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Temp Sensor suggestion for DM8148.

vengadesh uthirapathy
Intellectual 770 points
Other Parts Discussed in Thread: TMP441

Hi ,

One of my customer is developing the Thin client application based on DM8148 Processor , now customer want to measure the DM8148 (CPU temperature range +20 o C to 100 oC)Temperature & over all PCB board  temperature(System temperature range +20 o C to 100 o C ) .Accuracy:- ±  1 with all interface.   The DM814X has in built  Temp sensor ? Could please suggest the suitable product from TI / NSC.  can we monitor the both temp in BIOS Stet up ?

Rgds/

vengat

 

  • 0
    TI__Mastermind 27715 points

    Hello Vengadesh,

    I'm not familiar with the DaVinci processors, but I just searched through all the DM8148 technical documents and wasn't able to find any mention of a built-in temperature sensing function. Even so, there's most likely an internal diode that can be used for a remote temperature measurement. I would ask the DaVinci experts on the appropriate forum at: http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716.aspx for a confirmation of this.

    That being said, I'd recommend a device such as the TMP441 for the temperature measurement you have described. This part can remotely measure the processor temperature with ±1°C accuracy across the 0° to 100°C range, and can also locally measure the system temperature with ±1°C accuracy across the 0° to 100°C range.

    Again, I'm not a DaVinci expert, but since there's no mention of temperature sensing functionality in the DM8148 documentation it's unlikely that the temperatures can be monitored in the BIOS.

    Best regards,

    Ian Williams
    Linear Applications Engineer
    Precision Linear and Sensing Products 

  • 0 in reply to Ian Williams
    Intellectual 770 points

    Hi Ian,

    Thanks for your valuable info.

    Regards/

    vengat