supply sensitivity, and refers of how affects the changes in power supply to the conversion.
Throughput Rate is the maximum continuous conversion rate of the ADC