Datasheet

3−53
selection of the quadratic distribution—50% of the 16K dither output samples are of value ±1 (0.5 x 1
2
x 16,000 = 8000)
and 12.5% of the 16K dither output samples are ±2 (0.125 x 2
2
x 16,000= 8000). Figure 3−32(b) is the circular
correlation of 16K samples of dither data from CH2 and 16K samples of dither data from CH3. There are no points
of correlation is 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 3−32. Triangular Dither Statistics