Agilent Technologies 93000 SOC Series Training Manual page 257

Mixed-signal training

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Lesson 6 – Executing the DAC Linearity Test

The other two methods consider all the measured values and

derive the DeviceLSB from two sorts of linear regression

calculations.

For more information about the calculation of the DeviceLSB, see

the Appendix "Definition of DAC and ADC Characteristics" on

DAC Integral Non-Linearity

Integral non-linearity (INL) measures the deviation of each output

value from a calculated straight line.

The straight line can be drawn as a best-fit line or between the end

points as shown below:

Discrete Analog

Output Voltage

Digital Input code

Definition of DAC INL

The INL calculation returns 2

values, where n is the resolution of

the DAC (the number of bits). A DAC INL test checks the

maximum of these values against a given limit to determine the

pass/fail result.

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