hi,

when using ADF4350 with INTEGER-N divider, the "prescaler (4/5 - 8/9)" is still active ??

in other words:

ref 10MHz

PD 10MHz

freq: 3500 MHz

-----

N should be 350 ...

How set 350 to "N" divider ? -> "INT" = 350 .. "FRAC" = 0 .. "MOD" = 0 .. "OUT DIVIDER" =1 ?????????????

If yes, the "PRESCALER BIT" in R1 must be set or clear ?????????

i am confused and the datasheet is not so clear about the "prescaler" ..

many thanks in advance

best regards

MAuro Bernardetto

In this case, the prescaler bit should be set, making the prescaler 8/9.

If you look on page 18 of the datasheet, http://www.analog.com/static/imported-files/data_sheets/ADF4350.pdf#page=18

in the

Prescaler Valuesection, it says, for frequencies greater than 3 GHz, prescaler must be 8/9.