WATERPROOF-SELF-CT-REF

瑞萨电子电容式传感器 CTSU2 可进行主动屏蔽，无需任何外部组件。 主动屏蔽可有效提高防水性以及提高自电容按钮的抗噪性。

”自电容式防水按钮解决方案“的参考设计将传统 GND 屏蔽的防水性与自电容式按钮的自动屏蔽进行了比较。

自电容防水按钮——电极板

• 基于瑞萨电子电容式触摸按键的解决方案，具有高灵敏度和高抗噪性
• CTSU2 自动屏蔽的使用示例
• 自电容触摸按钮兼具防水和抗噪特性
• 支持 IEC 61000 4-3 3 级辐射电磁噪声抗扰度标准
• 适用于各种产品，例如：需要防水的白色家电、与水相关的产品和户外安装设备等。

Renesas' “Self-Capacitance Waterproof Button Solution” solves problems with conventional technology (GND shield, mutual capacitance buttons). The table below details the type of technologies that can be used and their related issues. These issues are resolved with Renesas' solution. The active shield makes the self-capacitance buttons water resistant for easy design. Additionally, the self-capacitance buttons and active shielding is enable using one chip without any additional parts.