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TDA7407D Datasheet(PDF) 12 Page - STMicroelectronics

No. de pieza TDA7407D
Descripción Electrónicos  ADVANCED CAR SIGNAL PROCESSOR
PDF  34 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7407D Datasheet(HTML) 12 Page - STMicroelectronics

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TDA7407D
12/34
6
MULTIPATH DETECTOR
■ Internal 19kHz band pass filter
■ Programmable band pass and rectifier gain
■ two pin solution fully independent usable for external programming
■ selectable internal influence on Stereoblend
Table 10. Quality Detector
6.1
DESCRIPTION OF THE AUDIOPROCESSORPART
6.1.1 Input Multiplexer
■ CD quasi differential
■ Cassette stereo
■ Phone inverting
■ AM mono
■ Stereodecoder input.
6.1.2 Input stages
Most of the input stages have remained the same as in preceeding ST audioprocessors with exception of
the CD inputs (see figure 8).In the meantime there are some CD players in the market having a significant
high source impedance which affects strongly the common-mode rejection of the normal differential input
stage. The additional buffer of the CD input avoids this drawback and offers the full common-mode rejec-
Table 9. ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
fCMP
Center Frequency of Multipath-
Bandpass
stereodecoder locked on
Pilottono
19
KHz
GBPMP
Bandpass Gain
bits D2, D1 configuration byte = 00
6dB
bits D2, D1 configuration byte = 10
12
dB
bits D2, D1 configuration byte = 01
16
dB
bits D2, D1 configuration byte = 11
18
dB
GRECTMP Rectifier Gain
bits D7, D6 configuration byte = 00
7.6
dB
bits D7, D6 configuration byte = 01
4.6
dB
bits D7, D6 configuration byte = 10
0dB
bits D7, D6 configuration byte = 11
off
dB
ICHMP
Rectifier Charge Current
bit D5 configuration byte = 0
0.5
µA
bit D5 configuration byte = 1
1.0
µA
IDISMP
Rectifier Discharge Current
0.5
1
1.5
mA
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
A
Multipath Influence Factor
Addr. 12 / Bit 5+6
00
01
10
11
0.7
0.85
1.00
1.15
dB
dB
dB
dB
B
Noise Influence Factor
Addr. 16 / Bit 1+2
00
01
10
11
15
12
9
6
dB
dB
dB
dB
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