TDA7402_07 Datasheet, PDF (35/71 Pages) STMicroelectronics – Car radio signal processor

TDA7402
Stereo decoder part
Table 7.
Symbol
Electrical characteristics (continued)
Parameter
Test condition
Intermodulation (Note 2.3.1)
α2
f_mod=10kHz, f_spur=1kHz
α3
f_mod=13kHz, f_spur=1kHz
Traffic Radio (Note 2.3.2)
α57 _{Signal f=57kHz}
SCA - Subsidiary Communications Authorization (Note 2.3.3)
α67 _{Signal f = 67kHz}
ACI - Adjacent Channel Interference (Note 2.3.4)
α114 _{Signal f=114kHz}
α190 _{Signal f=190kHz}
Min. Typ. Max. Unit
65
dB
75
dB
70
dB
75
dB
95
dB
84
dB
5.3
5.3.1
5.3.2
5.3.3
Notes about the characteristics
Intermodulation suppression
α2
=
----^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 )
;f_s
=
(2 ⋅ 10kHz) – 19kHz
α3 = -_V---^V-_O----^O₍--_s--⁽--_ps----_ui--^g--_r-ⁿ-_i--_o-^a---_u-^l--⁾_s--⁽--₎-^a-₍---^ta--¹--_t-^k-₁--^H-_k---_H-^z---⁾-_z----₎ ;f_s = (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%)
SCA (subsidiary communications authorization)
α 67
=
----^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 )
;f_s
=
(2 ⋅ 38kHz) – 67kHz
measured with: 81% mono signal; 9% pilot signal; fm=1kHz; 10%SCA - subcarrier
( f_S = 67kHz, unmodulated ).
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