ICs for FM/AMTuner
AN7273, AN7273S
V
O
, V
no
, THD –V
i
(FM)
Output Voltage V
O
(dB), Output Noise Voltage V
no
(dB)
Output Voltage V
O
(dB), Signal to Noise Ratio S/N (dB)
0
–10
V
O
–20
–30
–40
–50
–60
–70
THD
–80
0
20
40
60
80
100
0
120
V
no
10
V
O
, S/N, THD –V
i
(AM)
1.6
V
O
0
S/N
–10
–20
–30
–40
–50
–60
–70
THD
Mod. = 80%
Level meter Voltage V
15
(V)
0dB = 81mV
V
CC
= 5V
f
m
= 400Hz
f
i
= 1MHz
12
Total Harmonic Distortion THD (%)
10
8
6
4
2
Mod. = 30%
0
20
40
60
80
100
0
120
1.4
1.2
1.0
V
15
–V
i
V
CC
= 5V
(AM) f
i
= 1MHz
f
m
= 400Hz, 30%
(FM) f
i
= 10.7MHz
f
m
= 400Hz, 22.5kHz
AM
FM
0.8
0.6
0.4
0.2
0
4
3
2
1
Total Harmonic Distortion THD (%)
V
CC
= 5V
f
i
= 10.7MHz
f
m
= 22.5kHz,
400Hz
0dB = 108mV
5
0
20
40
60
80
100
120
Input Voltage V
i
(dBµ)
Input Voltage V
i
(dBµ)
Input Voltage V
i
(dBµ)
V
i (lim)
, V
O
, I
tot
–V
CC
(FM)
140
Input Limiting Voltage V
i (lim)
(dBµ)
50
14
Output Voltage V
O
(mV)
140
120
100
Input Voltage V
i
(dBµ)
80
60
40
28
24
20
V
O
, V
i
, I
tot
–V
CC
(AM)
12
10
Total Circuit Current I
tot
(mA)
f
m
= 400Hz, 30%
f
i
= 1MHz
I
tot
(M
48
N)
ute O
I
tot
e OF
(Mut
F)
Output Voltage V
O
(mV)
120
8
46
V
i (lim)
4
44
2
V
CC
= 5V
f
i
= 10.7MHz
0
f
m
= 400Hz, 22.5kHz
0
2
4
6
8
10 12 14 16
6
V
O
(V
i
= 8
0dB
µ
)
14
13
12
100
I
tot
16
12
0
2
4
11
80
V
i
(at V =
O
10mV )
6
8
10
60
10 12 14 16
Supply VoltageV
CC
(V)
Supply Voltage V
CC
(V)
V
O
–V
i
0
Mute OFF
10
V
O
–Df
Mute OFF
0
Mute ON
–20
Output Voltage V
O
(dB)
Output Voltage V
O
(dB)
–10
–20
Mute ON
–30
–40
–50
–60
–80
–70
–300 –200 –100
–40
–60
0
20
40
60
80
100
120
0
100
200
300
Input Voltage V
i
(dBµ)
Input Frequency Change Df (kHz)
Total Circuit Current I
tot
(mA)
V
O
PANASONIC [ PANASONIC SEMICONDUCTOR ]
