We are implement LTC6946 and try to improve the system phase noise performance by design loop filter.
May I know if we could apply 3rd order filter to meet total noise under -100dBc? It seems we could only apply 2rd order filter in FracNWizard.
Could you please advise the 3rd order filter values ( Rz, Ci, Cp, R1, C2) and total noise under -100dBc if possible? Thanks in advance!
Our setting as below
Loop BW: 350kHz
N Div: 256