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LMP91200EVAL/NOPB operating temperature

What is the maximum operating temperature range of the LMP91200EVAL/NOPB eval kit?  I need to simulate some issues we are seeing on our design at 0deg C and plan to put this eval kit in a chamber at 0 deg Celsius and would like to know beforehand if the eval board will function at that temperature.  I know the chip will but could not find any operating temp range info on the development kit itself.

Thanks

Kirk

  • Hello Kirk,

    The Eval board was not really designed to go over temperature and does not have a specific rating. But I do not see any devices that would be adversely affected by the 0°C temperature. It is built from commercially available parts on standard FR4 board.

    My biggest concern would be the crystal, but it is rated -40 to 85°C. The eval board should be fine over the -40 to 85°C temperature range, as determined by the lowest temp spec part (the crystal and tantalum caps). Note that the plastic parts could distort with extended exposure to high temperature.

    The SPIO4 board shown is probably a narrower temp range due to the USB cables, so I would say 0 to 50°C. I assume you will be driving the eval board with your own circuit through leads into the chamber.

    My caution would be to watch for condensation around the input pins. Ramp hot first and use clean dry air. If you do not have clean-dry air, place some desiccant packs in the chamber. Or, in a pinch, a handful of dry rice in cheesecloth.

    Note that airflow inside a chamber can cause charge accumulation and interfere with high-impedance measurements. You may need to enclose the board in a simple (metallic) box to prevent airflow across the input section.

    Regards,
    Paul Grohe