I want to use AD725 and made circuit to automatically detect NTSC and PAL, so that after that it will feed correct crystal oscillator to AD725.
I have 2 options:
1- get 2 oscillators, feed them through SPDT analog switch and make the circuit activate either one automatically.
2- as seen in this image. I got LTC1799 and made 2 resistor lines according to its datasheet to have 14.318180MHz or 17.734475MHz (please check if my calculations are correct). Here this part will deliver the correct frequency instead of having 2 oscillators now I got only one. Still going to use the analog switch as seen.
My issue is that option 2 is expensive and I would like to have option 1 or anything cheaper than option 2. Most oscillators here are 3.3v and most of them are out of stock.
I selected these 2 oscillators:
are they good? they are 3.3v and do not go to 5v, are they good enough with ad725 or the 2nd option is better?