tda7421n STMicroelectronics, tda7421n Datasheet - Page 16

• Manufacturer Part Number: tda7421n
• Description: Am/fm Tuner For Car Radio And Hi-fi Applications
• Manufacturer: STMicroelectronics

TDA7421N
Figure 1. AM Test Circuit
Figure 2. FM Test Circuit
16/38
V
5K
Tun
V
MiXFMIN
V
MIX1AMIN
50
V1
L2
15pF
15pF
V
V
FMRFAGCIN
FMAGCOUT
V
CC
VXTAL
T1
22pF
10nF
330K
V
1M
Tun
10nF
1
2
11
12
15pF
68pF
64
V
3
4
8
9
5
6
AMTADJ
14
W & N
AGC
V
63
CC
V
AMSD
40
V
61
RFADJ
T2
15
61
T2
V
V
PLLOUT
FM AGC
AMSMETER
16
330
41
330
60
V
10nF
FMSD
40
V
V
60
V
FMIFAGCIN
CC
MIXOUT
V
58
V
V
59
MiX2AMIN
10nF
MiXOUT
SMSHIFT
AGC2
41
31
57
53
330
V
AUDIO
V
CC
56
39
52
10nF
DET
-
+
100K
AUDIO
32
10nF
V
330
FMAMP1OUT
55
42
T3
51
+
AMSMETER
2K
-
10nF
330
10nF
1
V
DEMOD
MUTEDRIVE
2K
2
50
330
330
54
35
34
33
49
10nF
31
D98AU910
-
+
10nF
2
1
V
330
FMAMP2OUT
48
V
46
45
38
37
SMFLT
V
330
D00AU1196
V
IF2AMPOUT
10nF
10nF
IF2AMPIN
V
FMLIMIN
L6