what is the maximum count of N counter in ADF4116??

what is the maximum count of N counter in ADF4116??

hey thanks buddy,i am clear with your answer.Also i am confused why they have specified prescaler as 8/9?what to do your above calculations with this fractional ratio?can you please elaborate?

Also i forgot to reply on your answer about my ADF4001 query.so belated thanks and ADF4001 is working nicely.Now i want to upgrade to ADF4116 for better comparison ratio.So thanks again for ADF4001 & for above calculations.

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The prescaler is needed to divide down the RF input to a frequency that the rest of the N divider can handle. The prescaler either divides by 8 or 9 depending on what is needed. This is all taken care of internally.

ADF4116 is an integer-N PLL so it doesn't really have a "fractional" ratio. The output frequency must be an integer multiple of the PFD frequency. The attached article will explain more. If you want a fractional part, look into the ADF4153A.

If you're sticking with an integer-N PLL, look into the ADF4106. It's a better part than the ADF4116.

N = BP + A.

Max B = 8191. Max A = 31. Max P = 8.

Max N = (8 × 8191) + 31 = 65559.