ICs for FM/AMTuner
AN7273, AN7273S
VO, S/N, THD –Vi (AM)
V15 –Vi
VO, Vno, THD –Vi (FM)
10
0
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
V
CC = 5V
(AM) fi = 1MHz
VO
fm = 400Hz, 30%
–10
VCC = 5V
fi = 10.7MHz
(FM) fi = 10.7MHz
0dB = 81mV
CC = 5V
m = 400Hz
fi = 1MHz
S/N
VO
fm = 400Hz, 22.5kHz
V
12
10
8
–10
–20
–30
–40
–50
–60
–70
–20
–30
–40
–50
–60
–70
–80
f
m = 22.5kHz,
f
400Hz
AM
0dB = 108mV
5
4
3
2
1
0
FM
Vno
THD
Mod. = 80%
6
4
2
Mod. = 30%
60 80
THD
0
0
20
40
100 120
0
20
40
60
80
100 120
0
20
40
60
80
100 120
Input Voltage Vi (dBµ)
Input Voltage Vi (dBµ)
Input Voltage Vi (dBµ)
Vi (lim), VO, Itot –VCC (FM)
VO, Vi, Itot –VCC (AM)
140
120
100
80
50
48
46
44
14
140
120
100
80
f
m = 400Hz, 30%
12
10
8
fi = 1MHz
VO
28
24
20
16
12
14
13
12
11
10
6
60
Vi (lim)
4
40
Itot
2
V
CC = 5V
fi = 10.7MHz
fm = 400Hz, 22.5kHz
0
60
0
2
4
6
8
10 12 14 16
0
2
4
6
8
10 12 14 16
Supply VoltageVCC (V)
Supply Voltage VCC (V)
VO –Vi
VO –Df
0
10
0
Mute OFF
Mute OFF
Mute ON
–20
–40
–60
–80
–10
–20
–30
–40
–50
–60
–70
Mute ON
0
20
40
60
80
100 120
–300 –200 –100
0
100 200 300
Input Voltage Vi (dBµ)
Input Frequency Change Df (kHz)
PANASONIC [ PANASONIC ]
