Regarding application note to prevent CapSense’s malfunctions when noise is injected to GND line.

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
YuMa_1534086
Level 7
Level 7
Distributor - Macnica (Japan)
500 replies posted 250 sign-ins 10 likes received

Hello Cypress.

Is there any application to prevent CapSense’s malfunctions when noise is injected to GND line?

Best Regards.

Yutaka Matsubara

0 Likes
1 Solution
Anonymous
Not applicable

The capsense uses the noise on the ground and power rails to filter noise out of the capacitive sensing from what I've read, so this might be an intended feature/function that is not working well with too much GND noise?

You could try using a capacitor from VDD to GND or at other wire/pin locations to try to filter out the noise from reaching the IC.

View solution in original post

0 Likes
1 Reply
Anonymous
Not applicable

The capsense uses the noise on the ground and power rails to filter noise out of the capacitive sensing from what I've read, so this might be an intended feature/function that is not working well with too much GND noise?

You could try using a capacitor from VDD to GND or at other wire/pin locations to try to filter out the noise from reaching the IC.

0 Likes