TDA7405 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7405' PDF : 56 Pages View PDF
TDA7405
Table 7. ELECTRICAL CHARACTERISTICS (continued)
VS = 9V, deemphasis time constant = 50µs, MPX input voltage VMPX = 500mV (75kHz deviation),
modulation frequency = 1kHz, input gain = 6dB, Tamb = 27°C, unless otherwise specified.
Symbol
Parameter
Test Conditions
Min. Typ. Max.
Unit
τDeempF Deemphasis Timeconstants FM
M
VLEVEL >> VHCH
VLEVEL >> VHCH
25
50
75
µs
44
62.5
80
µs
VLEVEL >> VHCH
50
75
100
µs
VLEVEL >> VHCH
70
100 130
µs
MFM Highcut Timeconstant Multiplier FM VLEVEL << VHCL
3
τDeempA Deemphasis Timeconstants AM
M
VLEVEL >> VHCH
VLEVEL >> VHCH
37.5
µs
47
µs
VLEVEL >> VHCH
56
µs
VLEVEL >> VHCH
75
µs
MAM Highcut Timeconstant Multiplier VLEVEL << VHCL
3.7
AM
REF5V Internal Reference Voltage
4.7
5
5.3
V
Lmin min. LEVEL Gain
-1
0
1
dB
Lmaxs max. LEVEL Gain
5
6
7
dB
LGstep LEVEL Gain Step Resolution
see section 2.7
0.2
0.4
0.6
dB
VSBLmin Min. Voltage for Mono
see section 2.8
17
20
23 %REF5V
VSBLmax Max. Voltage for Mono
see section 2.8
62
70
78 %REF5V
VSBLstep Step Resolution
see section 2.8
1.6
3.3
5.0 %REF5V
VHCHmin Min. Voltage for NO Highcut
see section 2.9
37
42
47 %REF5V
VHCHmax Max. Voltage for NO Highcut
see section 2.9
58
66
74 %REF5V
VHCHstep Step Resolution
see section 2.9
4.2
8.4 12.6 %REF5V
VHCLmin Min. Voltage for FULL High cut see section 2.9
15
17
19 %VHCH
VHCLmax Max. Voltage for FULL High cut see section 2.9
29
33
37 %VHCH
VHCLstep Step Resolution
see section 2.9
2.1
4.2
6.3 %REF5V
Carrier and harmonic suppression at the output
α19 Pilot Signalf=19kHz
40
50
dB
α38 Subcarrier f=38kHz
75
dB
α57 Subcarrier f=57kHz
62
dB
α76 Subcarrier f=76kHz
90
dB
Intermodulation (Note 1)
24/57
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