How to set ADCS bits in ADCCON3 (tomash)

I don't understand how to set the ADCS bits in in ADCON3. The data sheet says that TAD should be min 600 nsbut DS39739A says min 75 ns. Which is correct? I use the FRC with PLL, no division which gives a TCY of 62.5 ns. How should I set the ADCS bits? Pro..