参数资料
型号: TDA7421N
厂商: STMICROELECTRONICS
元件分类: 接收器
英文描述: AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64
封装: TQFP-64
文件页数: 36/47页
文件大小: 374K
代理商: TDA7421N
TDA7421N
Data byte specification
11
25 %
all combinations allowed
Voffset antenna varicap / VPLL
X0
0
00
01
-3.6 %
00
10
-7.2 %
0
1
0
-14.3 %
01
11
-25 %
10
01
3.6 %
10
7.2 %
11
00
14.3 %
11
25 %
all combinations allowed
Table 31.
Front-end adjustment (subaddress 05H) (continued)
MSB
LSB
Function
ANA3
ANA2
ANA1
ANA0
RFA3
RFA2
RFA1
RFA0
ANT
adjustm
±
ANT
adjustm
MSB
ANT
adjustm
ANT
adjustm
LSB
RF
adjustm
±
RF
adjustm
MSB
RF
adjustm
RF
adjustm
LSB
Table 32.
FM demodulator adjustment (subaddress 06H)
MSB
LSB
Function
DEM6
DEM5
DEM4
DEM3
DEM2
DEM1
DEM0
demadj
MSB
demadj
LSB
Adjustment capacitor
0
000
00
0
000
00
1
Cdemod (= 50fF)
0
000
01
0
2Cdemod
0
000
10
0
4Cdemod
0
001
00
0
8Cdemod
0
010
00
0
16Cdemod
0
100
00
0
32Cdemod
1
000
00
0
64Cdemod
1
111
11
1
127Cdemod
all combinations allowed
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