ICs for FM/AM Tuner
AN7280S
AGC ON Level
110
V
CC
= 8V
f
in
= 18MHz
Radj. is Piny external resistance
(AGC Start Point Variable)
AGC ON Level (dBµV)
IF-Amp. Gain Adjustment
IF Amp.
Input
13
f=10.7MHz
40
100
Output
330Ω
Amp. Gain Adjustment
with AGC
V
CC
= 8V
f
in
= 98MHz No Adjustment
Pin7 = HIGH
110
100
90
V
in
(dBµV)
Gain (dB)
30
90
80
Radj.= 0Ω
80
Pin9 =
High
20
27dB
70
60
70
10
50
0
∞
0
Radj.=
∞
60
Pin9 = Low
50
0
1
1.4
1.8
2.2
in
0
1k
10K
4
(V)
0
1k
10K
∞
Pin13 Adjusting Resistance (Ω)
Pin7 V
cont
Pin6 Adjusting Resistance (Ω)
Supply Voltage Change
Supply Voltage Dependence
No Input
35
11
10
5
4
V
ref
15
10
I
tot
V
ref
(V)
3
2
1
0
12
AGC OUT V
t
(V)
9
Supply Voltage Dependence
No Input
110
100
V
in
(dBµV)
Local Oscillation Level
30
25
I
tot
(mA )
60
AGC ON Level
50
20
5
V
t
SSC ON Level (V)
4
3
SSC ON Level
2
1
0
8
7
6
5
4
20
10
0
6
Practical Sensitivity
Limiting Sensitivity
7
8
V
CC
(V)
9
10
5
0
0
2
4
6
V
CC
(V)
8
10
5
6
7
8
9
10
11
12
V
CC
(V)
Temperature Characteristics
80
70
60
4
V
in
(dBµV)
10
IC for IF/DET
is normal temperature
8
6
Total Gain
Temperature Characteristics
Mixer+IF–Amp.
V
CC
= 8V
105
100
95
90
V
in
(dBµV)
85
80
75
70
65
60
–40 –20
0
20
40 60
80 100
55
AGC Start Point
Temperature Characteristics
Pin7=1V
Pin6=GND
Pin9=OPEN
50
40
30
20
10
AGC ON Level (max. Gain)
Total Gain (dB)
2
0
–2
–4
0dB= 43.5dB
Pin7=HIGH
Pin6=GND
Pin9=OPEN
Pin7=HIGH
Pin6=OPEN
Pin9=5V
Pin7=HIGH
Pin6=OPEN
Pin9=OPEN
–40 –20
0
20
40 60
80 100
Practical Sensitivity (S/N=30dB)
Limiting Sensitivity
0
20
40
60
80 100
–6
–8
–10
0
–60 –40 –20
Ta (˚C)
Ta (˚C)
Ta (˚C)
PANASONIC [ PANASONIC SEMICONDUCTOR ]
