The LDA505 (instead of the TCA505) is an application-specific integrated circuit with short-circuitprotection developed for inductive proximity switching applications. It can be used in a wide range of Proximity sensors or proximity control systems, as well as in a variety of inductive instrumentation.Induction tachometer, etc. The LDA505 consists of an oscillator, a switching circuit, and an amplifying output circuit. The basic working principle is to use an external inductor and capacitor to form an LC high-frequency resonant circuit and generate an alternating magnetic field in the resonant loop. When
the detected metal target approaches the magnetic field and reaches the sensing distance, an eddy current is generated in the detected metal target and the energy of the oscillator is taken up, so that the amplitude of the oscillator is attenuated or stopped. The oscillation and oscillation of the oscillator are processed by the post-amplifier circuit and converted into a switching signal to trigger the drive control
device, thereby achieving the purpose of non-contact detection. LDA505 has the characteristics of high integration, wide working voltage, large output current, adjustable control distance, few peripheral circuits, convenient application and stable and reliable operation. Compared with the inductive proximity switch scheme composed of general discrete components, the LDA505 integrated chip solution has better consistency and stability, so it is especially suitable for high reliability and high reliability.