SM-ICM45686-AK09940A / Low-noise 9-axis IMU Motion Sensor Module

Description

 

The SM-ICM45686-AK09940A is a compact module featuring the TDK ICM-45686 6-axis inertial measurement unit (IMU) and the 3-axis Asahi Kasei Microdevices (AKM) AK09940A electronic magnetometer, designed for precise motion tracking and magnetic field sensing in space-constrained applications.

• TDK ICM-45686 is an IMU delivering 3-axis gyroscope and 3-axis accelerometer with low-noise signal range up to ±4000 degrees/sec and ±32g, respectively. This IMU can tolerate up to 20,000g of shock.

• AKM AK09940A is a geomagnetic sensor delivering precise 3-axismagnetic field measurement with magnetic field range up to ±1200µT andsensitivity of 10 nT/LSB

 

Datasheet

NOTE: For SlimeVR nRF firmware https://github.com/SlimeVR/SlimeVR-Tracker-nRF, makesure to dsiable IMU external clock for more reliable results.  

 

Features

TDK ICM-45686 IMU

• 3-axis gyroscope
  • Gyroscope range: ±15.625 to ±4000 degrees/sec
  • Sensitivity scale factor: 8.2 to 2097.2 LSB
  • Low noise: 3.8 mdps/√????????
  • Shock tolerance: 20,000g
• 3-axis accelerometer
  • Accelerometer range: ±2g to ±32 g
  • Sensitivity scale factor: 1024 to 16,384
  • Low accelerometer noise: 70 µg/√????????
• Configurable serial interface
  • I2C @ 125 KHz, 400 KHz, 1 MHz, or
  • SPI up to 24 MHz
• Low noise and low power modes support
• Output data rate
  • Low noise mode: 12.5 Hz to 6400 Hz
  • Low power mode: 1.5625 Hz to 400 Hz
• 2 programmable interrupt pins with 5 configurable interrupt events
• Wake-on-motion for low power operation of host controller
• Dual interface (UI + AUX) allowing host controller to communicate with another I2C/SPI device via the ICM-45686’s main serial interface
• Digital output temperature sensor
• Self-test

AKM AK09940A Magnetometer

• 3-axis magnetometer
• 18-bit data out for each 3-axis magnetic component
  • Range ±1200 ????T (max)
  • Sensitivity 10 nT/LSB (max)
• Serial interface
  • I2C @ 125 KHz (standard mode), 400 KHz (fast mode)
  • SPI up to 24 MHz (not available on SM-ICM45686-AK09940A sensor module)
• 1 programmable interrupt pin for data-ready (DRDY) signaling
• Selectable sensor drive mode
  • low power drive
  • low noise drive
  • ultra-low power drive

Specification

• Module name: SM-ICM45686-AK09940A
• Main components:
  • TDK ICM-45686 6-axis IMU
  • AKM AK09940A 3-axis electronic magnetometer
• Operating supply voltage
  • System power supply voltage (VCC): 1.8V to 3.6V
  • Digital I/O interface supply voltage (VDDIO): 1.8V to 3.6V
• Operating temperatures: -30 0C to +85 0C
• Dimensions: 16.0 x 18.0 (unit: mm)

Application

The SM-ICM45686-AK09940A motion tracking sensor module can be used in a wide range of applications:

• IoT devices
• Wearable devices
• Gaming devices
• Virtual reality (VR)/ augmented reality (AR) controllers
• Tracking applications, e.g., gesture recognition, pedometer, and activity classification
• Robotics applications
• Head mounted display