參數(shù)資料
型號(hào): TDA7421N
廠商: STMICROELECTRONICS
元件分類: 接收器
英文描述: AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64
封裝: TQFP-64
文件頁(yè)數(shù): 39/47頁(yè)
文件大小: 374K
代理商: TDA7421N
Component description
TDA7421N
7
Component description
Table 36.
Component description
Component
Description
CF1
Ceramic filter 10.7 MHz, 180 kHz BW
CF3-CF4
Ceramic filter 10.7 MHz, 150 kHz BW
CF2
Ceramic filter 450 kHz, 6 kHz BW
T1
FM RF transformer
Unloaded Q= 69
3-1= 3 3/4T - 6-4= 3T 0.12f2UEW
CTUNING(3-1)= 26.6 pF @ 100 MHz
T2
AM/FM IF1 transformer
Unloaded Q= 70
1-3= 12T - 1-5= 6 - 5-3= 6 - 4-6= 2T 0.08f2UEW
CINT(1-3) = 51 pF; CEXT(1-3) = 5 pF
T3
AM IF2 transformer
Unloaded Q= 40
1-3= 178T - 1-2= 89T - 2-3= 89T - 4-6= 33T 0.05f2UEW
CINT(1-3) = 180 pF; CEXT(1-3) = 20 pF
L2
Oscillator coil
Unloaded Q= 8
06-4= 2 1/2T 0.12f2UEW
CTUNING(6-4)= 36.8 pF @ 100 MHz
L6
Demodulator Coil
Unloaded Q= 35
6-4= 27T 0.1f2UEW
CINT(4-6)= 47 pF; CEXT(4-6) = 13.5 pF
AM BPF RC
2.7K
18nF
27nF
100K
D98AU915
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