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ISO3082: When ISO3082 runs at -40℃, garbled characters will appear

Part Number: ISO3082

Hi

I use ISO3082 as the RS485 transceiver and communicate with the computer through the USB to RS485 module. The ISO3082 sends data at a baud rate of 115200, and the computer receives it. When running at -40℃, the computer side receives garbled data.
The transmission and reception control of ISO3082 is realized by an RC circuit and a NAND gate, as shown in the figure below
Please help analyze the cause of garbled characters
  • Hi,

    The device ISO3082 has been characterized and rated for -40C and hence, we do not expect any issue in device operation at this temperature. Could you please share more information related to the issue?

    1. May I know if the ISO3082 and its associated circuit the only circuit under that is subjected to -40C or if the USB to RS-485 module was also subjected to -40C?
    2. Did you check if the issue is not coming from the USB to RS-485 module? Could you please elaborate on how did you isolate the problem to ISO3082?
    3. Please do share the screenshots of ISO3082 input and output waveform to see the kind of mismatch between input and output.

    Regards,
    Koteshwar Rao

  • user4030839,

    Do you have any answers to Koteshwar's questions? We have to know if the root cause is actually the RS-485 device and not something else in the system.

    Respectfully,

    Lucas

  • user4030839,

    I'm closing the thread but feel free to start a new one if you still have questions.

    Respectfully,

    Lucas