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DAC8803 / tolerance of internal resistor

ACGUY
Guru 11170 points

Hi all,

Please let me know about tolerance of internal resistor.
I finded the 5-kohm +/-20% tolerance of internal resistor from datasheet.

I have a question.
This tolerance to apply for each channels? Or internal resistores are same value and  include the tolerance?

Regards,
Nagai

  • 0
    TI__Genius 11750 points

    Howdy Nagi,

    Typically, the internal resistance (R) and (Rfb) are electrically trimmed to have excellent matching, which is primarily responsible for the end DAC transfer function.  By the end of trimming (the values of R, Rfb) are guaranteed to be within the range specified in the datasheet (4-6kohm).  This process is repeated on the remaining channels, and are specified in datasheet to be within 1% of each other's trimmed value.

    Please let me know if this answers your question.

    Best Regards,

    Matt