20MHZ-30MHZ Oscillator Choices

[umesh49]

Hi,
I had been using a quartz oscillator for one of design. Due to some failure modes, I am looking for some oscillator working on different principle than Quartz.

This Quartz oscillator goes in high frequency oscillation if any of load capacitor shorts due to any failure. These high oscillation cause my micro controller to behave very strange. I am looking for an clock generation solution which may have different failure mode in a case of output open/short.

I search some, which works on MEMS technology. I was looking for some RC ones, but could not find any yet. I need oscillator for automotive domain.

Regards,
Umesh

 

[fun2design83]

quartz is one of the best you can get in this class, in terms of temperature stability, .... you can use oscillator like this one: https://www.frequencymanagement.com/html/oscillators.html

 

[ads-ee]

How about a silicon oscillator? https://www.linear.com/product/LTC6905. They also seem to be available in the automotive extended temp range (-40C to 125C).

 

[D.A.(Tony)Stewart]

An open solder/cap failure could cause an overtone high freq resonance.
A short would stop the clock.

I would choose a reliable 1ppm TCXO $1 and have a sanity timer for clock errors

 

[Warpspeed]

There is a lot more to the design of crystal oscillators than many people realize.

For high reliability over a wide temperature range a crystal oscillator module is recommended, as the people that build these have full control of the crystal itself, its parameters, and the design of the oscillator circuit.

 

[Ishaan Karnik]

Why don't you try **broken link removed**!!!

 

[D.A.(Tony)Stewart]

An open solder/cap failure could cause an overtone high freq resonance.
A short would stop the clock.

I would choose a reliable 1ppm TCXO $1 and have a sanity timer for clock errors

This is another almost drop in replacement, wide temp 10 ppm $0.60
MEMS crystal osc.

https://www.abracon.com/Oscillators/ASDMB.pdf

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Why don't you try **broken link removed**!!!

Good for PLL clock but expensive.