TDA7703 Datasheet, PDF (27/32 Pages) STMicroelectronics – Automatic self alignment for image rejection

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