參數(shù)資料
型號(hào)： TDA7719TR
廠商： STMICROELECTRONICS
元件分類： 音頻控制
英文描述： 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
封裝： ROHS COMPLIANT, MO-153AC, TSSOP-28
文件頁(yè)數(shù)： 8/46頁(yè)
文件大小： 590K
代理商： TDA7719TR
Description
TDA7719
Doc ID 13698 Rev 4
4.2
Mixing
The device provides mixing function which allows the mixing source mixed into front and
rear speaker output independently. The mixing source can be any single-ended input,
mono-differential input or beep input (Mono single-ended input when DC offset detector is
not used). In order to adjust the level of mixing signal, the mixing selector is followed with a
0 dB~-31 dB attenuator. The maximum mixing input signal level is 1.6 Vrms for single-ended
input and mono-differential input. For beep input, the maximum input signal level is about
1.4 Vrms. The block diagram of the mixing function is shown below.
Figure 4.
Block diagram of mixing stage
Since the input stage of this device has different configurations, the corresponding sources
for mixing selector are also different according to the configurations. The following table
defines the available sources for mixing under different configurations.
Note:
Only light grey cells are allowed mixing input. The dark grey cells are not allowed.
The beep input is available only when DC offset detector function is not used.
Table 8.
Available sources for mixing
Mix selector bits
(Byte2 Bit2~Bit0)
000
001
010
011
100
101
110
111
MixIN0
MixIN1
MixIN2
MixIN3
MixIN4
MixIN5
MixIN6
MixIN7
CFG0
NA
Beep
Mute
CFG1
SE1
SE2
SE3
NA
Beep
Mute
CFG2
SE1
SE2
SE3
SE4
SE5
NA
Beep
Mute
CFG3
SE1
SE2
SE3
MD1
NA
MD2
Beep
Mute
CFG4
NA
Beep
Mute
CFG5
NA
SE4
SE5
NA
Beep
Mute
CFG6
MD3
SE2
SE3
NA
Beep
Mute
CFG7
SE1
SE2
SE3
NA
Beep
Mute
Mix ing
Selector
SE Inputs
MD Inputs
Beep
0~-31dB
Speaker
Attenuator
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