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PGA308: Why PGA308 OTP registers become garbled automatically?

Part Number: PGA308

Customer's schematic is as bellow:

But the OTP registers become garbled  automatically, and 4 of the 30 sensors  occurs this problem. Detailed information are as bellow.

Thank you and happy new year!

Best regards, 

Marc

  • Hi Marc,
    It's difficult to tell without additional information. It's possible that noise is coupling into the one wire line, which is then interpreted as valid communication by the PGA308. If this is the case, adding a pulldown on the one wire line could help.