A3281ELTTR-T

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Magnetic Sensors - Switches (Solid State) provide a non-contact, reliable and highly repeatable switching solution that allows measuring and controlling the level of magnetic fields in a given range. These sensors detect changes in magnetic fields, making it possible to monitor and measure potential field changes in a system. The A3281ELTTR-T is one such device, and this article will discuss its application area and working principle.

The A3281ELTTR-T is a latching solid state Hall-effect switch with 3.1 mA hysteresis at room temperature. It is suitable for automotive, consumer, and industrial applications where an accurate, reliable, and low-power solution is required. Its sensitive element is a Hall-effect structure consisting of two magnetically biased Hall elements, which when exposed to a magnetic field, activate a switch. It offers a choice of two actuating poles, either housed in a LM05 automotive grade package or encapsulated in a SOT143 package.

The A3281ELTTR-T is designed for use in applications such as motor speed detection, position sensing, over-temperature protection, motor control, HVAC, and level sensing. It operates on a supply voltage of +1.5V to +36V and has a low power consumption of 6.6 mW at +24V supply voltage. The high-frequency switching capability of the device, up to 3 kHz, provides the accuracy and precision required for most demanding applications. The device also features excellent temperature stability, providing a temperature range of -40°C to +125°C.

The working principle of A3281ELTTR-T is based on the Hall-Effect phenomenon. When a small magnetic field is applied to the device, it senses and processes the input to activate a switch. The device has two Hall elements and two outputs. When the input is low, the Hall elements provide an output that keeps the outputs off and when the input rises above the threshold value, the Hall elements produce an output that activates the switch and turns on the outputs.

The A3281ELTTR-T is a versatile device and can be used in a variety of applications. Its small and robust design allows for easy installation and provides reliable operation even in harsh and difficult environments. In motor speed detection applications, for example, the device accurately measures the frequency of the magnetic field in order to determine the speed of the motor. In level sensing, its high sensitivity and repeatability makes it ideal for monitoring liquid or solid levels in tanks and other vessels. Finally, its linear temperature characteristic provides excellent temperature stability and makes it suitable for cooling and heating systems.

In conclusion, the A3281ELTTR-T is a solid state Hall-effect switch that offers a reliable and repeatable switching solution for a variety of applications. Its small size and low power consumption make it well suited for a wide range of applications from motor speed detection to level sensing. With its high-frequency switching capability, excellent temperature stability, and low power consumption, the A3281ELTTR-T is the ideal device for accurately measuring and controlling the level of magnetic fields in a given range.

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