3D Hall 8 Click is a compact add-on board containing an ultra-small 3D-magnetic sensor for industrial and consumer applications. This board features the TLI493D-W2BW, a low-power 3D Hall sensor from Infineon. This magnetic sensor combines high-accuracy magnetic field measurements with exceptionally low power consumption (minimum 7nA). It features an I2C interface, enabling it to be easily configured by MCU whit the measurement data provided in digital format. It also provides the functionality to Wake-Up a sleeping system. This Click board™ is suitable for a wide range of magnetic sensing, including robotics position sensing, angle measurement at the end of the shaft and out of shaft configurations, and many more.
3D Hall 8 Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.
3D Hall 8 Click as its foundation uses the TLI493D-W2BW, a low-power 3D Hall sensor with an I2C interface and Wake-Up feature from Infineon. It consists of three central functional units; containing the power mode control system, a low-power oscillator, basic biasing, undervoltage detection, and a fast oscillator. Besides, it has also implemented the sensing unit, which contains the HALL biasing, HALL probes with multiplexers and successive tracking ADC, and a temperature sensor. This sensor offers several use cases, including innovative human-machine interfaces in the form of industrial and consumer joysticks and precise position control in robotics.
The power mode control provides the power distribution, which manages the Start-Up behavior in the TLI493D-W2BW, a power-on reset function, and a specialized low-power oscillator, the clock source. The sensing unit measures the magnetic field in the X, Y, and Z direction. Each X-, Y- and Z-Hall probe is connected sequentially to a multiplexer, connected to an analog to digital converter. Optional, the temperature measurement feature, activated in the default state, can be determined after the three Hall channels.
3D Hall 8 Click communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting Fast Mode operation with a clock frequency up to 1MHz. For each of the three magnetic channels (X/Y/Z), the Wake-Up function has an upper and lower comparison threshold. Each component of the applied field is compared to the lower and upper threshold. If one of the results is above or below these thresholds, an interrupt is generated called a Wake-Up function. The Wake-Up mode allows the sensor to continue making magnetic field measurements while the MCU is in the power-down state, which means the microcontroller will only consume power and access the sensor if relevant measurement data is available.
An interrupt pin signals a finished measurement cycle but also can be used for I2C clock stretching. In this case, the INT pin must be connected to the SCL pin, which can be done by populating the jumper labeled JP1.
This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
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