Compass 7 Click as its foundation uses the MMC5633NJL, a monolithic high-performance 3-axis AMR magnetic sensor from MEMSIC. It comes with an integrated drive circuit, signal processing circuit, and serial interface block, allowing low noise and high resolution. It can measure magnetic fields within the full-scale range of ±30 Gauss (G) with up to 0.0625mG per LSB resolution at 20bits operation mode and 2mG total RMS noise level, enabling heading accuracy of ±1º in electronic compass applications.
An integrated SET/RESET function eliminates errors due to Null Field output change with temperature. In addition, it clears the sensors of any residual magnetic polarization resulting from exposure to strong external magnets. The SET/RESET function can be performed periodically for each measurement as the specific application requires.
Compass 7 Click communicates with MCU using the standard I2C 2-Wire interface with a maximum clock frequency of 400kHz, fully adjustable through software registers. The MMC5633NJL does not require a specific Power-Up sequence but requires a voltage of 1.8V for its interface and logic part to work correctly. Therefore, a small regulating LDO is used, the MAX8511, providing a 1.8V out of mikroBUS™ power rails. Since the sensor for operation requires a power supply of 1.8V, this Click board™ also features the PCA9306 voltage-level translator allowing the MMC5633NJL to work with 3.3V and 5V MCU properly.
This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
Applications: Can be used as an electronic compass but also can be used in various position sensing applications
Specifications and Features:
- Type Compass, Magnetic
- Interface: I2C
- Compatibility: mikroBUS
- Click board size: 28.6 x 25.4 mm
- Input Voltage 3.3V or 5V
- On-board modules: MMC5633NJL – monolithic high-performance 3-axis AMR magnetic sensor from MEMSIC
- Low power consumption,
- Superior dynamic range and accuracy,
- On-chip automatic degaussing with built-in SET/RESET function,
- Sensitivity compensation and on-chip temperature sensor
1 x Mikroe COMPASS 7 CLICK