Datasheet

3−52
0.0625
0.25
0.375
−2W
Output
0.25
0.5
Output
−W
Triangular Distribution
Quadratic Distribution
16
Bit
Sample
32
Bit
Sample
24
Bit
Sample
20
Bit
Sample
18
Bit
Sample
8-Bit
Headroom
47
40
39
28
27
24
22
20
16
8
0
8-Bit
Resolution
Band
16-Bit
Output SAP
Word Size
32-Bit
Output SAP
Word Size
48-Bit DAP
Data Word
0W
−W 0 W 2W
ρ
ρ
Figure 3−32. Dither Data Magnitude (Gain = 1)
3.9.4 Dither Statistics
Figure 3−33 presents plots of the autocorrelation and channel-to-channel correlation properties of the dither data
stream when configured as triangular distributed noise. Figure 3−33(a) is the circular autocorrelation of 16K samples
of dither data collected from the TAS3103A. The audio signal level was set to zero, and the dither data stream was
inserted at the LSB of the output word. The autocorrelation contains a single line of value 8000, at the point of
correlation, and random noise terms of approximately ±150 counts in value. The value 8000 agrees with the selection
of the triangular distribution—50% of the 16K dither output samples are of value ±1. Figure 3−33(b) is the circular
correlation of 16K samples of dither data from CH1 and 16K samples of dither data from CH2. No points of correlation
are in this plot, verifying that the two data streams are uncorrelated. The random noise terms are again approximately
±150 counts in value.