• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 46 subscribers
  • Views 216 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.

ADS1251: Long term stability

Hirokazu Takahashi
Expert 8420 points
Part Number: ADS1251
Other Parts Discussed in Thread: REF70

Hello Support team,

Could you let me know the value of Long term stability for ADS1251?

Best Regards,

Hirokazu Takahashi

  • 0
    TI__Mastermind 37211 points

    Hi Takahashi-san,

    Can you please explain what you mean by "long term stability"?

    I will say that the datasheet is fairly limited in the specifications for the ADS1251, so I doubt there will be characterization data available for what you are asking. But I can check if you can let me know what specifically you need.

    -Bryan

  • 0 in reply to Bryan Lizon86
    TI__Expert 8420 points

    Hello Bryan-san

    Thanks for your reply soon.
    For example, we can find the description regarding "long term stability" at voltage reference like REF70.
    Does gain or offset error at AD1251 need to take into account the variation over time?
    It is similar as temp drift. Are there any characteristics will be changed during long term life?
    The market at this opportunity is Test & Measurement.
    Such a market has the requirement to keep the stability for performance.

    Best Regards,
    Hirokazu Takahashi

  • 0 in reply to Hirokazu Takahashi
    TI__Mastermind 37211 points

    Hi Takahashi-san,

    Unfortunately the long-term stability specification for a reference is a very specific term related to the reference's output voltage stability over time. The ADS1251 has many specifications that would need to be measured for a similar "long-term stability" type of parameter, and therefore we do not have such a specification for this ADC.

    Gain and offset error will likely drift over time, though we do not have any data on how much these parameters will change. The best solution to eliminate these errors would be to perform periodic calibration of the ADC. Performing a periodic offset and gain calibration has the added benefit of removing the temperature drift as well.

    -Bryan