Electronics > Projects, Designs, and Technical Stuff
2.2uF C0G/NP0
fabiodl:
I am developing a board around the TI pcm5122.
The datasheet at page 66 reports that all caps should be 2.2uF C0G.
I cannot find any caps with that dielectric/temperature coefficient on Digikey with capacitance over 560nF.
Do bigger C0G caps exist? What/Where should I search for?
langwadt:
use 4?
DaJMasta:
I'd be sort of surprised if they do, I'm actually surprised you can find a 500nF C0G, the ones I'm used to seeing top out in the single digits.
Why not a film cap instead?
Jay_Diddy_B:
Hi,
I think is a an error the correct value is 2.2nF
They use 2.2nF in other places in the documentation.
2.2nF and 470 \$\Omega\$ is 153kHz
2.2uF and 470 \$\Omega\$ is 153 Hz low pass filter.
Jay_Diddy_B
duak:
Wow, I'm surprised there are even 560 nF parts. I think it's a mistake. The output filter should be 2.2 nF C0G as per the schematic, while the 2.2 uF for the charge pump can be an X7R.
Here's a link to someone who thinks the same: https://electronics.stackexchange.com/questions/386216/pcm512x-charge-capacitor-value
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