TDA7705_10 Datasheet, PDF (34/42 Pages) STMicroelectronics – Highly integrated tuner for AM/FM car radio

Weak signal processing
TDA7705
5.1.3 Adjacent channel mute
Table 28. Adjacent channel mute
(continuous set)
Symbol
Parameter
ACMd Depth
Test condition
Min
Typ
Max Units
SMd
0
0
dB
5.1.4 Stereo blend-
Table 29. Stereo blend
(continuous set)
Symbol
Parameter
Test condition
Min
Typ
Max Units
MaxSep
Maximum stereo separation
field strength = 80 dBµV, pilot
deviation = 6.75 kHz
0
40
50
dB
separation = MaxSep - 1 dB
SBFSsp Start point vs. field strength
20
50
60 dBµV
no multipath present
SBFSep End point vs. field strength
separation = 1 dB
no multipath present
20
30
60 dBµV
Field strength-related
SBFStM2S transition time from mono to
stereo
V_rf step-like variation from
20 dBµV to 80 dBµV
0.001
3
20
s
Field strength-related
SBFStS2M transition time from stereo to
mono
V_rf step-like variation from
80 dBµV to 20 dBµV
0.001 0.5
20
s
SBMPsp Start point vs. multipath
separation = MaxSep - 1 dB
equivalent 19 kHz AM
modulation depth;
5
field strength = 80 dBµV
10
80
%
SBMPep End point vs. multipath
separation = 1 dB
equivalent 19 kHz AM
modulation depth;
field strength = 80 dBµV
5
30
80
%
SBMPtM2S
Multipath -related transition
time from mono to stereo
V_rf step-like variation from
20 dBµV to 80 dBµV
0.001
1
20
s
SBMPtS2M
Multipath -related transition
time from stereo to mono
V_rf step-like variation from
80 dBµV to 20 dBµV
0.001 0.001 20
s
Threshold on pilot tone
Pil ThrM2S Pilot detector stereo threshold deviation for mono-stereo
transition
0.8
2.74
7
kHz
Pil ThrHyst
Pilot detector threshold
hysteresis
Difference in pil. det.
deviation threshold for stereo
to mono transition compared
-
0.01
-
kHz
to PilThrM2S
34/42
Doc ID 15938 Rev 8