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

[Bob Camp]

Hi

There are several possibilities, each of them pretty well tells you what industry is looking for the crystal.

Bob

On Nov 1, 2013, at 7:25 PM, paul swed <paulswedb at gmail.com> wrote:

> 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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