The Grove - IMU 9DOF (lcm20600+AK09918) is a 9 Degrees of Freedom IMU (Inertial measurement unit) that combines a gyroscope, accelerometer, and an electronic compass. We use two chips LCM20600+AK09918 to implement those 3 functions.

The LCM20600 is a 6-axis motion tracking device that combines a 3-axis gyroscope, and a 3-axis accelerometer. A gyroscope is a device used for measuring or maintaining orientation and angular velocity, normally, we use it to measure spin and twist. An accelerometer is a device that measures proper acceleration.

The AK09918 is a 3-axis electronic compass IC with highly sensitive Hall sensor technology. We use an electronic compass to measure the magnetic force, which can provide us with direction information.

As its name suggests just use this single small module and you can measure 9 Degrees of Freedom: angular rotation in the x/y/z axis, acceleration in the x/y/z axis, and magnetic force in the x/y/z axis.

What an amazing module! Just use this module to build your own motion and orientation system

Highlighted 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
  
  

Applications

• Smartphones and Tablets

• Wearable Sensors
  
  

Hardware Overview

Figure 1: Communication Inputs

Figure 2: Development Board Schematics 

Documentation