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LDC1612EVM: Port Detection in 4 banana jack

RAMAKRISHNA NAGARAJU GUDLA
Prodigy 155 points
Part Number: LDC1612EVM

Hello Team,

Greetings!!!

I have been testing the evaluation board with Coil E sensor for detecting the plug insertion into the standard 4 mm banana jack ( Digikey part number J155-ND).

The approximate distance between the banana jack outer surface and sensor coil top surface 2-3 mm.

I am not quite sure how to converge with the design with inductive sensing.

Can some one guide me in this regards?

Attached the file for more details

Thanks in advance.

LDC1612EVM_Plastic_Fixture_30Nov2018.pptx

Thanks and Regards

G R K Nagaraju

  • 0
    TI__Expert 6625 points
    Hi Ramakrishna,
    We've got your request. We will get back to you as soon as possible.

    Best Regards,
    Bala Ravi
  • 0 in reply to Bala Ravi
    Prodigy 155 points

    Hello Bala  Ravi / Team,

    Thanks for your reply.

    We are open for all the possible options.

    So please do not hesitate to share your share thoughts.

    Wishing you very Happy and Prosperous New Year.

    Thanks and Regards

    G R K Nagaraju

  • 0 in reply to RAMAKRISHNA NAGARAJU GUDLA
    TI__Expert 6625 points
    Hi GRK,
    Unless you have a large sensor, detecting a banana plug at 1 inch distance is not going to have a high SNR. The sensor should be larger than 2x the target to generate a strong inductive coupling with the target. There shouldn't be much difference in inductance between with and without jack. The reason you're seeing a flatter response with jack is because there are fewer significant figures compared to without jack response in your presentation.

    Best Regards,
    Bala Ravi

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