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ISO1050: ISO1050 schematic review: CAN_RX from DSP oscillated.

Racheal Shen
Prodigy 121 points
Part Number: ISO1050

Tool/software:

Hi,

My customer has encountered an issue with ISO1050. He probed the pin pointed by blue arrow shown below. The screenshot shows there was an oscillation when CAN-RX voltage raised. Can you help with the schematic review? Is there a fault circuit design leading to an oscillation?

All the pull-up resistors to 3.3V in the schematic are 10kohm.

  • 0
    TI__Mastermind 29375 points

    Hello Rachael, 

    Thank you for reaching out. The schematic looks okay, and I don't expect issues from the information provided here. Could ask the customer to provide a full schematic of the ISO1050 with its connection to the DSP and a scope capture with RXD, TXD, CANH and CANL in the same picture?

    Best,
    Andrew