MSP430FR2633: Regarding design guidelines when the area around the pad is metal

Sh.Sasaki

Hi,

My customer is considering a CapTIvate touchpad.
The customer's application is metal around the touchpad as shown below.

Is there any information about design guidelines when the area around the pad is metal?

Best regards,
Sasaki

over 4 years ago

+1 Dennis Lehman over 4 years ago

TI__Guru 71216 points

Hello Sasaki-san,

1mm is recommended spacing between the sensor electrodes and any surrounding ground. For this design the metal surface must be grounded to prevent the metal from electrically floating and causing coupling to the the touchpad sensor.

0 Sh.Sasaki over 4 years ago in reply to Dennis Lehman

Guru 13625 points

Hi Dennis-san,

Thank you for the iformation.

I understand it.

Best regards,
Sasaki

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MSP430FR2633: Regarding design guidelines when the area around the pad is metal