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| 型號： | TLV320DAC3100IRHBR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | DAC WITH PROGRAMMABLE PLL, PQCC32 |
| 封裝： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件頁數： | 37/97頁 |
| 文件大小： | 1134K |
| 代理商： | TLV320DAC3100IRHBR |
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SLAS671 – FEBRUARY 2010
www.ti.com
Table 5-25. Analog Volume Control for Headphone and Speaker Outputs (for D7 = 1)
Analog
Register Value
Attenuation
Register Value
Attenuation
Register Value
Attenuation
Register Value
Attenuation
(dB)
0
0.0
30
–15.0
60
–30.1
90
–45.2
1
–0.5
31
–15.5
61
–30.6
91
–45.8
2
–1.0
32
–16.0
62
–31.1
92
–46.2
3
–1.5
33
–16.5
63
–31.6
93
–46.7
4
–2.0
34
–17.0
64
–32.1
94
–47.4
5
–2.5
35
–17.5
65
–32.6
95
–47.9
6
–3.0
36
–18.1
66
–33.1
96
–48.2
7
–3.5
37
–18.6
67
–33.6
97
–48.7
8
–4.0
38
–19.1
68
–34.1
98
–49.3
9
–4.5
39
–19.6
69
–34.6
99
–50.0
10
–5.0
40
–20.1
70
–35.2
100
–50.3
11
–5.5
41
–20.6
71
–35.7
101
–51.0
12
–6.0
42
–21.1
72
–36.2
102
–51.4
13
–6.5
43
–21.6
73
–36.7
103
–51.8
14
–7.0
44
–22.1
74
–37.2
104
–52.2
15
–7.5
45
–22.6
75
–37.7
105
–52.7
16
–8.0
46
–23.1
76
–38.2
106
–53.7
17
–8.5
47
–23.6
77
–38.7
107
–54.2
18
–9.0
48
–24.1
78
–39.2
108
–55.3
19
–9.5
49
–24.6
79
–39.7
109
–56.7
20
–10.0
50
–25.1
80
–40.2
110
–58.3
21
–10.5
51
–25.6
81
–40.7
111
–60.2
22
–11.0
52
–26.1
82
–41.2
112
–62.7
23
–11.5
53
–26.6
83
–41.7
113
–64.3
24
–12.0
54
–27.1
84
–42.1
114
–66.2
25
–12.5
55
–27.6
85
–42.7
115
–68.7
26
–13.0
56
–28.1
86
–43.2
116
–72.2
27
–13.5
57
–28.6
87
–43.8
117–127
–78.3
28
–14.0
58
–29.1
88
–44.3
29
–14.5
59
–29.6
89
–44.8
5.5.11.3 Class-D Speaker Analog Output Volume Control
For the mono speaker outputs, the analog volume control has a range from 0 dB to –78 dB in 0.5-dB
steps for most of the useful range plus mute, as seen in Table 5-24 and Table 5-25. The implementation
includes soft-stepping logic.
Routing the left-channel DAC output signal to the left-channel analog volume control is done by writing to
page 1 / register 35, bit D6. Routing the right-channel DAC output signal to the right-channel analog
volume control is done by writing to page 1 / register 35, bit D2. Changing the left-channel analog volume
for the speaker is controlled by writing to page 1 / register 38, bits D6–D0. Changing the right-channel
analog volume for the speaker is controlled by writing to page 1 / register 39, bits D6–D0.
Routing the signal from the output of the left-channel analog volume control to the input of the mono
speaker amplifier is done by writing to page 1 / register 38, bit D7.
The analog volume-control soft-stepping time is based on the setting in page 0 / register 63, bits D1–D0.
42
APPLICATION INFORMATION
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TLV320DAC3100
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