Offset & gain error compensate

Discussion in 'General Electronics Chat' started by aamirali, Nov 2, 2013.

  1. aamirali

    Thread Starter Member

    Feb 2, 2012
    415
    1
    I am using MSP430G2553 & interfaced ADS1248 with it to measure thermocouple temperature. Second I have to measure battery voltage.

    So I have both bipolar & unipolar adc to compensate for offset & gain error. There is pdf file by maxim attached on compensating unipolar & bipolar adc.

    On page 4 a calibration method is given:

    1. First point is fine where offset is calculated by applying zero volts


    2. What does second line means to perform gain adjustment by rotating the
    curve about the negative full-scale point.

    How to do that mathematically.
     
  2. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,388
    1,605
    Gee, if only there was some sort of link to this mysterious document someone might wander by and see what you are talking about.
     
  3. aamirali

    Thread Starter Member

    Feb 2, 2012
    415
    1
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