Magnet-free Inductive Position Sensor ICs

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IDT's contactless position sensor solutions are magnet-free, significantly reducing materials costs while providing immunity to magnetic stray fields – a mandatory requirement for many applications, particularly in automotive. Instead of magnets, the inductive position sensors interface with low-cost PCB-based coils and simple metallic targets, providing single-chip design flexibility for rotary end-of shaft (on-axis) sensors, rotary side shaft (off-axis) sensors, linear motion sensors, and arc motion sensors; from small angles up to full 360° absolute angle sensing. The devices are automotive qualified and compliant to ISO 11452-8, making them suitable for use in a wide range of automotive, industrial and consumer applications.

Benefits of IDT's Contactless Position Sensor Solution

IDT's position sensors provide numerous benefits over traditional Hall Effect and xMR sensors. Some of the most important benefits include:

  • No magnets required; reduces cost
  • Stray field immunity and ISO 11452-8 compliance
  • Wide operating temperature range for harsh environments
  • Ultra-thin position sensors design options (~2mm)
  • Tolerance to mechanical misalignment
  • High accuracy in all applications (down to 0.2% full scale)
  • Single IC for on-axis and off-axis sensor designs
  • AEC-Q100 automotive qualification
  • Full resolution for every angle range

About Contactless (Non-contact) Inductive Position Sensor ICs

At their most basic function, a position senor is any device that provides measurement data based on position of a moving object. Traditional magnet-based solutions measure angular position using variations of magnetic field amplitude induced by the displacement or rotation of a moving magnet. However, these solutions are expensive and have operating temperature limitations. IDT's no-contact, magnet-free inductive position sensor ICs interface with thin PCB-based coils and a metallic target to determine position and provide accurate position data back to the system. These inductive, contactless solutions offer significant advantages in cost, temperature range, reliability, design flexibility, and immunity to magnetic stray fields.