ASM330LHXG1 is a new generation **AEC‑ Q100 automotive grade 6-axis inertial measurement unit IMU** from STMicroelectronics, integrating a three-axis accelerometer + three-axis gyroscope, specifically designed for in-vehicle non-safety motion sensing and navigation scenarios.

ASM330LHXG1

Sensing architecture: three-axis accelerometer + three-axis gyroscope, six-axis data hardware synchronous output, ensuring unified timing, suitable for sensor fusion algorithm

2. Programmable measurement range

- Accelerometer: ± 2g / ± 4g / ± 8g / ± 16g four-speed options, suitable for body vibration, sudden acceleration, and bumpy road detection

- Gyroscope: ±125-±250-±500-±1000-±2000-±4000 degrees per second, six ranges, low-speed heading, high-speed violent rotation can be covered by STMicroele...

3. ADC resolution: 16-bit high-precision analog-to-digital conversion for all channels

4. Output rate: Up to 6.66 kHz ODR

5. Operating voltage: 1.71 V~3.6 V, suitable for low-voltage power supply of vehicle system

2. Automotive reliability parameters

1.Automotive standard certification: **AEC‑ Q100**, rigid standard for automotive components

2.Ultra-wide operating temperature range: **-40℃ ~ + 125℃**;Compared with the standard version ASM330 LHH (upper limit 105 ℃), the XG1 version has upgraded high-temperature resistance and can be arranged in high-temperature harsh positions such as around the engine, trunk, and roof. STMicroele...

3. Factory calibration in the full temperature range, built-in hardware temperature compensation circuit, suppression of zero drift in the full temperature range

3. Packaging specifications

Model: LGA-14L

- Size: 2.5 mm ×3.0 mm ×0.83 mm, ultra-thin and small chip package, saving space on the vehicle PCB

- Shipping specification: Roll-up packaging ASM330 LHHXG1TR

- ST15 long-term supply guarantee, suitable for automotive companies' long-term projects and mass production inventory

2. Sensing performance dimension (core advantage)

1. **Ultra-low noise hardware process**

The noise density of the accelerometer is as low as 60μg / √Hz, and the noise density of the gyroscope is 5 mdps / √ Hz;Relying on ST's mature MEMS micro-manufacturing process, the signal-to-noise ratio is excellent in the vibration environment, reducing the measurement interference caused by body vibration.

2. Excellent zero bias stability, extremely low angle random walk

The long-term static drift is very small, which solves the problem of severe heading deviation of ordinary consumer-grade IMU for more than ten minutes, and is suitable for GNSS blind spot navigation calculation.

3. Six-channel hardware synchronous sampling

Three-axis acceleration, three-axis gyroscope sampling clock hardware alignment, no timing deviation; For inertial navigation, attitude calculation, and sensor fusion algorithms, temporal synchronization is the key prerequisite for precise positioning.

4. Stability in the whole temperature range

Embedded exclusive temperature compensation logic, sensitivity and zero drift are significantly suppressed in high and low temperature environments, and stable measurement accuracy is maintained in summer sun exposure and winter low temperature.

III. Built-in hardcore function dimension (different from ordinary six-axis sensor)

 1. Embedded MLC machine learning kernel

The chip has an embedded hardware machine learning processing core, which can complete motion state recognition locally at the sensor end, It can recognize actions such as bumps, sudden stops, stops, vibrations, and body tilting, and **does not need to frequently wake up the main MCU**, which greatly reduces the power consumption of the vehicle control system and reduces the burden on the CPU.

2.16 programmable finite state machine FSM

Users can customize trigger conditions, set motion interruption, vibration trigger, attitude alarm, suitable for anti-theft vibration detection, collision sensing, body attitude trigger function.

