• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 21 subscribers
  • Views 253 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CDCE62002 LVCMOS input

Ivan Ivanov1
Prodigy 30 points


Hi, Is this part of sheme correct or not?

I use next configuration:

reg0: DC58007

reg1: 9F87806

Fin=20 MHz

R=1

I=4

P=5

F=80

Fout=50 MHz

O=8

Loop Filter: R2=10 Ohm, C2=44uF, C1=1uF.

What values of filter elements are you recommend me to use?

  • 0
    TI__Expert 4970 points

    Ivan,

    Since you are using an LVCMOS_3.3 Input, you should follow the recommendations on page 4 of the datasheet: Pin 30 should be pulled to ground through a 1 kΩ resistor.

    Pins 29 and 2 look OK.

    With regards to the loop filter and register settings, depending on what kind of loop response you are looking for, the results can vary. The software GUI tool in the software section of the CDCE62002 product folder on the TI Website is very helpful. Please use this to verify your loop filter and register values. Should you find any discrepencies, please reply with the results and I can help you out further. Thanks!

    Regards,

    Brandon Vonk