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TDA7402 Datasheet(PDF) 17 Page - STMicroelectronics

Part # TDA7402
Description  Car radio signal processor
PDF  71 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7402 Datasheet(HTML) 17 Page - STMicroelectronics

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TDA7402
Audioprocessor part
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4
Audioprocessor part
4.1
Input stages
In the basic configuration two full differential, two mono differential, one single ended stereo
and one single ended mono input are available. In addition a dedicated input for the stereo
decoder MPX signal is present.
Figure 3.
Input-stages
4.1.1
Full-differential stereo Input 1 (FD1)
The FD1 input is implemented as a buffered full-differential stereo stage with 100k
Ω input
impedance at each input. The attenuation is programmable in 3 steps from 0 to -12dB in
order to adapt the incoming signal level. A 6dB attenuation is included in the differential
stage, the additional 6dB are done by a following resistive divider. This input is also
configurable as two single ended stereo inputs (see pin-out).
4.1.2
Full-differential stereo Input 2 (FD2)
The FD2 input has the same general structure as FD1, but with a programmable attenuation
of 0 or 6dB embedded in the differential stage.
100K
15K
15K
15K
15K
1
100K
100K
1
-
+
100K
28K
28K
28K
28K
SE4R
100K
-
+
100K
15K
15K
15K
15K
1
100K
1
-
+
100K
28K
28K
28K
28K
100K
100K
100K
-
+
SE2
SE3
FD1-
FD1+
STEREO
FD2-
FD2+
STEREO
SE4
SE4R
SE1
STEREO
AM
MONO
MPX
MD1G
MD1
MONO
IN GAIN
IN GAIN
MUTE
MUTE
MUTE
MIXING STAGE
SECOND SOURCE
SELECTOR
MIXING
SELECTOR
MAIN SOURCE
SELECTOR
SE3
BEEP
FM
MD1
MD2
FD1/SE2
FD2
MD1/SE4
MD2
SE1
AM
FM
SE3
FD1/SE2
FD2
MD1/SE4
MD2
SE1
AM
FM
MD2G
MD2
MONO
100K
NOISE BLANKER
+
STEREO DECODER
D00AU1142



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