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Grove - IMU 9DOF (ICM20600+AK09918) (101020585)
Description
The Grove - IMU 9DOF (lcm20600+AK09918) is a 9 Degrees of Freedom IMU (Inertial measurement unit) which combines gyroscope, accelerometer and electronic compass. We use two chips LCM20600+AK09918 to implement those 3 functions.
The LCM20600 is a 6-axis MotionTracking device that combines a 3-axis gyroscope, 3-axis accelerometer. Gyroscope is a device used for measuring or maintaining orientation and angular velocity, normally, we use it to measure spin and twist. Accelerometer is a device that measures proper acceleration.
The AK09918 is a 3-axis electronic compass IC with high sensitive Hall sensor technology. We use an electronic compass to measure the magnetic force, which can provide us with the direction information.
As its name suggests just use this single small module and you can measure 9 Degrees of Freedom: angular rotation in x/y/z axis, acceleration in x/y/z axis, and magnetic force in x/y/z axis.
What an amazing module! Just use this module to build your own motion and orientation system
Features
- 3-Axis Gyroscope with Programmable FSR of ±250 dps, ±500 dps, ±1000 dps, and ±2000 dps
- 3-Axis Accelerometer with Programmable FSR of ±2g, ±4g, ±8g, and ±16g
- 3-Axis Electronic Compass with 0.15 μT/LSB (typ.) sensitivity
- User-programmable interrupts
- 16-bit ADC resolution and Programmable Filters for acceleration measurements
- 16-bit ADC resolution for magnetic measurements
- 1 KB FIFO buffer enables the applications processor to read the data in bursts(LCM20600)
- Embedded temperature sensor
- Magnetic sensor overflow monitor function
- Built-in oscillator for internal clock source
Typical Applications
- Smartphones and Tablets
- Wearable Sensors
Pin Out
Schemaitc
Power
Since the operating voltage range of LCM20600 is 1.71V to 3.45V, and the operating voltage range of AK09918 is 1.65V to 1.95V, we use a power conversion chip XC6206P182MR to provide a stable 1.8V for both chips.
Bi-directional level shifter circuit
This is a typical Bi-directional level shifter circuit to connect two different voltage section of an I2C bus. The I2C bus of two chips use 1.8V, if the I2C bus of the Arduino use 5V or 3.3V, this circuit will be needed. In the schematic above, Q1 and Q2 are N-Channel MOSFET CJ2102, which act as a bidirectional switch. In order to better understand this part, you can refer to the AN10441
Technical Details | Dimensions | 40mm x 20mm x 10mm |
| Weight | G.W 9g N.W 3g |
| Battery | Exclude |
| Operating Voltage | 3.3V / 5V |
| Operating Temperature | -30°C to +85°C |
| Gyroscope Full-Scale Range | ±250 dps, ±500 dps, ±1000 dps, ±2000 dps |
| Gyroscope Sensitivity Scale Factor | 131 LSB/(dps)@±250dps; 65.5 LSB/(dps)@±500dps; 32.8 LSB/(dps)@±1000dps; 16.4 LSB/(dps)@±2000dps |
| Accelerometer Full-Scale Range | ±2g, ±4g, ±8g, ±16g |
| Accelerometer Sensitivity Scale Factor | 16384 LSB/g@±2g; 8192 LSB/g@±4g; 4096 LSB/g@±8g; 2048 LSB/g@±16g |
| Magnetic sensor measurement range | ±4912μT (typical) |
| Magnetic sensor sensitivity | 0.15μT (typical) |
| Interface | I2C |
Part List
| Grove - IMU 9DOF (lcm20600+AK09918) | 1 |
| Grove Cable | 1 |
ECCN/HTS
| ECCN | 7A994 |
| HSCODE | 9031900090 |
