I was thinking of using a SI570 programmable oscillator as replacement
for the 25Mhz crystal eg. used by the AD9910.
1) I can use the SI570 as an external oscillator?
2) with the internal muliplier I can reach 1Ghz?
3)But since the SI570 is also a DDS with spurs and
giving a square wave. How would the output
signal behave according spurs and noise?
The overall question is then, is an SI570 usable
for usage in combination with a DDS.