TDA7402 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7402' PDF : 69 Pages View PDF
TDA7402
Stereo decoder part
Table 7.
Symbol
Stereo decoder electrical characteristics (continued)
Parameter
Test condition
Min. Typ. Max. Unit
Intermodulation (Note 4.3.1)
α2
fmod=10kHz, fspur=1kHz
α3
fmod=13kHz, fspur=1kHz
Traffic Radio (Note 4.3.2)
α57 Signal f=57kHz
65
dB
75
dB
70
dB
SCA - Subsidiary Communications Authorization (Note 4.3.3)
α67 Signal f = 67kHz
t(s) ACI - Adjacent Channel Interference (Note 4.3.4)
c α114
u α190
Signal f=114kHz
Signal f=190kHz
75
dB
95
dB
84
dB
Prod 4.3
lete 4.3.1
Obsolete Product(s) - Obso 4.3.2
Notes about the characteristics
Intermodulation suppression
α2
=
----V-----O----(--s----i-g----n----a---l--)---(--a----t--1---k---H-----z---)----
VO ( s p u r i o u s ) ( a t 1 kHz )
;fs
=
(2 ⋅ 10kHz) – 19kHz
α3
=
----V-----O----(--s----i-g----n----a---l--)---(--a----t--1---k---H-----z---)----
VO ( s p u r i o u s ) ( a t 1 kHz )
;fs
=
(3 ⋅ 13kHz) – 38kHz
measured with: 91% pilot signal; fm = 10kHz or 13kHz.
Traffic radio (V.F.) suppression
α57(V.W.F)= -V----O----(--s----p--V--u--O-r---i(-o--s--u-i--g-s--n-)--(-a--a--l-)-t--1(--a-k---tH--1---z-k---H±----z-2--)-3----k---H-----z---)-
measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% subcarrier
(f=57kHz, fm=23Hz AM, m=60%)
4.3.3 SCA (subsidiary communications authorization)
α67
=
----V-----O----(--s----i-g----n----a----l-)---(--a----t--1---k---H-----z---)----
V O ( s p u r i o u s ) ( a t 1 kHz )
;fs
=
(2 ⋅ 38kHz) – 67kHz
measured with: 81% mono signal; 9% pilot signal; fm=1kHz; 10%SCA - subcarrier
(fS = 67kHz, unmodulated).
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