Linear Sensor with LDC1000?

Hello Patrick,

The target shape will be similar to the shape shown in Fig. 22 in DS.

Dimensions of the coil and the target depend on the required resolution over 50mm stroke 5mm away.

We are working on the detailed apps note on this, explaining in details how to implement this approach.

Hallo,

i saw the contoure Fig.22 , it is a complex shape. I need a linear Output and repeatability of 0,5% over 50mm.

If i use a 14mm diameter (like LDC EVAL Board, how can I calculate the contour?

Rg Patrick

Hello Patrick,

You will need to use a FEMM tool like ADS or HFSS to calculate the impedance and inductance of coil-target system for a given shape. Then, based on the results of the sim, the shape is adjusted, and sim is run again.

In 2-3 iterations the response will become linear, and you will have the shape.

Eventually we plan on having these sims run internally, so you could have direct answer, but we are not there yet.

Hello,

unfortunately we do not have such tools, it will be very helpful for all designer building a linear solution adding this feature to your TI Simulation tools

Regards Patrick