Abstract
The problem of the signal acquisition with high resolution and linearity for static and dynamic characterization of high resolution DACs is shifted into the problem of high speed signal acquisition at lower resolution. High speed low resolution ADC is used to over sample the signal sum of output voltage of the DAC under test and periodic reference voltage. Two different reference signals are used: sinusoidal for static test, and sawtooth for dynamic test. DAC output is reconstructed by means of the reference signal evaluated in the zero crossing sequence detected on the resulting signal. Because the reconstructed signal is non-uniformly time sampled, the spectral analysis is performed by adapting the procedure pointed out to reconstruct the uniformly sampled spectrum from the non-uniformly sampled one. Numerical tests confirm the advantages in term of higher accuracy in comparison with others methods.
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