TDA7405_04 Datasheet, PDF (25/57 Pages) STMicroelectronics – EQUALIZER CARRADIO SIGNAL PROCESSOR

TDA7405
Table 7. ELECTRICAL CHARACTERISTICS (continued)
V_S = 9V, deemphasis time constant = 50µs, MPX input voltage V_MPX = 500mV (75kHz deviation),
modulation frequency = 1kHz, input gain = 6dB, T_amb = 27°C, unless otherwise specified.
Symbol
Parameter
Test Conditions
Min. Typ. Max.
Unit
α2 f_mod=10kHz, f_spur=1kHz
65
dB
α3 f_mod=13kHz, f_spur=1kHz
75
dB
Traffic Radio (Note 2)
α57 Signal f=57kHz
70
dB
SCA - Subsidiary Communications Authorization (Note 3)
α67 Signal f=67kHz
75
dB
ACI - Adjacent Channel Interference (Note 4)
α114 Signal f=114kHz
95
dB
α190 Signal f=190kHz
84
dB
7 NOTES TO THE CHARACTERISTICS
Note 1. Intermodulation Suppression
α 2 = _V-----^V_o---₍-^o-_s--⁽--_ps----_ui--^g-_r---ⁿⁱ--_o-^a--_u--^l--⁾_s--⁽--₎-^a-₍--^t-_a--¹--_t-^k-₁---^H-_k---_H-^z---⁾-_z---₎ ;ƒ_s = (2 ⋅ 10kHz ) – 19kHz
α 3 = _V-----^V_o---₍-^o-_s--⁽--_ps----_ui--^g-_r---ⁿⁱ--_o-^a--_u--^l--⁾_s--⁽--₎-^a-₍--^t-_a--¹--_t-^k-₁---^H-_k---_H-^z---⁾-_z---₎ ;ƒ_s = (3 ⋅ 13kHz ) – 38kHz
measured with: 91% pilot signal; fm = 10 kHz or 13 kHz.
Note 2. Traffic Radio (V.F.) Suppression
measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% subcarrier (f=57kHz, fm=23Hz AM, m=60%)
α 57( V.W.F.) = -_V----_o---₍--_s----_p-^V---_u-^o--_r-⁽--_i-^s-_o--ⁱ-_u-^g---_s-ⁿ---₎-^a-₍--^l-_a-⁾--_t-⁽--_1a---_k-^t--¹-_H---^k--_z-^H--_±---^z2---⁾-₃---_k---_H----_z----₎
Note 3. SCA ( Subsidiary Communications Authorization )
α67 = -_V----^V_o---₍-^o--_s-⁽--_ps----_ui--^g--_r--ⁿⁱ--_o-^a---_u-^l--⁾_s--⁽--₎-^a-₍---^ta--¹-_t---_9k---^Hk----_H-^z---⁾-_z---₎ ;ƒ_s = (3 ⋅ 38kHz) – 67kH z
measured with: 81% mono signal; 9% pilot signal; fm=1kHz; 10%SCA - subcarrier ( fs = 67kHz, unmodulated ).
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