MLX92231LSE-AAA-017-RE

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Introduction

The MLX92231LSE-AAA-017-RE is part of the family of 2-in-1 magnetic sensors with a TMR (Tunnel Magnetoresistance) based differential amplifier suitable for sensing small magnetic field changes in the range of mT (millitesla) up to gauss. This type of sensor is designed for use in a variety of applications, such as position sensing, contactless on/off switches, and detection of movement and direction.

Application Field

The multiple electrical configurations of the MLX92231LSE-AAA-017-RE enable it to react to magnetic fields from multiple orientations. A wide range of sensing thresholds and detection levels can be adjusted for different type of applications. This makes the MLX92231LSE-AAA-017-RE ideal in both closed and open loop systems.

The device is typically used in automotive, industrial, medical and home appliance control. It is a great choice for applications such as door/lid/window/valve/drawer open/ close detection, proximity switch, simple remote control, fire alarm system, security system, and non-contact valve control.

Working Principle

The principle of operation is based on Tunnel Magneto Resistance (TMR) technology. TMR is a sensing technology based on the magnetoresistive properties of certain materials. When a magnetic field is applied, the electrons of the material are forced into orbits around the atoms, and their collective movement causes a change in resistance.

The MLX92231LSE-AAA-017-RE contains two TMR-based differential Hall cells. These cells connect to an integrated Differential Amplifier. The differential amplifier converts the resistance to a voltage, which is further amplified and then compared to a threshold voltage. When the magnetic threshold voltage is surpassed, the output of the amplifier will switch, in this case, from ‘low’ to ‘high’. By measuring the output of the device, the strength of the magnetic field can be determined.

Conclusion

The MLX92231LSE-AAA-017-RE is a 2-in-1 magnetic sensor, suitable for sensing small magnetic field changes in the range of mT (millitesla) up to gauss. Multiple electric configurations allow it to be used in a variety of applications, such as automotive, industrial, medical and home appliances. The principle of operation is based on the magnetoresistive properties of certain materials and a TMR-based differential amplifier. By measuring the output of the device, the strength of the magnetic field can be determined.

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