[time-nuts] VCXO help

[Tijd Dingen]

Well, I know Geraldo Lino de Campos on this list is using an ICS670-03 for
this purpose. For me personally that part is too jittery by about a decade,     
      
but for your purpose it might just be the right compromise. Certainly has a
friendlier package.

datasheet:
http://www.idt.com/products/getDoc.cfm?docID=18461996

Slight detour about soldering QFN's for prototyping. It is not /that/ bad.
I will admit that when given the choice between QFNs and TSOPs I will pick
the latter, but QFNs are do-able. All it takes is patience and a Can-Do   
attitude. Well, mainly patience really. ;) You can do those QFNs for example
dead bug style on a solid copperclad ground plane. The trick then is to use 
aluminum foil to cover the pads you already soldered, and fluxfluxflux.
You can put the decoupling caps real close in a sort of stonehenge around it.
Like I said, requires a bit of patience, but it's fun when it actually works,   
plus you get better at it pretty fast. :)

regards,
Fred


"Bert Kehren" wrote:

> Thanks for the info Fred
> The problem is the package. Looking at the Cirrus Logic CS 2300-CP and use  
> a bubbler. Since I start out with 5 or 10 MHz there must be something out 
> there  that can be soldered.