3.3KB high-capacity hardware FIFO data buffer

It can cache a large amount of six-axis inertial data; When the master is busy and the communication is temporarily interrupted, the sensing data will not be lost, reduce the frequency of MCU polling, optimize system power consumption, and is the key configuration for long-term data recording in vehicles....。

4. Sensor Hub Interface

It can access external sensors, realize the combination of multi-sensing data collection, and facilitate the construction of multi-sensor combination perception scheme.

IV. Dual working mode - power consumption dimension

The ASM330LHHG1 has a fixed dual-mode switch, can be freely configured by software, and balances high precision and low power consumption requirements:

1. **High-performance mode**: Full open sampling rate, low noise output, for tunnel navigation, vehicle attitude monitoring, high-speed motion capture;

2. **Low power mode**: Reduce sampling frequency, sleep-mode acquisition, suitable for parking theft monitoring, long-time standby detection, and battery-powered vehicle peripherals.

It supports three mainstream car digital interfaces and is compatible with most car main control chips:

1. I2C；

2. SPI；

3. MIPI‑I3C

The I3C high-speed interface can realize high-speed sensor data transmission, adapt to the new generation of intelligent vehicle hardware, and be compatible with traditional I2C devices, so that new and old projects can be directly migrated.

6. Break down the application scenarios dimension

The device is positioned for **vehicle non-safety applications** and cannot be used for autonomous driving safety redundancy, covering the vast majority of body perception needs:

1. **Vehicle navigation and position calculation (core use)**

When GNSS satellite signals are lost in tunnels, elevated urban canyons, and underground garages, IMU inertial data can be used to calculate the vehicle's position and maintain continuous navigation positioning.Compatible with CarPlay, Android‑Auto vehicle host positioning standard STMicroele...。

2. Vehicle network V2X, vehicle remote information processing T-BOX

TBOX terminal vehicle attitude, vibration monitoring, driving status reporting.

3. Vehicle security field

Car anti-theft vibration alarm, tow truck detection, illegal movement alarm.

4. Vehicle perception function

Rapid acceleration, rapid deceleration, bump road recognition, collision impact detection, seat comfort system adjustment.

5. ETC electronic payment terminal, vehicle recorder attitude correction, commercial vehicle / agricultural machinery and engineering machinery motion monitoring.

VII. Horizontal comparison dimension of the same series and competitors

1. Compared with the standard version ASM330 LHH

- ASM330 LHH: Maximum temperature + 105 ℃

- ASM330 LHHXG1: Upgraded to withstand high temperatures up to +125°C, can be deployed in high-temperature harsh areas, all other hardware, MLC kernel, FIFO configuration inherited.

Compared with ordinary consumer-grade IMU (MPU6051, etc.)

1. With AEC-Q100 automotive qualification, it can withstand the harsh vibration and high-temperature environment in the vehicle;Consumer-grade sensors only support ‑40 ~ 85 ℃;

2. The onboard hardware includes MLC, FSM state machine, and 3KB FIFO, but the consumer-grade IMU has almost no on-chip processing capability;

3. Supports I3C high-speed bus with noise and zero-drift indicators one level higher;

4. ST provides long-term supply, and there will be no risk of sensor shortage due to consumption.

Compared with other brands' automotive IMU in the same price range

ST's entire MEMS process is mature, the temperature compensation algorithm is mature, the official application notes AN5985 and AN5986 are complete, the development materials are rich, the popularity of domestic vehicle projects is high, and the threshold for hardware debugging is lower.

Common specifications of STMicroelectronics:

LIS2DWLTR

LSM6DSV16XTR

LSM6DSV32XTR

L9663-TR-1

LSM6DSOETR3

LSM6DSK320XTR

ISM330DHCXTR

ASM330LHHTR

SPC584B70E3EHC0X

STM32H563MIY3QTR

STM32F0316DIE1

STM32G473VCT6

STM32H7B0ZBT6

STM32L053R8T6

ST (STMicroelectronics) sensors; 3D accelerometer; Temperature sensing; ST sensor; Sensor Gyroscope

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