Shenzhen Mingjiada Electronics Co., Ltd. supplies and recycles the ST LIS2HH12 three-axis linear accelerometer, featuring I²C/SPI digital output interfaces, suitable for drone applications.
The ST LIS2HH12 is a MEMS linear accelerometer specifically designed for dynamic attitude monitoring, motion trajectory acquisition and inertial navigation applications. The chip integrates high-precision triaxial sensing units and comes standard with dual I²C/SPI digital output interfaces, balancing compatibility, data transfer rates and stability. Thanks to its core advantages of compact size, low noise and high dynamic response, it has become the key sensor component for attitude sensing, flight stabilisation and motion detection in consumer-grade and industrial-grade small drones, and is widely compatible with various drone models such as multirotor aerial photography, inspection and racing drones.
I. LIS2HH12 Product Description
The LIS2HH12 is an ultra-low-power, high-performance three-axis linear accelerometer belonging to the ‘pico’ series.
The LIS2HH12 offers selectable measurement ranges of ±2g, ±4g and ±8g, and can measure acceleration at output data frequencies ranging from 10 Hz to 800 Hz.
The LIS2HH12 incorporates a First-In, First-Out (FIFO) buffer, allowing users to store data and thereby reduce the load on the host processor.
The LIS2HH12 utilises a slim, compact plastic lead grid array (LGA) package, ensuring reliable operation across an extended temperature range of –40 °C to +85 °C.
II. LIS2HH12 Core Hardware Architecture and Interface Features
The LIS2HH12 utilises a mature MEMS (Micro-Electro-Mechanical Systems) manufacturing process and integrates X, Y and Z-axis acceleration detection units onto a single chip, enabling the simultaneous acquisition of three-dimensional linear motion data. It accurately captures dynamic states such as translation, tilt, vibration and falls during drone flight, thereby addressing the limitations of single- and dual-axis sensors in terms of detection dimensions.
Interface compatibility is a key highlight of this device’s suitability for drone systems. The LIS2HH12 natively features dual digital interfaces—I²C and SPI—enabling flexible adaptation to different drone main control hardware solutions: the I²C interface features simple wiring and requires few pins, making it suitable for integration with the main control units of lightweight, compact drones; it can be connected in parallel with various sensors, such as gyroscopes and barometers, to achieve multi-sensor data fusion; The SPI interface offers higher data transfer rates and stronger interference resistance, meeting the real-time data transmission requirements of drones during high-speed flight and rapid dynamic attitude changes, whilst effectively preventing flight data delays and frame loss. The dual-interface design significantly enhances hardware adaptability, enabling compatibility with mainstream drone control chips without the need for additional adapter circuits, thereby reducing overall hardware development costs and the physical footprint of the drone.
Furthermore, the LIS2HH12 features a compact package design; it is small and lightweight, placing no additional load on the drone’s airframe. It perfectly aligns with the design requirements for lightweight and compact drones, making it particularly suitable for micro aerial photography drones and portable inspection drones—devices subject to stringent payload and size constraints.
III. Core Performance Parameters of the LIS2HH12
The LIS2HH12 has undergone specialised performance optimisation for dynamic drone flight scenarios. Its core parameters are tailored to the key requirements of drone attitude control and safety protection, with balanced specifications and excellent reliability:
- Multi-range adaptive detection: Supports four acceleration measurement ranges—±2g, ±4g, ±8g and ±16g—to accommodate different flight scenarios: the high-precision ±2g range is used for routine, stable flight to ensure precision in attitude fine-tuning; for high-speed manoeuvres, dives and turbulent flight scenarios, switch to the high-range settings of ±8g and ±16g to prevent data distortion caused by exceeding the measurement range, comprehensively covering both routine and extreme flight conditions for drones.
- High resolution and low-noise output: Featuring a built-in high-precision analogue-to-digital conversion unit with excellent output resolution, combined with the chip’s native low-noise circuit design, it effectively filters out sensor noise caused by drone motor vibrations and airflow disturbances. This accurately extracts true flight attitude data, providing clean and reliable raw data for flight control algorithms, thereby eliminating attitude drift and flight vibration issues.
