FAB2200 Datasheet, PDF (30/33 Pages) Fairchild Semiconductor – Audio Subsystem with Stereo Class-G Headphone Amplifier and 1.2W Mono Class-D Speaker Amplifier

Table 20. Class-D Spread-Spectrum Modulation Trim
SSMT [2:0]
Class-D Spread-Spectrum Modulation Trim (±%)
000
5.3
001
7.0
010
10.6
011
21.2
100
0.0
101
3.0
110
3.6
111
4.2
MCSSMT [5:3]
Sets the spread-spectrum modulation of the master clock. See Table 21 for amount of modulation. Modulating the
master clock does not modulate the class-D output frequency because the triangle wave generator is PLL controlled.
Table 21.
Master Clock Spread-Spectrum Modulation Trim
MCSSMT [2:0]
Master Clock Spread-Spectrum
Modulation Trim (± %)
000
5.3
001
7.0
010
10.6
011
21.2
100
0.0
101
3.0
110
3.6
111
4.2
© 2009 Fairchild Semiconductor Corporation
FAB2200 • Rev. 1.0.1
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