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DAC80502: The error difference between REF5050 and internal REF

Takumi Suzuki1
Mastermind 8610 points
Part Number: DAC80502


Tool/software:

Hi

Let me ask you a question about the DAC output error difference between REF5050(5V, 0.05%) and internal REF(2.5V, 0.1%).

Though I am considering to calculate the each error, I do not understand how to evaluate/calculate the error.

Will you tell me the each error difference in case of using REF5050 and internal REF?

I understand REF5050 is better performance but I would like to know the difference value with the internal REF.

Thank you for your support.

Best Regards,

Takumi

  • +1
    TI__Mastermind 42273 points

    Hi Takumi,

    The error directly translates to DAC error. If the reference is 0.05% off, the DAC output will be 0.05% off. If the reference is 0.1% off, the DAC output will be 0.1% off. The different value does not have much of an effect. 

    If you use the 5V reference, you will need to use the internal reference divider and then the internal buffer gain to get a 5V output. 

    If you use the 2.5V reference, you will need to use the internal buffer gain to get a 5V output. 

    Both references will functionally behave the same if you configure the internal settings as I've mentioned above. 

    Best,

    Katlynne Jones

  • 0 in reply to Katlynne Jones
    Mastermind 8610 points

    Katlynne-san,

    Thank you for your reply !

    I understood.

    Best Regards,

    Takumi