Firmenblog über Mingjiada Electronics: Supply and Procurement of ST L3GD20/L3GD20H Three-Axis Gyroscopes; Attitude Detection for Drone Flight Control Systems

In drone flight control systems, gyroscopes are the core sensing components responsible for detecting flight attitude and maintaining stable hovering. STMicroelectronics’ L3GD20 and L3GD20H three-axis digital gyroscopes, with their ultra-compact packaging, low power consumption and high-precision angular rate measurement capabilities, have become classic sensor chips widely adopted in open-source flight control and commercial drone projects. Shenzhen Mingjiada Electronics Co., Ltd. maintains a long-term stock of genuine ST L3GD20/L3GD20H components and simultaneously purchases stock of these models at competitive prices from manufacturers, distributors and traders, providing a one-stop ‘supply and buy-back’ electronic component supply chain service.

I. L3GD20/L3GD20H: Three-axis angular rate sensors in drone flight control systems

The L3GD20 is a three-axis angular rate sensor from STMicroelectronics’ MEMS motion sensor series. It employs an integrated design combining the sensing element with a CMOS interface circuit, outputting angular rate data for the X, Y and Z axes via I²C or SPI digital interfaces. As an enhanced version, the L3GD20H has been optimised in terms of zero-offset temperature drift and noise density. Its noise density has been reduced to 0.011 dps/√Hz, representing a reduction of approximately 60 per cent compared to the 0.03 dps/√Hz of the previous-generation L3GD20, making it more suitable for industrial-grade applications and drone scenarios that demand high long-term stability.

L3GD20/L3GD20H Key Specifications

Manufacturer: STMicroelectronics

Product Type: Three-axis digital output gyroscope

Full-scale range: ±245 / ±500 / ±2000 dps (three programmable settings)

Sensitivity: 8.75 / 17.50 / 70.00 mdps/digit

Resolution: 16-bit angular rate data output

Output Interface: I²C / SPI digital interfaces

Supply Voltage: 2.2 V to 3.6 V; I/O interfaces compatible with 1.8 V

Operating Temperature: –40 °C to +85 °C

Package: LGA-16 (3.0 × 3.0 × 1.0 mm)

Power consumption in normal operation: 5.0 mA (typical)

Low-power mode: 1 μA (typical)

Noise density: 0.011 dps/√Hz @ 50 Hz

Shock resistance: 10,000 g

Start-up time: 50 ms (typical)

The L3GD20/L3GD20H features a built-in 32-level 16-bit FIFO buffer, which effectively reduces the read load on the main control chip; it integrates user-configurable high-pass and low-pass filters, facilitating bandwidth adjustment according to the flight vibration environment; the embedded temperature sensor provides 8-bit temperature data, supporting temperature compensation for the flight control system.

II. Typical Applications of the L3GD20/L3GD20H in UAV Flight Control

Attitude Detection and Attitude Estimation

The flight stability of a UAV depends directly on its attitude sensing capability. The L3GD20/L3GD20H measures the angular velocity of the aircraft around the three axes in real time, providing the flight control system with highly dynamic attitude data. In the flight control architecture of quadcopters and multi-rotor drones, the L3GD20 is often combined with a three-axis accelerometer and a three-axis magnetometer to form a 9-axis IMU. Through sensor fusion algorithms, it achieves precise attitude calculation and heading control, making it the gyroscope chip of choice for mainstream open-source flight control projects such as Pixhawk.

Gimbal Stabilisation and Camera Stabilisation

Aerial photography drones place extremely high demands on the stability of camera gimbals. The high resolution and low-noise characteristics of the L3GD20/L3GD20H enable it to precisely capture minute angular velocity changes in the gimbal. When combined with a servo control system, it achieves three-axis gimbal stabilisation, effectively eliminating the impact of flight vibrations on image quality.

Industrial Drones and Robotic Platforms

In addition to consumer-grade aerial photography drones, the L3GD20/L3GD20H is equally suitable for industrial-grade drones, robotic attitude control and heading sensing in AGV mobility platforms. Its wide operating temperature range of –40°C to +85°C and shock resistance of 10,000g ensure stable operation in challenging climatic and vibration-prone environments.

III. Mingjiada Electronics: One-Stop Supply and Procurement Services for the L3GD20/L3GD20H

Established in 1996 and headquartered in Huaqiangbei, Shenzhen, Shenzhen Mingjiada Electronics Co., Ltd. is a globally renowned electronic component stock and supply chain service provider. The company has long specialised in the full range of ST sensor chips and offers two core services centred on the L3GD20/L3GD20H:

Spot Supply Service

Supply of Genuine Components: Mingjiada Electronics maintains a long-term stock of genuine ST L3GD20, L3GD20H, L3GD20TR, L3GD20HTR and other models, providing support in the form of datasheets and technical documentation to meet the prototyping and mass production procurement needs of drone projects.

Flexible Bulk and Small-Batch Procurement: We support both large-volume orders and small-batch sample purchases, meeting requirements at various stages from R&D validation to mass production.

Stock Buy-back Service

Mingjiada Electronics offers high-value buy-back services for surplus stock of ST L3GD20/L3GD20H and related MEMS sensor chips from manufacturers, distributors and traders. The company has a professional evaluation team with nearly 20 years’ experience in chip authentication, offering rapid cash settlement with payment completed within 24 hours following successful inspection.

A streamlined and efficient purchasing process:

Submission of inventory list: Clients submit details of the L3GD20/L3GD20H chips for sale—including model, brand, quantity and production date—to Mingjiada’s assessment team via email or telephone.

Rapid assessment and quotation: Upon receipt of the list, our specialist team completes a preliminary assessment and provides a competitive market quotation within 24 hours.

Physical Verification and Contract Signing: Once both parties have reached an agreement, Mingjiada will dispatch a specialist to inspect the goods on-site. Following confirmation of the product’s appearance and quality, a formal purchase contract will be signed.

Handover of Goods and Payment: We support both on-site collection and delivery via courier; payment is arranged immediately upon completion of the inspection.

Mingjiada Electronics also offers flexible cooperation models such as consignment sales, commission sales and stock clearance. Clients may select the most suitable cooperation method based on their inventory scale and liquidity requirements.

IV. Why Choose Mingjiada Electronics’ L3GD20/L3GD20H Services

Comprehensive coverage of the full ST sensor product range. Mingjiada Electronics has specialised in the distribution and recycling of ST brand sensors for many years. In addition to the L3GD20 series three-axis gyroscopes, we also handle ST motion sensors such as the L3G4200D, I3G4250D and LSM6DS series IMUs, enabling us to provide drone flight control manufacturers with comparisons across multiple models and recommendations for alternative solutions.

Integrated supply and recycling services. For drone solution providers and flight control board manufacturers, Mingjiada Electronics serves not only as a reliable source of L3GD20/L3GD20H components but also as an efficient channel for monetising project offcuts, discontinued items and idle stock. The supply and recycling divisions share the same quality assurance system, ensuring that every chip is traceable and its quality verifiable.

Global service network. The company operates service centres in Shenzhen, Hong Kong, the United States, Japan and other locations, supporting convenient global delivery and localised responses. Domestic customers may enquire by telephone (+86 13410018555) or email (sales@hkmjd.com).

Should you require L3GD20/L3GD20H samples, bulk purchases or assistance with liquidating stock, please feel free to contact the Mingjiada Electronics evaluation team at any time!