TDA7461N Datasheet, PDF (13/31 Pages) STMicroelectronics – CAR RADIO SIGNAL PROCESSOR

TDA7461N
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
STEREOBLEND and HIGHCUT CONTROL
VHCHmin Min.Voltage for NO Highcut
VHCHmax Max. Voltage for NO Highcut
VHCHstep Step Resolution
VHCLmin Min. Voltage for FULL High cut
VHCLmax Max. Voltage for FULL High cut
36
42
46 %REF5V
62
66
70 %REF5V
5
8.4
12 %REF5V
13
17
21 %VHCH
29
33
37 %VHCH
Carrier and harmonic suppression at the output
α19
Pilot Signal
f = 19KHz
α38
Subcarrier
f = 38KHz
α57
Subcarrier
f = 57KHz
α76
Subcarrier
f = 76KHz
40
50
dB
75
dB
62
dB
90
dB
Intermodulation (Note1)
α2
Pilot Signal
α3
f_mod = 10KHz; f_spur = 1KHz;
f_mod = 13KHz; f_spur = 1KHz;
65
dB
75
dB
Traffic Radio (Note 2)
α57
Signal
f = 57KHz
70
dB
SCA - Subsidiary Communications Authorization (Note 3)
α67
Signal
f = 67KHz
75
dB
ACI - Adjacent Channel Interference (Note 4)
α114
Signal
f = 114KHz
α190
Signal
f = 190KHz
95
dB
84
dB
Notes to the characteristics:
1. Intermodulation Suppression: measured with: 91% pilot signal; fm = 10kHz or 13kHz.
2. Traffic Radio (V.F.) Suppression: measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% subcarrier (f = 57kHz,
fm = 23Hz AM, m = 60%)
3. SCA ( Subsidiary Communications Authorization ) measured with: 81% mono signal; 9% pilot signal; fm = 1kHz; 10%SCA - subcarrier
( fs = 67kHz, unmodulated ).
4. ACI ( Adjacent Channel Interference ) measured with: 90% mono signal; 9% pilot signal; fm =1kHz; 1% spurious signal
( fs = 110kHz or 186kHz, unmodulated).
5. By Design/Characterization but functionally guaranteed through dedicated test mode structure
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