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TDA7412 Datasheet(PDF) 11 Page - STMicroelectronics

Part # TDA7412
Description  CARRADIO SIGNAL PROCESSOR
PDF  56 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7412 Datasheet(HTML) 11 Page - STMicroelectronics

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TDA7412
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
1.0 DESCRIPTION OF THE AUDIOPROCESSOR PART
1.1 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 stereodecoder MPX-signal is present.
Figure 1. Input-stages
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 divid-
er. 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 em-
bedded in the differential stage.



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