AD9851 DDS Function Signal Generator 0 - 50MHz DDS signal source.
AD9851 using the advanced DDS direct frequency synthesis technology , It can produce pure spectrum, frequency and phase are programmable control and stability good sine wave . Relative to internal added six AD9850 frequency multiplier, and the reference clock has only 30 MHZ to 180 MHZ system clock, design of 0 ~ 70 MHZ, effectively reduce the external phase noise of frequency source.
Here is some details of signal purity at 50 and 40Mhz
Scope view at 50Mhz
Frequency at 40Mhz