HMR3400

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Magnetic sensors are widely used in various industries due to their excellent accuracy and stability. Among these sensors, the HMR3400 series magnetoresistive sensors are the most common and popular ones. These sensors are capable of detecting extremely tiny magnetic fields and changes in their configurations.

HMR3400 series magnetoresistive sensors include three main components – an AFE (Analog Front-End), a MEMS (Microelectromechanical Systems) and an ASIC (Application Specific Integrated Circuit). The AFE comprises a differential amplifier; this amplifier receives two magnetically sensitive resistors (MSRs) and amplifies their signals. The MEMS consists of a pair of tiny cantilevered arms which limit the displacement of the two MSRs. Last but not least, an ASIC is embedded into the MEMS to enable the sensor to accurately detect tiny changes in the magnetic field. The ASIC performs complex calculations such as Digital Signal Processing (DSP) to enable the device to accurately detect magnetism.

The primary application of the HMR3400 magnetoresistive sensor is for Compass and Magnetic Field (Modules). Many devices such as digital compasses, magnetometers, navigation system, and robotic applications utilize the HMR3400 magnetoresistive sensor for their operations. The HMR3400 series also features excellent high-resolution measurement accuracy, which makes it ideal for advanced navigation systems. Furthermore, it is also used in the automotive industry for navigation, as well as in industrial processes such as tilt sensing, magnetic flux detection, position tracking, and flow metering.

Moreover, the HMR3400 series sensor-based modules can also be used to measure physical parameters such as temperature, pressure, displacement, and humidity. This is due to the fact that these sensors are sensitive to changes in the ambient environment. By integrating temperature and pressure sensors, these modules can also be used to measure the physical parameters within an area.

The working principle of the HMR3400 magnetoresistive sensor is based on the Hall effect. The Hall Effect is a physical phenomenon in which a current-carrying wire or conductor placed perpendicular to an external magnetic field creates a potential difference at its ends. This potential difference is then used to measure the strength of the magnetic field which is then used to determine the direction of the magnetic field. The HMR3400 magnetoresistive sensor uses this principle to detect and measure changes in the external magnetic field. This data is then processed and used by the device to perform navigation and other functions.

The HMR3400 series magnetoresistive sensors are highly reliable and have excellent accuracy and high resolution. Furthermore, these sensors are also affordable and easy to implement in various applications. As a result, they are widely used in Compass and Magnetic Field (Modules) applications for navigation and automatic control, as well as in various industries such as automotive, medical, and industrial processes.

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