LMK03806, design help

Terry16065

Expert 1185 points

Other Parts Discussed in Thread: LMK03806

Need design support for this part.

Is there a reference design/schematic available that uses this part?
The data sheet doesn’t specify what to do with the CPout pin (pin number 42)… do I leave it open or do I terminate in some fashion?
There are 13 VCC pins associated with this device… should they all be fed from the same 3V3 voltage rail or do any of them (i.e. VCC9, power supply for the PLL) require special handling (i.e. pi filter, etc)?

over 13 years ago

0 Jonathan Kolbrak over 13 years ago

TI__Intellectual 915 points

Please see the following web page and check out the "LMK03806 Users Guide." This has sample schematic, BOM, Layout, etc for the LMK03806.

http://www.national.com/pf/LM/LMK03806.html#Boards

Regarding, CPout, (pin 42), this is for a loop filter and an example filter is in the Users Guide, page 26.

Included on page 25 of the Users guide is a recommended configuration for the Vcc pins and bypassing of them.

Let me know how it turns out.

0 Terry16065 over 13 years ago in reply to Jonathan Kolbrak

Expert 1185 points

Thanks Jonathan. I didn't see these on the TI website, perhaps not everything has been moved over yet. I'll know to check the National site in the future :)

Clock & timing

Clock & timing forum

LMK03806, design help