AN92239 - Proximity Sensing with CapSense®

개요

A proximity sensor detects the presence of a nearby object without any physical contact. Cypress’s CapSense devices support self-capacitance based proximity sensing and can achieve up to a 30-cm proximity-sensing distance. This application note explains how to:

• Design a proximity sensor and tune the CSD parameters to achieve large proximity-sensing distances
• Tune the CSD parameters for a proximity sensor to achieve liquid tolerance
• Implement proximity-based gesture detection
• Implement the wake-on-approach feature to reduce the power consumption of the device