TDA7705_10 Datasheet, PDF (27/42 Pages) STMicroelectronics – Highly integrated tuner for AM/FM car radio

TDA7705
Electrical specifications
3.5.3
AM LW overall system performance
Antenna level equivalence: 0 dBµV = 1 µV_rms
Figure 12. AM LW input set-up
V_{rf + 6dB}
50Ω A
V_rf
15pF _30Ω
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 19. 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 =20 dB
-
30
33 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
Doc ID 15938 Rev 8
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