TMR、固态和磁性传感器的3到2线转换电路
5 月 1, 2021
在接近感应功能中，通常存在双线接口。任何带有门或盖的应用，接近感应功能都会向系统指示门或盖是打开还是关闭的。在许多传统设计中，接近感应功能是通过簧片开关和磁铁或机电开关实现的，当车门或盖关闭时，机电开关会按下。
近年来，固态磁传感器，如Coto的RedRock® TMR磁性传感器已成为一种有吸引力的替代方案。RedRock®TMR磁性传感器具有极低的功耗、极小的封装尺寸和极高的可靠性；与簧片开关和机械开关相比，它们也具有成本竞争力。尽管TMR磁性传感器具有理想的功能和优点，但设计师通常希望保留双线接口，因为它更便宜，或者因为他们不想（或没有自由）将系统接口从双线改为三线。
这应用说明解释了如何在不牺牲双线接口的情况下实现固态磁传感器（如极低功率RedRock®TMR磁性传感器）的优点，该传感器由信号、接地和电源连接组成。
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