TDA7402_07 Datasheet, PDF (30/71 Pages) STMicroelectronics – Car radio signal processor

Audioprocessor part
TDA7402
Figure 21. Application 2 using internal highpass and external stereo low pass filter
PROGRAMMING
5/0xxxxxxx
7/xxxxx1xx
10/xxxx11xx
12/1010xxxx
EXTERNAL
LOWPASS
220nF
ACINF ACOUT ACINR
SWIN
MAIN SOURCE
LEFT CHANNEL
BASS-FILTER
VOICE BAND
BANDPASS
MAIN SOURCE
RIGHT CHANNEL
SECOND SOURCE
LEFT CHANNEL
SECOND SOURCE
25K
MS MONO
50K
50K 50K
25K
LOWPASS
25K
SEC.S MONO
25K
OFF/ON FC
SPEAKER FRONT
SPEAKER REAR
SPEAKER SUBWOOFER
D00AU1157
Figure 22. Application 3 using pure external filtering (e.g. DSP)
PROGRAMMING
5/1xxxxxxx
7/xxxxx0xx
10/xxxx11xx
12/1010xxxx
EXTERNAL
FILTERING
220nF
ACINF
220nF
ACOUT
220nF
ACINR
220nF
SWIN
MAIN SOURCE
LEFT CHANNEL
BASS-FILTER
VOICE BAND
BANDPASS
MAIN SOURCE
RIGHT CHANNEL
SECOND SOURCE
LEFT CHANNEL
SECOND SOURCE
25K
MS MONO
50K
50K 50K
25K
LOWPASS
25K
SEC.S MONO
25K
OFF/ON FC
SPEAKER FRONT
SPEAKER REAR
SPEAKER SUBWOOFER
D00AU1163
4.14
Speaker attenuator and mixing
A mixing-stage is placed after each speaker attenuator and can be set independly to mixing
mode. Having a full volume for the mix signal the stage offers a wide flexibility to adapt the
mixing levels.
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