The LDC1000 connection to sensor with "Wire to Board Connector"

Edgard

Intellectual 610 points

Dear TI FAE,

I have a question. I wonder whether it is possible to use "Wire to Board Connector" or not.

The sensor is not PCB coil, but a discrete component. And it is NOT possible to mount it on the PCB.

It is necessary to use wire cable, like shielded or coaxial.

So, I'm trying to use "Wire to Board Connector". But I'm affraid that the impedance would be changed

due to the connector .

Have you ever heard the application examples such like this?

In my system, the sensor frequency or LDC1000 is about 40kHz.

It is similar to auditory bandwidth...

Kindest Regards,

Edgard

over 9 years ago

0 Chris Oberhauser66 over 9 years ago

TI__Genius 14270 points

Hello Edgard,

You can connect a coil to the LDC1000 via a cable. We recommend using twisted pair (or at least twisting the wires every 1cm or so). The capacitor should be placed next to the actual inductor if possible (i.e. at the end of the cable, physically close to the windings) for best performance. A sensor frequency of 40kHz is fine.

0 Edgard over 9 years ago in reply to Chris Oberhauser66

Intellectual 610 points

Dear TI Engineer Chris Oberhauser,

thanks for your reply! I'm trying to do what you explained.

Kindest Regards,

Edgard

0 Chris Oberhauser66 over 9 years ago in reply to Edgard

TI__Genius 14270 points

Please keep us updated on your status.

Regards,

ChrisO

0 Edgard over 9 years ago in reply to Chris Oberhauser66

Intellectual 610 points

Dear Chris,

thanks. Just now I evaluated a twisted pair cable between a sensor and LDC1000.

I could get the performance I expected.

Now I'm checking the connectivity for Connector like Molex.

I'm afraid that the Rp would be changed.

Kindest Regards,

Edgard

0 Chris Oberhauser66 over 9 years ago in reply to Edgard

TI__Genius 14270 points

Hello Edgard,

Please clarify the Rp item: have you observed a shift in Rp?

Regards,

ChrisO

Sensors

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The LDC1000 connection to sensor with "Wire to Board Connector"