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SLOS407D − FEBRUARY 2003 − REVISED AUGUST 2004
INPUT RESISTANCE
COMMON-MODE REJECTION RATIO
vs
GAIN
vs
FREQUENCY
160
140
120
100
−40
V
= 12 V,
CC
VAROUT
R
= 8 Ω,
L
C
= 1 µF,
−50
−60
−70
−80
2p5
Class-D
80
60
40
−90
20
0
−100
−50
−30
−10
10
30
10
100
1 k
10 k
100 k
Gain − dB
f − Frequency − Hz
Figure 25
Figure 26
NOISE
vs
FREQUENCY
CLOSED LOOP RESPONSE
Gain
0
12.853
9.318
175
150
125
100
75
V
= 12 V,
−20
CC
Gain= +20 dB,
R = 8 Ω
L
−40
−60
5.784
2.249
Inputs AC Coupled to GND,
VAROUT,
No Filter
50
25
0
−80
−1.285
−4.82
Phase
−100
−120
−140
−160
−180
−200
−25
−50
−8.354
−11.889
−15.424
−18.958
−22.493
−75
V
= 12 V,
CC
Gain= +7.9 dB,
= 8 Ω
−100
−125
−150
−175
R
L
VAROUT
10
100
1 k
10 k
20
100
1 k
10 k
f − Frequency − Hz
f − Frequency − Hz
Figure 28
Figure 27
17
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