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參數(shù)資料
| 型號： | TDA7421 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | AM/FM TUNER FOR CAR RADIO AND Hi-Fi APPLICATIONS |
| 中文描述： | AM / FM調(diào)諧的汽車收音機(jī)及音響應(yīng)用 |
| 文件頁數(shù)： | 35/38頁 |
| 文件大?。?/td> | 527K |
| 代理商： | TDA7421 |
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IF1Vcc & IF2 Vcc
Gnd
+Vs
Supply Voltage (12V)
Ground path
PLLVcc
RFVcc
OSCVcc
+5V
10u + 100n
L4916
G
G
6
G
7
G
8
OUT 8.5V
4
+
1
F.C.
2
N.C.
3
220n
100u
+
MR1
47u
+
220n
100n
10
10
10
10
JP1
L78L05A
V
1
G
2
G
3
N
4
N
5
G
6
G
7
V
8
220n
5
Evaluation Board Schematic Circuit (part E)
Notes:
- The components shown on the evaluation board schematic without the part value, are required only
for measurements between intermediate input/outputs:
- Parts description:
CF1
Ceramic filter 10.7MHz, 180KHz BW
CF3-CF4
Ceramic filter 10.7MHz, 150KHz BW
CF2
Ceramic filter 450KHz, 6KHz BW
T1
FM RF transformer
Unloaded Q= 103
3-1= 3 1/2T - 6-4= 1T 0.12
φ
2UEW
C
TUNING
(3-1)= 24pF @ 100MHz
T2
AM/FM IF1 transformer
Unloaded Q= 70
1-3= 13T - 1-5= 6 1/2T - 5-3= 6 1/2T - 4-6= 2T 0.08
φ
2UEW
C
INT
(1-2) = C
INT
(2-3) = 82pF; C
EXT
(1-3) = 10pF
T3
AM IF2 transformer
Unloaded Q= 40
1-3= 178T - 1-2= 89T - 2-3= 89T - 4-6= 33T 0.05
φ
2UEW
C
INT
(1-3) = 180pF; C
EXT
(1-3) = 20pF
L2
Oscillator coil
Unloaded Q= 80
6-4= 2 1/2T 0.12
φ
2UEW
C
TUNING
(6-4)= 36.8pF @ 100MHz
L6
Demodulator Coil
Unloaded Q= 35
6-4= 27T 0.1
φ
2UEW
C
INT
(4-6)= 47pF; C
EXT
(4-6) = 13.5pF
TDA7421
35/38
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| TDA7421N | 制造商:ST 功能描述:AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS |
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| TDA7427AAD | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER |
| TDA7427AAD1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER |
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