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TMAG6180-Q1: Off axis sin cos encoder

Sayali Shinde
Prodigy 60 points
Part Number: TMAG6180-Q1
Other Parts Discussed in Thread: TMAG6180, TMAG5170-Q1, TMAG5253, TMAG5170, DRV5055, LDC5072-Q1

Tool/software:

Hello Team,

    we want to develop sin cos off axis encoder. your chip TMAG6180-Q1 suits to our application ,it matches all our requirement accept off axis.

can you recommend any other chip similar to this but off axis (snapshot shown below, it should able to sense from side of magnet and have supply rating of 5V

  • 0
    TI__Mastermind 21120 points

    Sayali,

    Thanks for reaching out.  In this position, there is a large mismatch in amplitude for the X and Y components.  This creates a non-linear change for the angle of the input magnetic field.  TMAG6180 would require the sampled result to go through calibration to provide a more linear result, unless you can adjust the vertical position to a point where the input  X and Y components have a matched amplitudes.

    TMAG5170-Q1 may be better suited for this application however.  It allows for gain adjustment and has configurable sensitivity ranges that will allow for amplitude correction before the angle calcuations.

    Thanks,

    Scott

  • 0 in reply to Scott Bryson
    Prodigy 60 points

    Hello Scott,

       Thank you quick response. but TMAG6180 would be operating in on axis mode  and we required off axis due to dimension constraint in our desing.

    can you suggest similar sin cos encoder chip which can work in off axis or rather in all direction.

    Regards,

    Sayali

  • 0 in reply to Sayali Shinde
    TI__Mastermind 21120 points

    Sayali,

    Unfortunately, we don't currently offer another magnetic device with analog outputs for both sine and cosine.  It could be accomplished by placing two 1D linear Hall-effect sensors such as TMAG5253 or DRV5055, or you could use a digital output 3D Hall-effect sensor like TMAG5170.  The 3D sensor will allow for off-axis measurements.

    Another option would be to use an inductive sensor such as LDC5072-Q1 which also supports the sine and cosine outputs in one device.

    thanks,

    Scott

  • 0 in reply to Scott Bryson
    Prodigy 60 points

    Thanks Scott for confirmation