Analog/Mixed Signal

Inductive sensing IC immune to magnetic fields

17 December 2021
The inductive sensing IC is designed to less the effort of ECUs in vehicles. Source: Melexis

Melexis has introduced an inductive interface IC, immune to stray magnetic fields, that serves as a high-speed resolver that minimizes the electronic control unit (ECU) effort required in electric motors, brake boosters and e-power steering applications.

Called the MLX90510, the chip offers differential sine and cosine analog outputs and is based on a digital architecture that includes a tracking loop technology.

The chip’s benefits include:

  • System propagation delay is trimmed to 0 ns with a maximum of +/- 120 ns residual variation over the entire operating temperature range.
  • Input offset compensation and zero output-angle position adjustment performed in the IC.
  • A three-phase based coil design.
  • Decoupling between the input and output ensuring stable output amplitudes independently from the airgap related input signal strength.
  • Up to 16 calibration points that deals with the non-linearities of challenging sensor modes like side-of-shaft.

The chip works in combination with a set of PCB based coils that is scalable and easily adapted to the number of pole-pairs of the motor.

To contact the author of this article, email PBrown@globalspec.com


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