Saturday, 8 June 2013

16MHz Crystal with 2p load capacity: What load capacitors are necessary

16MHz Crystal with 2p load capacity: What load capacitors are necessary

I found an nice and cheap crystal on AliExpress which I want to use with my ATMEGA328 microcontroller.
Its load capacity are only 2pF. Normally I would say, that the 2 capacitors from the crystal to ground with 4pF should work fine. But isn't the parasitic capacity of the soldered part that high, that maybe no additional capacitors are needed?

Is exactly this the idea of a crystal with 2pF load capacity, that no additional capacitors are needed?
I am not having a oscilloscope, because of that, it is difficult for me to test when it is oscillating.
Thank you in advance
Felix

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