Melexis 3D Magnetic Sensing Enables High-Precision Motion Control for Robotic Actuators.

Amid the rapid advancement of industrial automation and intelligent robotics, robotic servo systems, as core motion execution components, directly determine the precision and reliability of robotic movements. Traditional servos typically rely on potentiometers or single-axis Hall sensors for position feedback, which face limitations such as mechanical wear, restricted accuracy, and single-axis sensing capabilities. In contrast, 3D magnetic sensing technology enables absolute non-contact measurement of servo rotation angles and positions by simultaneously detecting magnetic field variations across the X, Y, and Z axes. This approach not only eliminates the lifespan constraints associated with physical contact but also provides higher linearity and anti-interference capabilities, offering a more precise and durable solution for robotic joints.

To meet the power supply voltage requirements of robotic servos (typically 5V–12V systems), 3D magnetic sensors supporting a wide voltage range demonstrate significant advantages. Their broad operating voltage compatibility allows direct integration with the servo’s main control power supply, eliminating the need for additional voltage conversion circuits and simplifying system design. In terms of accuracy, these sensors achieve angular measurement errors within ±0.1°, ensuring precise motion trajectory control for multi-joint robots. Meanwhile, microsecond-level response speeds meet the real-time closed-loop control demands of high-speed servos, while an operating temperature range of -40°C to 125°C guarantees long-term stability in harsh industrial environments.

Melexis’s MLX90378GVS-ABJ-307 is an AEC-Q100-certified high-performance 3D magnetic sensor designed for applications requiring high-precision position detection. The chip employs Triaxis® Hall technology to simultaneously sense the magnetic field components in the planar (X, Y) and vertical (Z) directions, enabling true three-dimensional position detection. Key parameters and competitive advantages are summarized below:

The device features a programmable DSP core for signal processing, allowing users to flexibly configure sensitivity, output range, and linearization curves to adapt to different magnetic circuits and mechanical structures. Its SENT (Single Edge Nibble Transmission) output protocol offers strong anti-EMI capability, making it ideal for noisy industrial environments during motor operation. As an authorized partner of Melexis, MANDU provides comprehensive technical support, including chip selection, magnetic circuit simulation, sample applications, and mass production integration services, helping customers accelerate the development of high-performance servos.

For robotic servo designers pursuing high precision and reliability, the Melexis MLX90378GVS-ABJ-307 3D magnetic sensor is an ideal choice. Its exceptional three-dimensional magnetic sensing capability, wide voltage adaptability, and robust design significantly enhance servo performance and product competitiveness. Through MANDU’s localized technical services, customers can achieve efficient product integration and gain a leading edge in core robotic components.

About Mandu Technology

Shenzhen Mandu Technology Co., Ltd. has steadfastly centered its operations on the distribution of high-performance, high-quality, and highly reliable integrated circuit products. Its portfolio encompasses memory chips, differential crystal oscillators, and MCU microcontrollers, while progressively integrating analog signal chain products. The company prides itself on delivering comprehensive and cost-effective solutions to its customers. Its products find applications across a broad spectrum of industries, including but not limited to network communication, industrial control, robotics, medical equipment, personal health, and numerous other fields.

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