MLX90242ESE-GDA-000-SP

Magnetic Sensors - Linear, Compass (ICs)

MLX90242ESE-GDA-000-SP Application Field and Working Principle

The MLX90242ESE-GDA-000-SP is a magnetic sensor based on a Microelectromechanical Systems (MEMS) technology integrating an analogic magnetoresistive (MR) dual sensor with a linear analogic output and a digital Two-Wire Interface (TWI) interface. The device operates over a supply voltage of 1.9V to 3.6V. It provides accurate digital compensation for sensor-specific offsets, gains, linearization, temperature drift, and basic diagnostics. The MLX90242ESE-GDA-000-SP is able to measure both the magnitude and the orientation in two spatial axes of magnetic field vectors.

Application Field

The MLX90242ESE-GDA-000-SP can be used in a variety of applications. It is suitable for measuring the permanent orientation of devices or environments, such as those used in navigation, induction heating, and motion control systems. The device can be used to determine the position of compasses, hall-effect switches, and robotics. The device also has excellent performance in measuring the strength and direction of the magnetic field generated by electrical motors or other magnets.

Working Principle

The MLX90242ESE-GDA-000-SP consists of two MR sensors and an on-chip signal conditioning circuit, with an analog output on the X-axis for magnitude measurement and a digital output on the Y-axis for orientation measurement. The MR sensors have a three-terminal structure with two sense terminals and one bias terminal. When the bias current passes through the MR sensor, it produces a weak magnetic field, inducing an opposing current. By measuring this current, the device senses the direction and magnitude of the ambient magnetic field.

The two MR sensors produce an output differential voltage on the X-axis, which is proportional to the magnetic field strength. The signal conditioning circuit amplifies the differential signal and then converts it to a single-ended signal. This signal is further amplified by a programmable gain amplifier and then converted to a linear analog output voltage (LINER). On the Y-axis, the output differential voltage is converted to a digital signal by a comparator circuit. The digital output voltage (RORG) is determined by the direction of the ambient magnetic field.

Conclusion

The MLX90242ESE-GDA-000-SP is a perfect choice for applications that require precise and accurate measurements in regards to orientation and strength of a magnetic field vector. The Microelectromechanical Systems (MEMS) technology ensures that the device provides excellent performance in a wide range of magnetic field vectors. Furthermore, the on-chip digital compensation circuit provides excellent pitch, roll, and temperature drift compensation for improved accuracy.