Datasheet
TLV320AIC3120
www.ti.com
SLAS653A –FEBRUARY 2010–REVISED MAY 2012
Table 5-33. Analog Volume Control for Headphone and Speaker Outputs (for D7 = 1)
(1)
Register Value Analog Gain Register Value Analog Gain Register Value Analog Gain Register Value Analog Gain
D6–D0 (dB) D6–D0 (dB) D6–D0 (dB) D6–D0 (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
(1) Mute when D7 = 0 and D6–D0 = 127 (0x7F).
5.6.9.3 Class-D Speaker Analog Output Volume Control
For the 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 and Table 5-33. The implementation includes soft-stepping
logic.
Routing the DAC output signal to the analog volume control is done by writing to page 1 / register 35, bits
D7–D6. Changing the analog volume for the speaker is controlled by writing to page 1 / register 38, bits
D6–D0.
Routing the signal from the output of the analog volume control to the input of the 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.
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