Hello everyone!

 

Here is some information on how to design CapSense sensors while developing Capacitive sensing applications in MBR 3xxx.

 

Schematic design:

After selecting MBR3 device, while designing schematic you can refer to the following documents:

 

1) MBR3 datasheet (http://www.cypress.com/file/46236/download )

2) CapSense schematic design section in AN90071 - MBR3xxx CapSense Design Guide (http://www.cypress.com/file/46366/download)

 

Layout design:

While designing PCB, refer to the following documents:

 

1) While designing any CapSense sensor, you can refer to MBR3 design Toolbox (http://www.cypress.com/file/46361/download) to decide on the sensor dimensions.

2) CapSense layout guidelines section in AN90071 - MBR3xxx CapSense Design Guide (http://www.cypress.com/file/46366/download)

3) Design considerations section in AN64846 - Getting Started with CapSense (http://www.cypress.com/file/41076/download)

 

Following the above mentioned guidelines in various documents will help achieve high SNR, better performance and electromagnetic compatibility.

 

Feel free to leave comments and ask questions, we appreciate the feedback!