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

Ryan Young

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

over 6 years ago

0 Alexander Davis over 6 years ago

TI__Expert 6250 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 Dennis Goeke over 6 years ago in reply to Alexander 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

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