How can i calculate decoupling capacitor value? Which amount of noise we can filter use it.why use here 10uf , 0.1uf capacitor?
Electronic – how can i calculate decoupling capacitor value
decoupling-capacitor
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Best Answer
It's not for amount of noise. It's to supply current (the big one) and to react quickly (the small ones). So to size the big- consider current. Analog circuits, like sensors and stuff, would want 1uF and more. Digital- depends, but normally you put 0.1uF on each VCC input. For really fast stuff it would also be 1nF for low ESL.
In most cases you will not feel a difference. When you will, it will take long hours to understand why the hell your circuit behaves weird way.