- Stable operation across a wide temperature range: With an operating temperature range of -40°C to +85°C, it is suitable for outdoor environments such as high-altitude cold conditions, intense summer heat and complex temperature variations in the wild. This resolves the issues of data drift and sensor failure at extreme temperatures commonly experienced by standard sensors, ensuring stable all-weather flight for the drone.
- Ultra-low power consumption: Supports multiple power-saving operating modes; power consumption is extremely low in active detection mode, whilst sleep mode further reduces energy usage. This effectively minimises power drain on the drone’s onboard power supply, extending flight endurance and making it suitable for small drones with limited battery capacity.
- High-speed data output: Supports adjustable data output rates across multiple levels, meeting the high-frequency sampling requirements of drone flight control systems. It provides real-time feedback on changes in the airframe’s attitude, ensuring rapid response and precise parameter adjustment by the flight control system.
IV. Application Advantages of the LIS2HH12
1. Precise attitude stabilisation and balance control
During flight, drones are prone to attitude deviations caused by air currents and airframe vibrations. The LIS2HH12 captures real-time data on changes in three-axis linear acceleration. Combined with flight control algorithms, it calculates the airframe’s tilt angle, horizontal offset and movement trends, providing rapid feedback on airframe attitude deviations. This assists the flight control system in promptly adjusting motor speed and airframe attitude, enabling autonomous hovering, stable flight and fine-tuning of attitude. It significantly enhances the drone’s flight stability and control precision, serving as the core sensor support for the drone’s self-stabilisation system.
2. Intelligent Safety Protection Monitoring
Leveraging its high-precision acceleration detection capabilities, the chip enables multiple layers of safety protection for the drone, including free-fall detection, collision detection and abnormal attitude detection: When the drone experiences abnormal conditions such as uncontrolled falls, mid-air collisions or severe tilting, the sensor instantly detects sudden changes in acceleration, triggering the flight control system’s emergency protection mechanisms to initiate emergency hovering, power-off protection and attitude reset. This effectively reduces the risk of drone crashes and damage, thereby enhancing flight safety.
3. Multi-sensor Fusion Navigation and Positioning
Precise drone flight relies on the fusion of data from multiple sources. The LIS2HH12 can be combined with MEMS gyroscopes and GPS and barometric sensors to form a micro-inertial measurement unit (IMU). By cross-referencing acceleration data with angular velocity data, it corrects measurement errors from individual sensors to achieve high-precision inertial navigation. This compensates for the shortcomings of weak GPS signals and positioning drift, effectively improving the positioning accuracy of the drone during stationary hovering, route flight and autonomous inspections, and is suitable for high-precision operational scenarios such as aerial photography and surveying, fixed-point inspections and route patrols.
4. Suitable for lightweight system design
The chip requires no external conditioning circuitry and provides three-axis acceleration detection on a single chip. Combined with a minimalist I²C/SPI interface circuit, it significantly simplifies the hardware circuit design of drones and reduces the space occupied on the PCB. At the same time, its ultra-low power consumption meets the low-power endurance requirements of drones, balancing the three core design principles of miniaturisation, lightweight construction and long endurance, making it perfectly suited to the development needs of consumer-grade micro-drones and industrial lightweight inspection drones.
V. Summary of the LIS2HH12
The ST LIS2HH12 three-axis linear accelerometer, with its comprehensive advantages—including high compatibility via dual I²C/SPI interfaces, high precision and low noise, high stability across a wide temperature range, ultra-low power consumption, and a compact, lightweight design—precisely meets the core application requirements of drone attitude control, safety protection and inertial navigation. Compared to standard accelerometers, it offers faster dynamic response, greater environmental adaptability and more flexible hardware integration. It effectively enhances drone flight stability, manoeuvrability and flight safety, making it the preferred core component for inertial sensing systems in small drones. It is widely applicable across various drone scenarios, including consumer aerial photography, industrial inspection, security surveillance and racing.
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