I'm trying to save board space. I know crystals typically have 20-30 pF ratings, and need 20-ish pF caps to ground.
It's extra-small (2.5x3.2 mm), has an ESR of 200 ohms (which seems high - is that going to be a problem?) and a load capacitance of 8 pF.
I know that in general, you need caps to ground. But I have also read that there's typically 5-10 pF of parasitic capacitance which should be subtracted from the caps you add. So - does an 8 pF crystal need caps at all?
This is for a real product, so I don't want to cut corners if it will hurt reliability.
EDIT: I found two other people asking the same question; I read the answers they got; I still don't know whether it's correct to leave off the caps. How do I deal with different XTAL pin capacitance when selecting XTAL and load capacitors and How do I choose the correct capacitors to use with my Crystal?
One of the answers said it would be "easier" to design with a crystal with more capacitance, but didn't say why; other answers say that getting within a factor of 2 is probably sufficient. From this, I deduce that the more capacitance the crystal needs, the less you will be messed up by mis-estimating the stray capacitance. So I should pick a crystal that needs 30 pF, put 25 pF on each leg, and I'll probably be good.