TDA7402_07 STMICROELECTRONICS [STMicroelectronics], TDA7402_07 Datasheet - Page 17

• Manufacturer Part Number: TDA7402_07
• Description: Car radio signal processor
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

TDA7402
4
4.1
4.1.1
4.1.2
Audioprocessor part
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.
Full-differential stereo Input 1 (FD1)
The FD1 input is implemented as a buffered full-differential stereo stage with 100kΩ 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).
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.
STEREO
STEREO
STEREO
MONO
MONO
MONO
MD1G
MD2G
SE4R
FD1+
FD2+
FD1-
FD2-
MD1
MD2
MPX
SE2
SE3
SE4
SE1
AM
Input-stages
100K
100K
100K
100K
100K
100K
100K
100K
100K
100K
100K
28K
28K
28K
28K
1
1
1
1
STEREO DECODER
NOISE BLANKER
15K
15K
15K
15K
+
15K
15K
15K
15K
28K
28K
28K
28K
+
+
+
+
-
-
-
-
SE4R
MD1/SE4
MD1/SE4
FD1/SE2
FD1/SE2
D00AU1142
BEEP
SE3
MD2
MD2
MD1
MD2
FD2
SE1
SE3
FD2
SE1
AM
FM
FM
AM
FM
SECOND SOURCE
MAIN SOURCE
SELECTOR
SELECTOR
SELECTOR
MIXING
MUTE
MUTE
MUTE
Audioprocessor part
100K
MIXING STAGE
IN GAIN
IN GAIN
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