3D Hall-effect position sensor provides faster real-time control

1 min read

Texas Instruments (TI) has introduced what it is claiming is the industry’s most accurate 3D Hall-effect position sensor.

The sensor, the TMAG5170, will enable engineers to achieve uncalibrated ultra-high precision at speeds up to 20 kSPS for faster and more accurate real-time control in factory automation and motor-drive applications.

The sensor provides integrated functions and diagnostics to maximize design flexibility and system safety, while using at least 70% less power than comparable devices. It is the first device in a new family of 3D Hall-effect position sensors that will meet a wide range of industrial needs – from ultra-high performance to general purpose.

“Smart factories have an increasing number of highly automated systems that must operate in a more integrated manufacturing flow while simultaneously collecting data to control processes,” said Noman Akhtar, senior research analyst, Omdia. “3D position-sensing technology that delivers higher accuracy, speed and power efficiency is essential for automated equipment to quickly deliver precise real-time control for increased system efficiency and performance while reducing downtime.”

The TMAG5170 provides a low 2.6% full-scale total error at room temperature and also features best-in-class drift of 3% total error, along with at least 35% lower error than comparable devices in the presence of a cross-axis field. These features deliver higher accuracy and eliminate the need for end-of-line calibration and off-chip error compensation - simplifying system design and manufacturing.

To achieve faster, more accurate real-time control, the sensor supports measurements as high as 20 kSPS for low-latency throughput of high-speed mechanical motion.

The TMAG5170 eliminates the need for off-chip computation and enables flexible sensor and magnet orientations by integrating features such as an angle calculation engine, measurement averaging, and gain and offset compensation. The sensor’s integrated computation functions also reduce the system’s processor load by as much as 25%, enabling engineers to use general-purpose microcontrollers.

In addition, the TMAG5170 increases safety with a unique set of smart diagnostic capabilities – such as checks for communication, continuity and internal signal path – as well as configurable diagnostics for the external power supply, magnetic field and system temperature. This allows engineers to customise a safety scheme at both the chip and system level for long-term reliability and lower design costs.

The TMAG5170 also provides multiple operation modes to reduce power consumption while maintaining system performance. These configurable modes enable engineers to optimise power across a 1-SPS to 20-kSPS sampling range for battery-powered devices or light-duty modes where system efficiency is paramount.