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TMAG5170-Q1: Suitability Review of TMAG5170-Q1 for Linear Position Detection

Manohar K
Prodigy 60 points
Part Number: TMAG5170-Q1
Other Parts Discussed in Thread: TMAG5170

Tool/software:

Hi

We are currently exploring position sensing solutions for a project that involves non-contact linear position detection. We are considering the TMAG5170-Q1 Hall-effect sensor and would appreciate your guidance on its suitability for our specific setup.

Wrench Application Overview:

  • Function: Detect linear position of a magnetic target

  • Motion Type: Vertical linear movement (0–200 mm stroke)

  • Target: Magnetic element mounted to a moving iron component

  • Sensor Mounting: Inside enclosure, side-mounted

  • Barrier: 0.5 to 2 mm fixed aluminum plate between sensor and target

  • Sensor-to-Target Gap: Approx. 5-10 mm

  • Required Accuracy: ±1 or 2 mm

  • Environment: Zone 1 hazardous area, requires intrinsically safe components

Is this component compatible with my application parameters?

Regards, 
Manohar.

  • 0
    TI__Mastermind 21250 points

    Manohar,

    We have a reference design which you will likely find helpful here.  Please take a look at the documentation below:

    https://www.ti.com/tool/TIDA-060045

    200mm is quite a large range for a single sensor.  This is primarily determined by the size of the magnet and the strength of the field at larger ranges. Often this motion would be tracked using multiple sensors placed in a linear array.

    Thanks,

    Scott

  • 0 in reply to Scott Bryson
    Prodigy 60 points

    Thank you for your response, Scott Bryson.

    We are currently planning to use a magnet with a length of 100 mm for our application. Could you please advise on the required magnetic field strength needed for reliable detection in this setup?

    Regards,
    Manohar.

  • 0 in reply to Manohar K
    TI__Mastermind 21250 points

    Manohar,

    TMAG5170 has three selectable input ranges depending on the product variant used.

    A1 can be set to +/-25mT, +/-50mT, and +/-100mT

    A2 can be set to +/-75mT, +/-150mT, and +/-300mT

    Typically I would recommend to target around 80-90% of the full scale input range to make best use of the sensitivity of the device and maximize your SNR.  

    Thanks,

    Scott