TDA7719 STMicroelectronics, TDA7719 Datasheet - Page 16

• Manufacturer Part Number: TDA7719
• Description: IC AUDIO PROCESSOR CAR 28-TSSOP
• Manufacturer: STMicroelectronics
• Type: Audio Processorr
• Series: -r

Specifications of TDA7719

• Applications: Radio
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Description
4.2
Note:
16/46
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.
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.
Table 8.
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.
(Byte2 Bit2~Bit0)
Mix selector bits
CFG0
CFG1
CFG2
CFG3
CFG4
CFG5
CFG6
CFG7
MD Inputs
SE Inputs
Block diagram of mixing stage
Available sources for mixing
Beep
NA
SE1
SE1
SE1
NA
NA
MD3
SE1
MixIN0
000
MixIN1
Selector
Mix ing
SE2
SE2
SE2
SE2
SE2
001
NA
NA
NA
Doc ID 13698 Rev 4
MixIN2
SE3
SE3
SE3
SE3
SE3
010
NA
NA
NA
0~-31dB
MixIN3
MD1
SE4
SE4
011
NA
NA
NA
NA
NA
Attenuator
MixIN4
Speaker
SE5
SE5
100
NA
NA
NA
NA
NA
NA
MixIN5
MD2
101
NA
NA
NA
NA
NA
NA
NA
MixIN6
Beep
Beep
Beep
Beep
Beep
Beep
Beep
Beep
110
TDA7719
MixIN7
Mute
Mute
Mute
Mute
Mute
Mute
Mute
Mute
111