TMCS1108-Q1: Max detection distance

Hello Bengi,

The TMCS1108-Q1 is made for current sensing, not position sensing, so one of our magnetic current sensing parts may be a better fit for this application:

https://www.ti.com/sensors/magnetic-sensors/multi-axis-linear-angle-position-sensors/products.html#

https://www.ti.com/sensors/magnetic-sensors/hall-effect-latches-switches/products.html

https://www.ti.com/sensors/magnetic-sensors/linear-hall-effect-sensors/products.html

TI also has a magnetic sensing simulator that is useful for answering questions of distance for these products: https://www.ti.com/tool/TI-MAGNETIC-SENSE-SIMULATOR

Note that the distances will depend on the type and strength of magnets used.

The TMCS1108-Q1 will have a fixed sensitivity to external magnetic fields, but the "detection distance" will depend on the magnetic field strength. For the TMCS1108, the sensitivity can be calculated as S/G, or the part sensitivity divided by the magnetic coupling factor (G = 1.1 mT/A for the TMCS1108). The sensitivities, S, are listed in the electrical characteristics in the datasheet:

If you have any further questions about position sensing, I would recommend that you link the question to a part from the links I have included above so that they are handled by the appropriate team. I am happy to continue answering questions regarding the TMCS1108.

Levi DeVries