STMicroelectronics LSM6DSV320X 6-Axis Inertial Measurement Unit (IMU)

STMicroelectronics LSM6DSV320X 6-Axis Inertial Measurement Unit (IMU) is a sophisticated IMU that integrates a 3-axis digital low-g accelerometer, a 3-axis digital high-g accelerometer, and a 3-axis digital gyroscope. This STMicroelectronics IMU is designed to deliver precise motion detection and sensor fusion capabilities, making it ideal for car crash detection, sports monitoring, and Internet of Things (IoT) devices. The LSM6DSV320X features a quad-channel architecture that processes acceleration and angular rate data on four separate channels, each with dedicated configuration, processing, and filtering. Additionally, the device supports embedded AI and sensor fusion through a finite state machine (FSM) for configurable motion tracking and a machine learning core (MLC) for context awareness.

The LSM6DSV320X offers adaptive self-configuration (ASC), which automatically reconfigures the device in real time based on specific motion patterns or decision tree outputs from the MLC. This IMU also includes a dedicated high-g accelerometer sensor for high-g shock detection, making it suitable for applications requiring robust impact detection. Other notable features include a smart FIFO with up to 4.5KB for efficient data management and standard interrupts such as free-fall, wake-up, 6D/4D orientation, click/double click, high-g wake-up, and high-g shock. The LSM6DSV320X is designed to optimize system power consumption while providing a "smart, always-aware" experience.

Features

Quad-channel architecture for UI, EIS, OIS, and high-g data processing
"Smart, always-aware" experience for system power optimization
Smart FIFO up to 4.5KB data buffering, data can be compressed two or three times
- 100% efficiency with flexible configurations and partitioning
- Possibility to store timestamp
Dual accelerometer channels
- Low-g channel ±2g, ±4g, ±8g, and ±16g full scale
- High-g channel ±32g, ±64g, ±128g, ±256g, and ±320g full scale
±250dps, ±500dps, ±1000dps, ±2000dps, and ±4000dps full scale
SPI/I²C and MIPI I3C^® v1.1 serial interface with main processor data synchronization
Auxiliary SPI and MIPI I3C v1.1 for OIS data output for gyroscope and accelerometer
Sensor hub with up to six total sensors
- Two internal (accelerometer and gyroscope)
- Four external sensors
OIS configurable from the auxiliary or primary interface
EIS dedicated channel on primary interface with dedicated filtering
Advanced pedometer, step detector, and step counter
Significant motion detection, tilt detection

Free-fall, wake-up, 6D/4D orientation, click/double click, high-g wake-up, and high-g shock event-detection interrupts (fully configurable)
Programmable finite state machine for accelerometer (high-g and low-g), gyroscope, and external sensor data processing with a high rate at 960Hz
Machine learning core with exportable features and filters for AI applications
Embedded adaptive self-configuration (ASC)
Embedded sensor fusion low-power (SFLP) algorithm
Embedded temperature sensor
Independent I/O supply
- 1.62V to 3.6V I²C voltage range
- 1.08V to 3.6V SPI/MIPI I3C extended voltage range
Supply current in combo high-performance mode
- 6-axis configuration at 0.67mA
- 9-axis configuration at 0.80mA
2kV maximum HBM ESD protection
-40°C to +85°C operating temperature range
Compact 2.5mm x 3mm x 0.83mm footprint, LGA-14L package
ECOPACK and RoHS compliant

Applications

IoT and connected devices
Asset tracking
Smartphones and handheld devices
Car crash and shock detection
Wearables
Motion tracking and gesture detection

Augmented reality (AR), virtual reality (VR), mixed reality (MR) applications
Indoor navigation
EIS and OIS for camera applications
Vibration monitoring and compensation

Resources

TN0018 - Handling, mounting, and soldering guidelines for MEMS devices
DT0064 Design Tip - Noise analysis and identification in MEMS sensors, Allan, Time, Hadamard, Overlapping, Modified, Total variance
DT0105 Design Tip - 1-point or 3-point tumble sensor calibration

DT0106 Design Tip - Residual linear acceleration by gravity subtraction to enable dead-reckoning
MEMS and Sensors Brochure - Smart Motion tracking, IoT for an enhanced user experience
Sensor Libraries Brochure - Software pack for STM32Cube