TDA7703 Datasheet, PDF (21/32 Pages) STMicroelectronics – Automatic self alignment for image rejection

TDA7703
Electrical specifications
3.5.3
AM LW overall system performance
Antenna level equivalence: 0dBµV = 1µV_rms
Figure 8. AM LW input set-up
50Ω A
15pF _30Ω
V_{rf + 6dB}
V_rf
50Ω
68pF
PCB
UNDER
TEST
Level referred to SG output before antenna dummy (V_rf, node 'A'); capacitive dummy
15pF+68pF; FM input not connected. F_rf = 216 kHz, V_rf =74 dBµV, mod = 30 %, f_audio = 400
Hz, unless otherwise specified.
Table 15. AM LW overall system performance
Parameter
Test condition
Min
Typ Max Units
Tuning range LW
(can be modified by the user) 144
288 kHz
Tuning step LW
(can be modified by the user)
1
kHz
Sensitivity
S/N =20dB
31
34 dBµV
Ultimate S/N
@ 80 dBµV
63
66
dB
AGC F.O.M.
Ref.=74 dBµV
-10dB drop point
50
62
65
dB
Distortion
m = 80 %
0.1
%
Image rejection
80
dB
Rev 1
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