• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 46 subscribers
  • Views 94 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADS1248: 125 deg C operation

Aleksandr Korniyenko
Prodigy 80 points
Part Number: ADS1248
Other Parts Discussed in Thread: ADS124S08

Hi,

I want to use ADS1248 converter for my thermocouple input.  the problem is that I need to use it at the highest specified temperature of 125C.  However data sheet is showing parameter limits at 105 deg C.  Is there another datasheet that shows 125 deg C operation?  Or is anyone used it at 125 deg C and noticed accuracy issues?

Thank you

  • 0
    TI__Mastermind 34901 points

    Hi Aleksandr,

    Per Table 7.3 in the ADC datasheet, the ADS1248 can operate up to 125C, though the specifications only hold up to 105C. This means the device will operate but not necessarily offer datasheet performance for temperatures >105C.

    Will the ADC be subjected to 125C, or do you just need to measure up to 125C using the thermocouple? Typically the thermocouple is in a remote location that is much hotter than the actual board temperature.

    -Bryan

  • 0
    Prodigy 80 points

    ADS1248 will have to operate at the temperatures above 105 deg C.  About 120 degC.

  • 0 in reply to Aleksandr Korniyenko
    TI__Mastermind 34901 points

    Hi Aleksandr,

    Thanks, then the information in my first post applies.

    I can point you to the next-generation version of the ADS1248, which is the ADS124S08. This part has more features, more channels, faster data rates, lower power, lower noise, comes in a small package, and is approximately the same cost.

    The ADS124S08 is specified up to 125C, so you can rely on the datasheet specifications to understand how the performance behaves at these elevated temperatures.

    Let me know if this will work for your design.

    -Bryan