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PGA308EVM: 3-wire calibration; one-wire and output config

Ryan Young
Prodigy 10 points
Part Number: PGA308EVM

Hi,

I have JMP7 set to "Vout to One" and JMP1 set to "1W to Vout" and have checked off the "OWD" and "One wire connected to Vout" in the one-wire and output config options, but I still get the "ONE Wire Time Out" error and the "OWD" box keeps automatically un-checking itself after it attempts communication. I have tried using JUMP8 on the USB DAQ Platform in "SPD" and "GND".

I have tried reinstalling the PGA308EVM software but nothing has changed. I have no problem calibrating in 4-wire mode, but need 3-wire for my sensor calibration.

Thanks,

Ryan

  • 0
    TI__Expert 7500 points

    Hi Ryan,

    I was able to reproduce this behavior on a PGA308EVM. The issue I found was that if the Dout/Clamp pin was configured as a clamp, one wire communication wasn't possible. Configuring this as Dout allowed the EVM to communicate again.

  • 0 in reply to Alex Davis
    TI__Genius 11135 points
    Hi Ryan

    We haven't heard back from you so we assume this resolved your issue. If not, post below, or start another thread if this on has timed-out.

    Thanks
    Dennis