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DAC5578: The Offset error and the Gain error

chentsu chung
Mastermind 6180 points
Part Number: DAC5578


Sir,

The offset error and the gain are all measure by (12-bit: 30 and 4050; 10-bit: 12 and 1012; 8-bit: 4 and 250)

For 8-bit version, what is the  Offset error and the Gain error for 0-3 and 251-255?

Thank you

C.T.

  • 0
    TI__Guru 55163 points

    Hi C.T.,

    When the DAC output is operating near the supply voltages, the error becomes non-linear so GE and OSE no longer apply.  For this reason we specify the code-set away from the rails.

    Here is a video describing this behavior, with OSE vs ZCE described at about 3:30.  You can estimate the error in the ranges outside of the specified codes by looking at the zero-code error and the full-scale error.  The DAC5578 PDS specifies those values in the electrical characteristics table.

    Please let me know if this answers your question.

    Thanks!

    Paul