6DOF IMU 5 Click features 7-Axis ICM-20789 chip from TDK, an integrated 6-axis inertial device that combines a 3-axis gyroscope, 3-axis accelerometer, and an ultra-low noise MEMS capacitive pressure sensor. This unique 7-Axis device offers great performance with an accuracy of ±1 Pa, an accuracy enabling altitude measurement differentials as small as 8.5 cm. The pressure sensor’s MEMS capacitive architecture provides the industry’s lowest noise at the lowest power, high sensor throughput, and temperature coefficient offset of ±0.5 Pa/°C. The combination of high accuracy elevation measurements, low power, and temperature stability makes it ideal for a wide range of motion tracking applications.
6DOF IMU 5 Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.
6DOF IMU 5 Click uses the ICM-20789, a 6-axis inertial sensor (3-axis gyroscope and a 3-axis accelerometer) along with ultra-low noise MEMS capacitive barometric pressure sensor in a 4 mm x 4 mm x 1.365 mm (24-pin LGA) package. ICM-20789 features a 4 KB FIFO that can lower the traffic on the serial bus interface. The digital output barometric pressure sensor is based on an ultra-low noise innovative MEMS capacitive technology that can measure pressure differences with an accuracy of ±1 Pa, an accuracy enabling altitude measurement differentials as small as 8.5 cm without the penalty of increased power consumption or reduced sensor throughput. The capacitive pressure sensor has a ±1 hPa absolute accuracy over its full range of 300 hPa -1100 hPa. The pressure sensor offers industry leading temperature stability of the pressure sensor with a temperature coefficient offset of ±0.5 Pa/°C, embedded temperature sensor and 400 kHz I2C bus for communication. The gyroscope has a programmable full-scale range of ±250 dps, ±500 dps, ±1000 dps, and ±2000 dps. The accelerometer has a user-programmable full-scale range of ±2g, ±4g, ±8g, and ±16g. Factory-calibrated initial sensitivity of both sensors reduces production-line calibration requirements. Other features include on-chip 16-bit ADCs, programmable digital filters, another embedded temperature sensor, and programmable interrupts. The device features I2C serial interface to access its registers at 400 kHz as well as at 8 MHz SPI.
The onboard chip ICM-20789 requires stable voltage for power supply of input/output pins (VDDIO) at 1.8V which also supplies the pressure sensor. 6DOF IMU 5 Click does all of the power supply regulations as well as the logic level translations needed for proper operation. The MCP1826, a 1000 mA Low Dropout (LDO) linear regulator provides high-current and low-output voltage of 1.8V to all of the essential parts of the board, while TXB0106 and PCA9306 do the SPI and I2C signal level translations, respectively, between the MCU and the ICM-20789. Interacting with the 6-axis is possible through SPI communication protocol while the I2C bus allows access to pressure sensors 16-bit address space registers.
This device is intended for implementation in Drones and Flying Toys, Motion-based gaming controllers, Virtual Reality Headsets & Controllers, Indoor/Outdoor Navigation (dead-reckoning, floor/elevation/step detection).
This Click board™ uses both I2C and SPI communication interfaces. It is designed to be operated only with 3.3V logic levels. A proper logic voltage level conversion should be performed before the Click board™ is used with MCUs with logic levels of 5V.
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