TDA7406 Datasheet, PDF (28/64 Pages) STMicroelectronics – Car radio signal processor

Stereodecoder part
TDA7406
Table 5.
Symbol
Stereodecoder electrical characteristics (continued)
V_S = 9V, de-emphasis time constant = 50µs, MPX input voltage VMPX = 500mV (75kHz
deviation), modulation frequency = 1kHz, input gain = 6dB, T_amb = 27°C, unless
otherwise specified.
Parameter
Test Conditions
Min. Typ. Max.
Unit
PLL
Δf/f Capture Range
DEEMPHASIS and HIGHCUT
V_LEVEL >> V_HCH
τ_DeempFM De-emphasis Time constants FM ^{VLEVEL >> VHCH}
V_LEVEL >> V_HCH
V_LEVEL >> V_HCH
M_FM
Highcut Time constant Multiplier
FM
V_LEVEL << V_HCL
V_LEVEL >> V_HCH
τ_DeempAM De-emphasis Time constants AM ^{VLEVEL >> VHCH}
V_LEVEL >> V_HCH
V_LEVEL >> V_HCH
M_AM
High cut Time constant Multiplier
AM
V_LEVEL << V_HCL
REF5V Internal Reference Voltage
L_min min. LEVEL Gain
L_maxs max. LEVEL Gain
L_Gstep LEVEL Gain Step Resolution
VSBL_min Min. Voltage for Mono
VSBL_max Max. Voltage for Mono
VSBL_step Step Resolution
VHCH_min Min. Voltage for NO Highcut
VHCH_max Max. Voltage for NO Highcut
VHCH_step Step Resolution
VHCL_min Min. Voltage for FULL High cut
VHCL_max Max. Voltage for FULL High cut
VHCL_step Step Resolution
Carrier and harmonic suppression at the output
α19 Pilot Signalf=19kHz
α38 Subcarrier f=38kHz
α57 Subcarrier f=57kHz
α76 Subcarrier f=76kHz
0.5
%
25
50
75
µs
44 62.5 80
µs
50
75 100
µs
70 100 130
µs
3
37.5
µs
47
µs
56
µs
75
µs
3.7
4.7
5
5.3
V
-1
0
+1
dB
5
6
7
dB
0.2 0.4 0.6
dB
17
20
23 %REF5V
62
70
78 %REF5V
1.6 3.3 5.0 %REF5V
77
42
47 %REF5V
58
66
74 %REF5V
4.2 8.4 12.6 %REF5V
15
17
19 %VHCH
29
33
37 %VHCH
2.1 4.2 6.3 %REF5V
40
50
dB
75
dB
62
dB
90
dB
28/64