Allegro MicroSystems, Inc., a global leader in sensing and power solutions for motion control and energy-efficient systems, announced the A31316 3D Hall-effect position sensor, the latest addition to the company’s 3DMAG line of 3D sensors. Offered in an industry-smallest 4 × 4 mm body PCB-less package, this new sensor is ideal for automotive safety and advanced driver assistance systems (ADAS) applications that require high levels of flexibility and reliable performance in harsh conditions such as powertrain and chassis applications, as well as industrial applications that require linear or rotary sensing.
Powertrain and chassis applications, passenger restraint systems, and shifter systems, are subjected to environmental vibrations and contaminants that can degrade performance. The position sensors used in powertrain and chassis applications typically require support components, like PCBs and capacitors, and—when a position sensor is required in a dirty, high-vibration environment—the assembly of system components can become corrupted by debris and vibration, which can inhibit the performance of the assembly. The same is true for many industrial linear and rotary sensing applications. Designers are challenged to fit robust designs within the allotted dirty, high-vibration space.
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The A31316 3D Hall sensor eliminates the need for a PCB or other external components. This sensor integrates the die and capacitors in a single package to address the need for high-performance, compact position sensors that are robust to these environments. For vibration-robust designs, the A31316 pins can be welded or soldered directly to connector leadframes and can be overmolded or potted for a tight seal. These integration options greatly reduce the ability for contaminants and vibration to affect performance and can bring new design flexibility to spaces where mechanical vibration and contamination are potential issues.
Designed for both rotary and long-stroke linear applications, the A31316 maintains high angle accuracy across the full Grade 0 temperature range (–40°C to 150°C). Its flexible calibration table (33 fixed points or 22 freely placed points) enables options that can reduce the time and complexity of end-of-line calibration and minimize errors due to mechanical misalignment. The A31316 contains advanced on-chip diagnostic features to ensure reliable, safe operation.