Datasheet

3−54
selection of the quadratic distribution—50% of the 16K dither output samples are of value ±1 (0.5 × 1
2
×16,000 = 8000)
and 12.5% of the 16K dither output samples are ±2 (0.125 × 2
2
× 16,000 = 8000). Figure 3−34(b) is the circular
correlation of 16K samples of dither data from CH2 and 16K samples of dither data from CH3. No points of correlation
are in this plot, verifying that the two data streams are uncorrelated. The random noise terms are approximately ±300
counts in value, as the dither data pattern was inserted at the LSB+1 bit of the output word instead of the LSB bit,
as was the case for triangular dither.
(a) Auto-Correlation Plot − CH1
(b) Correlation Plot − CH2 and CH3
Figure 3−34. Triangular Dither Statistics, Case 2