TDA7461
Stereo decoder part
Table 8.
Stereo decoder electrical characteristics (continued)
(VS = 9 V; de-emphasis time constant = 50 μs, VMPX = 500 mV, 75 kHz deviation, f = 1 kHz.
GI = 6 dB, Tamb = 25 °C; unless otherwise specified)
Symbol
Parameter
Test condition
Min. Typ. Max. Unit
De-emphasis and high cut (1)
τHC50
De-emphasis time constant
τHC75
De-emphasis time constant
τHC50
High cut time constant
τHC75
High cut time constant
Stereo blend and high cut-control
Bit = 7, Subadr. 10 = 0
VLEVEL >> VHCH
Bit = 7, Subadr. 10 = 1
VLEVEL >> VHCH
Bit = 7, Subadr. 10 = 0
VLEVEL >> VHCL
Bit = 7, Subadr. 10 = 1
VLEVEL >> VHCL
25 50 75
μs
50 75 100
μs
100 150 200
μs
150 225 300
μs
REF5V Internal reference voltage
TCREF5V
LGmin
LGmax
LGstep
VSBLmin
VSBLmax
VSBLstep
VHCHmin
VHCHmax
VHCHstep
VHCLmin
VHCLmax
Temperature coefficient
Min. level gain
Max. level gain
Level gain step resolution
Min. voltage for mono
Max. voltage for mono
Step resolution
Min.voltage for no high cut
Max. voltage for no high cut
Step resolution
Min. voltage for full high cut
Max. voltage for full high cut
Carrier and harmonic suppression at the output
4.7
5
5.3
V
3300
ppm
-1
0
+1
dB
8
10 12
dB
0.3 0.67 1.0
dB
29 33 37 %REF5V
54 58 62 %REF5V
5.0 8.4 12 %REF5V
36 42 46 %REF5V
62 66 70 %REF5V
5
8.4 12 %REF5V
13 17 21 %VHCH
29 33 37 %VHCH
α19
Pilot signal
α38
Sub carrier
α57
Sub carrier
α76
Sub carrier
Intermodulation (2))
f = 19 kHz
f = 38 kHz
f = 57 kHz
f = 76 kHz
40 50
dB
75
dB
62
dB
90
dB
α2
Pilot signal
α3
fmod = 10 kHz
fspur = 1 kHz;
fmod = 13 kHz;
fspur = 1 kHz;
65
dB
75
dB
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