LMX2582: VTUNE and CPOUT tuning

Nandini Muralidharan

Part Number: LMX2582
Other Parts Discussed in Thread: LMK6C

Tool/software:

Hi,

PFA - for our PLL implementation. PLL output clock from channel A is 900MHz.

Crossover freq is 3600MHz.

In this case, can you please suggest how the discretes attached to CPOUT and VTUNE needs to be tuned?

Thanks

0 Noel Fung 5 months ago

Hi Nandini,

Since the supply to the LMK6C is 1.8V, its output should be 1.8V clock. R589 should be 0Ω.

Loop filter design depends on your application need, you can use PLL Sim (https://www.ti.com/tool/PLLATINUMSIM-SW) to design the filter.

Clock & timing forum