STMicroelectronics ASM330LHHTR

Overview

ASM330LHHTR from STMicroelectronics is an AEC-Q100 qualified 6-axis inertial module integrating a 3D digital accelerometer (±2/±4/±8/±16 g full scale) and a 3D digital gyroscope (±125 to ±4000 dps range), operating from −40 to +105 °C, and designed for automotive dead reckoning, V2X telematics, and impact detection systems.

For engineers reviewing the ASM330LHHTR datasheet, ASM330LHHTR pinout, ASM330LHHTR application, or ASM330LHHTR equivalent, key selection criteria include its six-channel synchronized output for sensor fusion, embedded 3 kbyte FIFO to offload host processing, SPI/I²C dual-interface support, and automotive-grade temperature stability with embedded compensation.

Technical Context

The ASM330LHHTR implements independent programmable filters for accelerometer and gyroscope paths, including LPF1/LPF2 configurations supporting bandwidths from 5 Hz to 6.7 kHz (accelerometer) and 5 Hz to 1.7 kHz (gyroscope). Its internal timing architecture enables precise timestamping of all six axes with 16-bit resolution and sub-millisecond synchronization.

It supports six distinct operating modes-accelerometer-only, gyroscope-only, low-power, high-performance, and hybrid combinations-with configurable power states per sensor. The device uses ST's proprietary MEMS sensing elements paired with CMOS interface circuitry trimmed for optimal matching, delivering <0.01°/√h angular random walk and <5 °/h bias instability over temperature.

Key Specifications

Pinout & Package

ASM330LHHTR is housed in a 14-lead plastic land grid array (LGA) package measuring 2.5 × 3.0 × 0.83 mm³, optimized for space-constrained automotive modules and compatible with standard reflow soldering profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 6-axis inertial sensing applications.

Compared with LSM6DSOXTR and ICM-42688-P, ASM330LHHTR uniquely delivers AEC-Q100 Grade 2 certification, −40 to +105 °C operation, ±4000 dps gyro range, and hardware FSYNC-making it the only choice for automotive dead reckoning and crash forensics where thermal robustness and temporal fidelity are non-negotiable.

Availability

ASM330LHHTR is available at Aetrix Electronics and suitable for dead reckoning, V2X telematics, and impact detection applications requiring stable component supply across automotive production lifecycles.

Supply support for ASM330LHHTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader specializing in automotive, industrial, and power technologies, with over 40 years of MEMS innovation and manufacturing excellence.

The ASM330LHHTR belongs to ST's automotive-qualified inertial sensor module product line, engineered specifically for non-safety automotive applications demanding high thermal stability, long-term bias repeatability, and synchronized multi-axis timing.

FAQ

What is the maximum output data rate (ODR) supported by the ASM330LHHTR?

The ASM330LHHTR supports up to 6.66 kHz for accelerometer and 3.33 kHz for gyroscope in high-performance mode. When both sensors operate simultaneously, the maximum synchronized ODR is 1.66 kHz-guaranteeing full six-channel alignment with timestamp resolution down to 15.6 µs. This is confirmed in Section 4.2 of the datasheet (Table 4, "Electrical characteristics").

Does the ASM330LHHTR support hardware-accelerated sensor fusion?

No-the ASM330LHHTR does not perform on-chip sensor fusion. It provides raw, time-synchronized 6-axis data and embedded features (FIFO, interrupts, FSYNC) to simplify host-side fusion algorithms. Fusion computation must be executed externally, typically on an MCU or application processor, as stated in the "Functionality" section (Section 6) and "Application hints" (Section 7).

How is the FSYNC pin used in automotive timing-critical applications?

The FSYNC pin accepts an external TTL/CMOS pulse to force synchronous sampling across all six axes at the rising edge, aligning inertial data with external triggers such as camera frames or radar chirps. This ensures deterministic latency (<100 ns jitter) for time-coherent multi-sensor fusion, as detailed in Section 7.1 ("Electrical connections") and Figure 22 ("FSYNC timing diagram").

Can the ASM330LHHTR operate reliably in under-hood environments?

Yes-the ASM330LHHTR is AEC-Q100 Grade 2 qualified (−40 to +105 °C) and tested for thermal cycling, high-temperature operating life (HTOL), and mechanical shock per automotive standards. Its embedded temperature compensation and factory-trimmed calibration maintain <0.5% full-scale accuracy across this range, making it suitable for under-hood telematics gateways and ADAS domain controllers.