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TDA7703 датащи(PDF) 27 Page - STMicroelectronics

номер детали TDA7703
подробное описание детали  Highly integrated tuner for AM/FM car radio
PDF  32 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7703 датащи(HTML) 27 Page - STMicroelectronics

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TDA7703
Weak signal processing
Rev 1
27/32
5.1.6
Stereo decoder
5.2
AM IF-processing
5.2.1
Channel selection filter
5.2.2
Soft mute
Table 24.
De-emphasis filter
(continuous set)
Symbol
Parameter
Test condition
Min
Typ
Max
Units
DEtc
De-emphasis time constant 1
-
50
-
µs
De-emphasis time constant 2
-
75
-
Table 25.
Stereo decoder
Symbol
Parameter
Test condition
Min
Typ
Max
Units
PilSup
Pilot signal suppression
Pilot 9%, 19 kHz, ref=40 kHz
-
60
-
dB
SubcSup
Subcarrier suppression
f = 38 kHz
-
70
-
dB
f = 57 kHz
-
70
-
dB
f = 76 kHz
-
80
-
dB
Table 26.
Channel selection filter
Symbol
Parameter
Test condition
Min
Typ
Max
Units
CSF BW
Channel selection filter BW
response: - 3dB
-
±3.7
-
kHz
Table 27.
Soft mute
(continuous set)
Symbol
Parameter
Test condition
Min
Typ
Max
Units
SMsp
Start point vs. field strength
audio atten = 1 dB
read “FM_softmute”
no adjacent channel present
025
40
dBµV
SMep
End point vs. field strength
audio atten = SMd + 1 dB
read “FM_softmute”
no adjacent channel present
0
0
30
dBµV
SMd
Depth
-40
-24
0
dB
SMtauatt
Transition time for field
strength-dependent soft mute
activation
0.001
0.1
10
s
SMtaurel
Transition time for field
strength-dependent soft mute
release
0.001
3
10
s



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