A1203EUA-T

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Magnetic Sensors, more commonly known as switches, are devices used to detect the presence of a magnetic field or the presence of a magnetically charged material or object. The A1203EUA-T, manufactured by Allegro Microsystems, is a three-terminal hall-effect integrated force sensor switch designed to detect moving ferrous metal objects. It features low-power consumption, an open-drain output, and a threshold range of 0.7V to 4.5V, making it suitable for use in industrial or automotive applications.

A1203EUA-T Application Field

The compact A1203EUA-T is suitable for a wide range of applications, including door and window switches, touchless switches, proximity sensing, automatic shutoff, and contactless, speed, and position sensing. It offers excellent sensitivity over a wide temperature range and is RoHS compliant, making it a good choice for automotive and industrial applications.

The device operates at supply voltages from 1.8V to 8V, making it ideal for battery-powered systems. It is designed to handle a variety of switching loads, making it an ideal solution for applications such as door chimes, relays, and vibration detection.

A1203EUA-T Working Principle

The A1203EUA-T is based on Hall effect technology, which uses a combination of electric and magnetic fields to read the magnetic field of a ferrous target. When a ferrous target is brought into close proximity to the device, a switching action is triggered. The threshold voltage needs to be above the minimum threshold required for the device to detect the target. The device is designed with hysteresis, which eliminates chatter during operation.

The device is designed to be easily interfaced with commonly used components, such as combinational logic devices, open collector transistors, and CMOS logic switches. The device has a low-power sleep mode that allows the device to be powered down during periods of inactivity, and a low-power active mode for continuous monitoring.

The A1203EUA-T also features an on-board temperature sensor that continuously monitors the temperature inside the device and shuts it down in case of overheating, ensuring a reliable operation over a wide temperature range. This makes the A1203EUA-T ideal for applications where the device needs to be able to operate in extreme temperatures.

Conclusion

The Allegro Microsystems A1203EUA-T is a three-terminal hall-effect force sensor switch designed to detect moving ferrous metal targets. It features low-power consumption, an open-drain output, and a threshold range of 0.7V to 4.5V, making it suitable for a wide range of applications. The device has an on-board temperature sensor that ensures reliable operation over a wide temperature range and offers excellent sensitivity over a wide range of temperatures.

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