參數(shù)資料
型號： TAS5715PHPR
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 41.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48
封裝： 7 X 7 MM, GREEN, PLASTIC, HTQFP-48
文件頁數(shù)： 51/74頁
文件大?。?/td> 2771K
代理商： TAS5715PHPR
www.ti.com
SLOS645 – AUGUST 2010
VOLUME REGISTERS (0x07, 0x08, 0x09, 0x0C)
Step size is 0.5 dB.
Master volume
– 0x07 (default is mute)
Channel-1 volume
– 0x08 (default is 0 dB)
Channel-2 volume
– 0x09 (default is 0 dB)
Headphone volume
– 0x0C (default is 0 dB)
Volume in the TAS5715 is not intended for dynamic changes. Channel volumes are set during initialization.
Master volume is written with a value 0xFF to MUTE and with a value of 0x30 to UNMUTE during normal mode.
When DRC functionality is used, the maximum allowed volume (sum of channel and master volume ) is 15.5 dB.
When DRC is enabled, a MUTE command does not completely mute the system. The actual mute level depends
on the volume settings and modulation index.
FINE VOLUME SETTING:
TAS5715 has input mixers (0x73 , 0x77) that can be fine-tuned with a 3.23 format number to achieve the fine
volume setting.
To achieve 12.125 db of master volume, set the mixer to 0.125 db and set 0x07 (maser volume) to 12 db. The
advantage is 0x73 and 0x77 can be set to a much finer setting using 3.23 format numbers, providing the
flexibility to adjust output power precisely.
Table 11. Volume Registers (0x07, 0x08, 0x09, 0x0C)
D
FUNCTION
7
6
5
4
3
2
1
0
0
24 dB
0
1
0
0 dB (default for individual channel volume) (1)
1
0
–103 dB
1
Soft mute
(1)
Default values are in bold.
Table 12. Master Volume Table
HEX
dB
HEX
dB
HEX
dB
HEX
dB
HEX
dB
HEX
dB
00
24
30
0
60
–24
90
–48
C0
–72
F0
–96
01
23.5
31
–0.5
61
–24.5
91
–48.5
C1
–72.5
F1
–96.5
02
23
32
–1
62
–25
92
–49
C2
–73
F2
–97
03
22.5
33
–1.5
63
–25.5
93
–49.5
C3
–73.5
F3
–97.5
04
22
34
–2
64
–26
94
–50
C4
–74
F4
–98
05
21.5
35
–2.5
65
–26.5
95
–50.5
C5
–74.5
F5
–98.5
06
21
36
–3
66
–27
96
–51
C6
–75
F6
–99
07
20.5
37
–3.5
67
–27.5
97
–51.5
C7
–75.5
F7
–99.5
08
20
38
–4
68
–28
98
–52
C8
–76
F8
–100
09
19.5
39
–4.5
69
–28.5
99
–52.5
C9
–76.5
F8
0A
19
3A
–5
6A
–29
9A
–53
CA
–77
FA
0B
18.5
3B
–5.5
6B
–29.5
9B
–53.5
CB
–77.5
FB
0C
18
3C
–6
6C
–30
9C
–54
CC
–78
FC
0D
17.5
3D
–6.5
6D
–30.5
9D
–54.5
CD
–78.5
FD
0E
17
3E
–7
6E
–31
9E
–55
CE
–79
FE
0F
16.5
3F
–7.5
6F
–31.5
9F
–55.5
CF
–79.5
FF
10
16
40
–8
70
–32
A0
–56
D0
–80
Copyright 2010, Texas Instruments Incorporated
55
Product Folder Link(s): TAS5715
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