This question is about the performance limit of AD9914.
This is my quatitive analysis of AD9914 based on its datasheet.
- External clock frequency I'm using : 3000MHz
- time base : 1/24 * 3000MHz = 8nsec (I understand that this is the minial time required for switching a frequency to the next step.)
- sweep range : 100MHz
- Frequency step : 100KHz (1000 steps for full range step)
- The best sweep freqeuncy = 125KHz
My estimation is correct?
If yes, is there any method to increase the sweep freqeuncy keeping the sweep range and step?
Any other DDS I can try?
My target sweep freqeuncy is 500KHz.