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LIS2DH12 bypass capacitor

sparky619
Associate

Hi, I'm putting down a LIS2DH12 accelerometer on a new PCB. The datasheet calls for an aluminum capacitor on VDD, but the eval board (STEVAL-MKI151V1) shows a small capacitor that looks like a ceramic. I don't know for sure because I can't find the BOM for the eval board. I really don't have clearance for an electrolytic capacitor. How critical is it?

3 REPLIES 3
Andrew Neil
Super User

STEVAL-MKI151V1 BoM:

https://www.st.com/en/evaluation-tools/steval-mki151v1.html#cad-resources

 

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

Thank you!

sparky619
Associate

BOM lists that capacitor as a generic polarized.. but the silkscreen is not marked with polarity and the gerbers do not show the right size for a polarized capacitor. Still wondering why a polarized capacitor is called out in the datasheet for the sensor.