A3280ELTTR

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The A3280ELTTR is a magnetic sensor-switch manufactured by Allegro Microsystems, Inc., a global leader in development and supply of linear and magnetic hall-effect integrated circuit (IC)s. The device is ideal for applications requiring position sensing, tailored for social distance compliance and facial recognition systems, as well as consumer, automotive, medical, and industrial applications. This article examines the A3280ELTTR device’s application field and working principle.

Application Field

The A3280ELTTR is a magnetic sensor-switch that integrates a Hall-effect digital Position Sensor (POS)-switch with high-temperature tolerant (HIT-LT) bipolar ICs with a built-in temperature sensor. It operates over a wide temperature range of -40°C to 150°C and features low power consumption, low EMI characteristics, fast propagation delay, programmable power-on and power-off voltage thresholds, and a quiescent current of only 23μA. It can sense the presence of a magnet whose strength is between 2mT and 4.2mT from a distance of up to 8mm. This makes the device suitable for applications requiring position sensing, including face recognition systems, social distance compliance sensing, as well as medical, consumer, automotive, and industrial applications.

More specifically, the A3280ELTTR is perfectly suited for facial recognition systems due to its high temperature tolerant circuit and ultra-low power consumption, and its fast propagation delay of 8.3μs or less. Its small and thin package (1.9×1.3×0.8mm) makes the device ideal for applications with limited space. It is also widely used in consumer, automotive, medical, and industrial applications due to its high accuracy, low power consumption, and wide temperature range.

Working Principle

The A3280ELTTR is a Hall-effect magnetic sensor-switch that employs a built-in Hall element and integrated circuits (ICs) in order to generate a control signal in the presence of a magnetic field. When a magnetic field is applied to the device, the ICs translate the magnetic field intensities into output voltage signals. In addition, the device can detect the direction of the magnetic field, allowing it to detect the presence of a magnet. The device is also equipped with a temperature sensor, enabling it to shut off power in the event of an over-temperature situation.

The A3280ELTTR is designed to save power with its main feature of operating on low voltage and only consuming 7uA of standby current. This extends its battery life and helps reduce the overall power consumption of any application it is used in. The device also uses its built-in temperature sensor to shut down the device in the event of an over-temperature situation. This prevents any damage to the device due to excessive heat.

In conclusion, the A3280ELTTR is a magnetic sensor-switch manufactured by Allegro Microsystems, Inc. It is a perfect solution for applications requiring precise position sensing and is suitable for a wide range of applications, including medical, consumer, automotive, and industrial applications. With its high accuracy, low power consumption, and wide temperature range, the A3280ELTTR is an ideal choice for applications requiring position sensing.

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