[time-nuts] 32.768Khz Crystal/Resonator suggestions.

paul swed paulswedb at gmail.com
Fri Nov 1 23:25:04 UTC 2013


Kind of scratching my head on that also some blade?
Regards
Paul


On Fri, Nov 1, 2013 at 5:50 PM, Volker Esper <ailer2 at t-online.de> wrote:

> Hi Dan,
>
> I beg your pardon for being so curious, but where do you have to put
> electronics in a thousand G's at 100Hz?
>
> Thank you
>
> Volker
>
>
>
> Am 01.11.2013 17:30, schrieb Dan Kemppainen:
> > Hi all,
> >
> > I've got a project upcoming that will require a frequency of 32.768 Khz
> > in a harsh environment (Imagine a thousand G's at 100Hz with 150 Deg C
> > temperatures). Also, this thing needs to be small, 2mmx1.5x1.5mm or so.
> > It also has to be low power. Frequency stability is probably less of a
> > concern than just surviving (some frequency error vs. temp can be
> > trimmed out with other smarts in the design.
> >
> >
> > In the past, crystals just haven't liked surviving due to the
> > construction. Have had good luck with ceramic resonators at higher
> > frequencies (50Mhz and up). I've also looked at silicon oscillators,
> > which will work in the application, however with the chip and associated
> > resistors/caps they get a little bigger that what I was hoping for.
> >
> > Is anyone aware of a frequency source (crystal/resonator or other) in a
> > small package that is robustly mounted?
> >
> > Or are there any ceramic resonators available that are in small packages
> > in those low frequencies? I checked the big distributors, and did not
> > have any luck.
> >
> >
> > Dan
> >
> >
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