A3280LLHLT-T Sensors, Transducers

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The A3280LLHLT-T is a magnetic sensor from Allegro MicroSystems which falls into the Magnetic Sensors - Switches (Solid State) category. This sensor can be used for automotive, power supply, and appliance applications. Available in a lead-free, 8-pin SOIC package, it is an AEC-Q100 qualified device.

A3280LLHLT-T has a pullback structure which permits the switch to be operated with a wide range of magnetic materials eliminating the need for manual adjustment. It operates over a wide temperature range of -40°C to +125°C with a supply current of less than 3mA. The output voltage is preconditioned by an op-amp stage designed to reduce the possibility of false triggering.

The application field of A3280LLHLT-T includes providing a portable electrical current for various auto-loading and power supply applications. This is possible due to the device’s pullback feature, which can be used to maintain a preset current even with varying magnetic fields. The device can also be used to control the temperature of appliances, as the pullback structure can detect a sudden change in temperature and shut off power automatically.

The A3280LLHLT-T sensor utilizes two main components for its operation: a Hall effect sensing element and an analog/digital control circuitry. The Hall effect sensing element is used to detect changes in the ambient magnetic field and produces an electrical output that is proportional to that field strength. This output is then sent to the control circuitry which compares the changing signal against a reference voltage. If the signal exceeds the reference voltage, the device will switch off and perform its predetermined functions. The reference voltage can also be set to make the device more sensitive to specific types of magnetic materials.

The A3280LLHLT-T also has several built-in safety measures designed to reduce the risk of damage from the environment. These measures include reverse polarity protection, ESD protection, surge protection, and over-temperature protection. This ensures that the device is able to handle various extreme conditions and still perform its intended functions reliably.

In conclusion, the A3280LLHLT-T is an effective magnetic sensor which can be used for a variety of automotive, power supply, and appliance applications. Its pullback feature permits operation with a wide range of magnetic materials, and its voltage preconditioner ensures that false triggering is minimized. Additionally, the device includes several built-in safety measures that protect it from environmental hazards.

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