2025-06-10 8:48 AM
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?
Solved! Go to Solution.
2025-06-12 3:10 AM
Hi @sparky619 ,
The purpose of 10uF capacitor is to have a tank capacitor close the device. It is also possible to use MLCC capacitor instead of aluminum type.
2025-06-10 8:58 AM
STEVAL-MKI151V1 BoM:
https://www.st.com/en/evaluation-tools/steval-mki151v1.html#cad-resources
2025-06-10 9:55 AM
Thank you!
2025-06-10 9:59 AM
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.
2025-06-12 3:10 AM
Hi @sparky619 ,
The purpose of 10uF capacitor is to have a tank capacitor close the device. It is also possible to use MLCC capacitor instead of aluminum type.
2025-06-12 3:36 AM - edited 2025-06-12 3:37 AM
@Federica Bossi wrote:It is also possible to use MLCC capacitor instead of aluminum type.
So the datasheet should be updated to reflect this:
https://www.st.com/resource/en/datasheet/lis2dh12.pdf#page=20