DAC static performance terminology The statement “Offset is the characteristic of a DAC defined by the absence of any incorrect step reversals” is assessed against standard definitions of offset error and monotonicity.

Introduction / Context:
Digital-to-analog converters are described using static performance terms such as offset error, gain error, differential nonlinearity (DNL), integral nonlinearity (INL), and monotonicity. Accurate terminology is important for interpreting datasheets and verifying performance.

Given Data / Assumptions:

• Offset error refers to deviation of the actual transfer function from the ideal at zero code (or the first transition).
• Monotonicity means the output never decreases when the input code increases by one step; absence of step reversals defines monotonic behavior.
• DNL and INL quantify step size errors and cumulative deviation from ideal.

Concept / Approach:
The statement confuses offset and monotonicity. Offset is a vertical shift of the transfer curve; monotonicity is concerned with the direction of successive steps. A DAC can be perfectly monotonic yet have offset, and vice versa.

Step-by-Step Solution:

Verification / Alternative check:
Review any DAC datasheet glossary: offset and monotonicity are listed as distinct parameters.

Why Other Options Are Wrong:
“Correct” would propagate the definition error. The technology-specific options are irrelevant; the definitions are universal.

Common Pitfalls:
Mixing offset, gain error, and INL; assuming monotonicity implies small DNL (it does not necessarily).

Final Answer:
Incorrect