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LDC1000 EVM does't work

Kuramochi Tadahiko
Guru 28715 points
Other Parts Discussed in Thread: LDC1612, LDC1312, LDC1101

Hi,

My customer bought 4 LDC1000 EVMs.

But two in four EVMs doesn't work, the inductance is showed "infinity".

I attached the GUI image.

EVMs which don't work is mentioned "Molex 13293", and EVMs which work is mentioned "Molex13012".

Is there any way solving this problem?

Regards,

Kuramochi

  • 0
    TI__Genius 14270 points
    Hello Kuramochi,

    It is possible there is an older firmware on 2 of the EVMs. Are you able to make Rp measurements on all of the LDC1000?

    Also, I am starting to recommend use of the LDC1312/4 or the LDC1612/4; these devices are newer generation, operate at 3.3V, and have multiple channels. You may also consider the LDC1101, which is a faster, better tolerance, 1.8V enhanced version of the LDC1000.

    Regards,

    ChrisO
  • 0 in reply to Chris Oberhauser66
    Guru 28715 points

    Hello Chris-san,

    Thank you for your support.

    I can't make Rp measurement on all EVMs.

    And I updated the firmware to "LDC1000 Firmware 0x300.txt".
    However the result isn't changed.
    (the inductance is showed "infinity")
    Is this updated file correct?

    Thanks,
    Kuramochi

  • 0 in reply to Kuramochi Tadahiko
    TI__Expert 4720 points

    Hi Kuramochi,

    If you change the graph to the raw data it should not read infinity, The inductance value is calculated on the PC using the device settings which suggests a setting may not be correct. Please go to the configuration page in the GUI and make sure there aren't any invalid settings. If you see any red boxes, enter a valid value and make sure that the Rp min and max values are also set. 

    Best regards,

    Blair