STMicroelectronics Unveils Automotive IMU for Precise Dead-Reckoning and Navigation

STMicroelectronics has introduced the ASM330LHHG1, an AEC-Q100-qualified inertial measurement unit designed for automotive and industrial vehicle applications. The device operates across a temperature range of -40°C to 125°C, allowing deployment in vehicle zones where thermal conditions may otherwise constrain component placement.

Modern vehicles increasingly rely on satellite navigation for routing, tracking, and driver-assistance functions. However, continuous positioning performance depends on maintaining accuracy between satellite updates and during periods when GNSS signals are unavailable or degraded. Dead reckoning, estimating position based on known motion data, serves as a key continuity mechanism in these scenarios.

The ASM330LHHG1 addresses this requirement through a 6-channel synchronized output that delivers 3-axis accelerometer and 3-axis gyroscope data with consistent signal timing. ST states that both sensors employ the latest MEMS fabrication processes and include integrated temperature compensation to reduce bias drift and maintain measurement stability across operating conditions.

Beyond navigation, the IMU supports a range of non-safety vehicle systems. The accelerometer provides a full-scale range of ±16g, while the gyroscope covers ±125 degrees per second up to ±4,000 degrees per second. Intended applications include vehicle-to-everything communications, telematics, eTolling, anti-theft systems, impact detection, crash reconstruction, driving comfort monitoring, vibration compensation, and motion-activated functions.

The unit offers dual operating modes covering both high-performance and low-power configurations, enabling designers to balance positioning accuracy against power consumption. Digital connectivity is provided through I²C, MIPI I3C®, and SPI interfaces, and a 3KB on-chip FIFO buffer is available to reduce host-processor load. The device is packaged in a compact 2.5 mm × 3.0 mm LGA-14L format and is in production now.