TDA7421 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7421' PDF : 38 Pages View PDF
TDA7421
Evaluation Board Schematic Circuit (part C)
see schematic (part D)
TP12 TP11
FMIF AMP2OUT 48
IF1 VCC 47
FM LIM IN+ 46
FM LIM IN- 45
IF1 GND 44
FM BW TC 43
FM MUTE DRIVE 42
FM/AM S-METER 41
FM SD/AM SD 40
AUDIO OUT 39
FM QUAD+ 38
FM QUAD- 37
IF2 VCC 36
AM IF2 IN 35
AM REF 34
AM BPF 33
IF1Vcc
22n
TP14
TP15
0
22n
2.2u
1u
100K
5K6
IF2Vcc
1mH
10n
120p
TP17
+
22u
0
CF4
10.7MHz
50
TP13 TP16
AUDIO OUT
L6
FMIF2
Evaluation Board Schematic Circuit (part D)
AM IN
27
50
RFVcc
FMIF1
TP5
50
1
27
RFVcc
100n
1mH
82p
0
1K
100n
AMAMP
15p
0
10n
1u +
4K7 T2
0
0
CF1
10.7MHz
TP3 TP4
0
1
1
T3
470
1.5n
1M
68p
68uH
0
82p
10n
0
4K7
+
1u
TP1
1
2K7
1u
68uH
120p RFVcc
10n
TP2
1
18p
10n
3p
22n
0
TP6
TP7
1
1
AMIF
50
0
0
0
1 TP8
F2
450KHz
0
0
RFVcc
0
22n
F3 10.7MHz
0
22n
22n
0
1 TP10
1 TP9
From pin 1 - AM MIX IN-
34/38
From pin 35 - AM IF2 IN
From pin 48 - FMIF AMP2 OUT
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