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LDC0851 length of the coil and the device of cable

Other Parts Discussed in Thread: LDC0851

Hi expert

My customer think to use the coil at the maximum 200mm of cable from LDC0851.

What is the usable cable length?

Also, please tell us noise measures to the cable.

My customer is considering positively.

Best Regars.

Fukazawa

  • Hello Fukazawa-san,
    it is great that your customer is having success with the LDC0851.
    Our other LDCs support remote sensing (maximum cable length calculator is included here: www.ti.com/.../getliterature.tsp
    The sensing mechanism for the LDC0851 is a bit different because it compares a sense and a reference coil. It is possible to use cables between the IC and the sensor, but I generally recommend to place the LDC0851 next to the sensor to ensure best sensing accuracy. The main reason is sensor matching between sensing and reference coil, which becomes much harder if a cable is used. If you consider using remote sensing, please also note that the cable becomes part of the sensor, so it is necessary to consider the cable impedance when determining if the sensor is within the design space of the LDC0851. The calculator tool above also contains an LDC0851 design space tab.