TDA7421 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7421' PDF : 38 Pages View PDF
TDA7421
FM DEMODULATOR ADJUSTMENT (subaddress 06H)
MSB
SDD
SD
disable
0
1
DEM6
demadj
MSB
0
0
0
0
0
0
0
1
1
DEM5
demadj
0
0
0
0
0
0
1
0
1
DEM4
demadj
DEM3
demadj
DEM2
demadj
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
0
0
0
0
0
0
0
1
1
1
all combinations allowed
DEM1
demadj
0
0
1
0
0
0
0
0
1
LSB
DEM0
demadj
LSB
0
1
0
0
0
0
0
0
1
FUNCTION
ADJUSTMENT
CAPACITOR
0
Cdemod
2Cdemod
4Cdemod
8Cdemod
16Cdemod
32Cdemod
64Cdemod
127Cdemod
SD DISABLE
SD ENABLED
SD DISABLED (High
impedance output)
FM IF BUFFERS (subaddress 07H)
MSB
FBL3
FBL2
FBL1
FBL0
FBH3 FBH2 FBH1
LSB
FBH0
buff2 buff2 gain buff2 gain buff2 gain buff1
buff1 buff1 gain buff1
gain MSB
LSB gain MSB gain MSB
gain LSB
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
1
0
0
0
all else not allowed
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
1
0
0
0
all else not allowed
FUNCTION
BUFFER 1 GAIN (dB)
19.5
15.5
16.5
17.5
18.5
BUFFER 2 GAIN (dB)
8
4
5
6
7
31/38
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