Crystal, Resonator, Oscillator query

[abhishek.2138]

For one of automotive electric vehicle project (high power DC-DC converter), we need 20MHz external clock for microcontroller.
So, what can be better, what should I consider -

1) Crystal (with external load caps) or
2) Ceramic resonator (with integrated load caps) or
3) Crystal oscillator?

Cost wise oscillator is costly also it needs external supply, but it will generate clean waveforms.

Can anyone suggest which option best suited & why? What are the pros & cons of each above option?

 

[KlausST]

Hi,

you talk about "better" and "best" .. but don´t state in which way better.

Good looking, availability, lowest power, best accuracy, lowes jitter, best duty cycle, lowest temperature drift and many more.
lowest part count, lowest PCB space, widest supply voltage range, highest temperature range, long live, most reliable, radiation tolerant...

I have the best shoe, the best wife, the best drink, the best dish ... while the next guy says his things are the best.

Klaus

 

[abhishek.2138]

Hello KlausST,

In terms of frequency accuracy, stability, aging & for automotive applications which is preferred quartz crystal or ceramic resonator.
How to choose wisely between crystal vs resonator?


Regards,
Abhishek