Dear MPS Technical Support,
I would like to confirm whether the MagAlpha evaluation board TBMA782‑Q‑LT‑00A can be used for the following steering‑angle measurement application in an automotive environment.
Application Requirements:
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Measurement target: Steering angle during circuit driving
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Required bandwidth: 20 Hz
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Required resolution: 0.1 deg
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Maximum rotation angle: ±360 deg (total 720 deg)
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Installation mode: Side‑shaft mode
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The steering main shaft is a 14 mm steel spline shaft
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Due to mechanical constraints, a magnet cannot be placed on the end of the shaft
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The magnet must be installed on the side surface of the shaft
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If a ring‑type magnet is strongly recommended, installation is possible by disassembling the steering system, but it is mechanically difficult
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Microcontroller: Arduino (SPI communication planned)
Magnet candidates:
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Currently undecided
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Preferably a button‑type magnet attached to the side surface of the shaft, with the sensor mounted on the vehicle body side
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If a ring‑type magnet is recommended for optimal performance, the required inner diameter would be approximately 14–15 mm, but installation is mechanically challenging
Questions:
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Can TBMA782‑Q‑LT‑00A (MA782) operate properly in side‑shaft mode on a 14 mm steel spline shaft?
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For side‑surface magnet mounting and sensor mounting on the vehicle body side, which magnet type is recommended:
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Button‑type magnet (attached to the shaft side surface), or
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Ring‑type magnet (inner diameter 14–15 mm)?
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What is the recommended sensor‑to‑magnet distance for MA782 in side‑shaft mode?
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What level of periodic angle error should be expected in side‑shaft mode, and what calibration method is recommended to achieve 0.1 deg accuracy?
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Are there any limitations or considerations when using Arduino for SPI communication with MA782?
If additional information is required, I can provide detailed mechanical drawings and installation conditions.
Best regards,