LMX2820EVM: Modulator Order and setup

Hi Chen,

You can use TICS Pro, change the PLL_DEN to the highest value, then input the input and output frequency, the tool will do the calculation for you. However the tool is limited to 10 decimal places, you will need to do some calculation to see how close is the result to your desired frequency.

Hi Chen,

EVM user's guide has the schematic. 

MULT frequency requirement is available in the datasheet.

With 26MHz input, the max. fpd you can get is 52MHz.

Hi Chen,

Even if 26MHz input is acceptable, you need x7 to meet the output frequency requirement. 

I don't see a real benefit here to use the MULT. Use the Doubler to get 52MHz fpd.