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TDA7705 データシート(PDF) 25 Page - STMicroelectronics

部品番号 TDA7705
部品情報  Highly integrated tuner for AM/FM car radio
PDF  42 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7705 データシート(HTML) 25 Page - STMicroelectronics

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TDA7705
Electrical specifications
Doc ID 15938 Rev 9
25/42
3.5.2
AM MW overall system performance
Antenna level equivalence: 0 dBµV = 1 µVrms.
Figure 11.
AM MW input set up
Level referred to SG output before antenna dummy (Vrf, node 'A'); capacitive dummy
15pF+68pF, FM input not connected. Frf = 999 kHz (1000 kHz for US), Vrf =74 dBµV,
mod = 30%, faudio =400 Hz, unless otherwise specified.
Image rejection
-
-
80
-
dB
Logarithmic field strength
indicator
@40 dBµV
read “FM_Smeter_log”
-0.33
(equiv.
to 37
dBµV)
-0.3
-0.27
(equiv.
to 43
dBµV)
--
1.
Signal levels referred to combiner output.
Table 17.
FM overall system performance (continued)
Parameter
Test condition
Min
Typ
Max
Units
Table 18.
AM MW overall system performance
Parameter
Test condition
Min
Typ
Max
Units
Tuning range MW Eu/Jp
(can be modified by the user)
531
-
1629
kHz
Tuning step MW Eu/Jp
(can be modified by the user)
-
9
-
kHz
Tuning range MW US
(can be modified by the user)
530
-
1710
kHz
Tuning step MW US
(can be modified by the user)
-
10
-
kHz
Sensitivity
S/N = 20 dB
-
27
30
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
-
%
Adjacent channel selectivity
F=9 kHz, SINAD = 26 dB
undesired. m=30%, 1 kHz
-42
-
dB
Alternate channel selectivity
F=18 kHz, SINAD=26 dB
undesired. m=30%, 1kHz
-50
-
dB
PCB
UNDER
TEST
30
Ω
Vrf + 6dB
Vrf
50
Ω
50
Ω
15pF
68pF
A



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