STMicroelectronics ASM330LHHXG1 inertial measurement unit

The STMicroelectronics ASM330LHHXG1 inertial measurement unit (IMU) for automotive applications combines in-sensor AI with enhanced low-power operation and an 125°C operating temperature range for harsh environments.

The automotive IMU contains a 3-axis accelerometer and 3-axis gyroscope and draws less than 800 µA with both sensors running, cutting the system power budget and encouraging use in always-aware applications. In-sensor AI leverages the built-in machine-learning core (MLC) and finite state machine (FSM), offloading the host processor and enabling low-latency, energy-efficient event detection and classification. The temperature range gives flexibility to deploy smart sensors containing the ASM330LHHXG1 in harsh locations including near engine components, in direct sunlight or whenever onboard power dissipation might increase the temperature above standard operating levels.

With the integrated MLC and FSM, the automotive IMU handles applications that require a deterministic response with minimal power demand. These include navigation assistance and telematics, theft prevention, impact detection and motion-activated functions.

ST’s MEMS ecosystem helps accelerate evaluation, prototyping and development with the automotive IMU, leveraging Unico-GUI and AlgoBuilder tools and MEMS-sensor adapter boards (STEVAL-MKI243A).

While the IMU has dual operating modes that let designers optimise the data-update rate and power consumption, the accelerometer and gyroscope are designed to maintain stability over time and temperature. The accelerometer has a selectable full-scale range of ±2/±4/±8/±16g, while the gyroscope’s angular rate can be set to ±125, ±250, ±500, ±1000, ±2000 or ±4000 degrees/s.

The automotive inertial measurement unit is AEC-Q100 qualified and in production now. It is available in an over-moulded 14-lead plastic land grid array (LGA) package.