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DAC Offset Error and Gain Error

Victoria Qin
Intellectual 2840 points


Hi Team,

Good day!

I’m Victoria and learning DAC products. I have a question about this precision labs video about DAC calibration. I have tried to find the presenter guy, but I was not able find him. Could you please kindly make it clear?

Digital-to-analog converters (DACs) | TI.com 

Here are 2 screenshots about the presentation. It seems not same between them about the definition of Gain Error and Offset Error.  It’s a little bit confusing and I would like to know which one is correct. Thanks in advance.

Regards,

Victoria

  • 0
    TI__Mastermind 42273 points

    Hi Victoria, 

    I think the second screenshot (the one with the equations) is a more accurate representation of the offset and gain errors. The DAC transfer function is a line which can be represented by the equation y = mx + b. Offset error is the error in the 'b' term of the equation, and the gain error is the error in the 'm' term or slope of the equation. 

    Best,

    Katlynne Jones