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Resonance-Based Capacitive Sensing Using LDC2114

 

Capacitive sensing can be used to implement proximity detection or touch applications for various smart devices and equipment. In this application note, we review the advantages of Texas Instruments’ resonance-based approach to capacitive sensing, followed by a discussion of the features and configurations of our third generation resonance-based sensing IC, the LDC2114. We also provide some guidelines in sensor design by characterizing the relationship between detection range and sensor size for the LDC2114, using a square copper plate as the sensor . The simplicity and flexibility of the sensor design allows it to be easily incorporated into a wide range of systems that require proximity or touch applications.