Part Number: ADS7042
I am trying to calculate the maximum sampling rate for ADS 7042 ADC. But from the data sheet if I calculate the time I am getting only 996.5ns (1/ (12.5 * 62.5 + 15 + 200 )) for one sample. This will be greater than the sampling rate specified in the timing diagram. I am unable to predict where my calculation went wrong Can anyone figure out that. Also, the acquisition time is not getting added up to 200ns if I calculate individually from the datasheet. 
Hello Chaitanya,
The maximum sample rate for the ADS7042 is 1 MSPS. To sample at 1 MSPS the SCLK frequency must be set to 16 MHz. I have gone through the math similarly to how I presume you did and I understand your confusion since the timing diagram shows an acquisition time that can be less (if using all minimum specifications) than the 200 ns that the datasheet defines.
In order to ensure proper operation and performance, the ADS7042 should be operated at a maximum sample rate of 1 MSPS.
Below I have worked through the equations to find the minimum cycle time. The result is a minimum of 996.25 ns (equivalently 1.0037 MSPS). Since all of the timing specifications were minimum requirements, operating at 1 MSPS is very close to the obtained result.
I hope this helps answer your question. Please reach out if you have any further questions.
Thank you,
Reed Kaczmarek
