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Topic: Low Power Arduino (Read 3 times) previous topic - next topic

Udo Klein

Higher load capacitance implies less pullability. Thus in doubt better precision.

With regard to the callibration: I thought the RC oscillator is much more affected by temperature. Hence a recallibration at startup might be reasonable to improve precision.

Udo
Check out my experiments http://blog.blinkenlight.net

48X24X48X

Quote
Higher load capacitance implies less pullability. Thus in doubt better precision.


Thank you for pointing that out. I will try to find a crystal with lower load capacitance, probably 6pF.

Udo Klein

I don't get your point. If you go for lower load you will get more pullability and thus less precision / stability. Is this what you are aiming for?

Udo
Check out my experiments http://blog.blinkenlight.net

48X24X48X

Quote
If you go for lower load you will get more pullability and thus less precision / stability.


Yes, you are correct as the pullability is proportionally to the inverse of load capacitance square. I was also thinking of removing the 2 capacitors (that's why I was saying about 6pF crystal, :)), but obviously it will increase the ppm value too.

Udo Klein

OK, got it.

I looked up your schematics. The power path controller and the regulator come in very small packages. How did you solder those?

Udo
Check out my experiments http://blog.blinkenlight.net

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