Panasonic AN7223 Am tuner, fm/am if amplifier circuit for radio cassette recorder Datasheet

ICs for FM/AM Tuner
AN7223
AM Tuner, FM/AM IF Amplifier Circuit for Radio Cassette Recorder
■ Overview
Unit : mm
(FM/AM common use)
• AM : High sensitivity,including RF amplifier
• Low power consumption
• Muting control
• AFC control
• Fewer external parts
• High stability on both AM and FM
• Low shock noise level from function switch operation
• SW band available (f= 30MHz)
18
2
17
3
16
4
15
5
14
6
13
7
12
8
11
9
10
2.54
21.7±0.3
■ Features
• Wide operating supply voltage range : VCC= 2.8V~12V
• Incorporating both FM and AM detectors
• Incorporating a level indicator output
1
0.5±0.1
1.2±0.25
The AN7223 is an IC designed for high-class radio cassette recorder with multifunctioned FM/AM IF system.
0.51min.
6.3±0.25
3.8±0.25
(3.45)
+ 0.1 5
0.2
0.3 –
3 ~ 15˚
7.62±0.25
18-Lead DIP Package (DIP018-P-0300E)
■ Block Diagram
8
9
12
14 VCC
1
7
AM/FM
IF Amp.
FM IF
Amp.
FM
Quad. Det.
Mute Det.
17
16
Mute or
Shock Noise
Canceller
Level Meter
AF
Amp.
13
15
4
3
AM RF
Amp.
AM
Mixer
5
AM
L Osc.
AGC
18
6
AM
Det.
2
VCC (AM)
10
11
GND
ICs for FM/AM Tuner
AN7223
■ Pin Descriptions
Pin No.
Pin Name
Pin No.
Pin Name
1
FM IF Amp. Input
10
AM Detection Output
2
VCC (AM)
11
GND
3
AM RF Amp. Input
12
FM Detector Coil
4
AM Mixer Output
13
AF Output
5
AGC Output (2)
14
VCC
6
AGC Output (1)
15
Level Meter Output
7
AM IF Amp. Input
16
AFC Output
8
IF By-pass
17
Reference Voltage
9
IF By-pass
18
Local Oscillation
■ Absolute Maximum Ratings (Ta=25˚C)
Parameter
Symbol
Rating
Unit
Supply Voltage
VCC
14.4
V
Power Dissipation
PD
317
mW
Operating Ambient Temperature
Topr
–20 ~ + 75
˚C
Storage Temperature
Tstg
–55 ~ + 150
˚C
■ Electrical Characteristics (VCC =5V, Ta= 25˚C)
Parameter
Symbol
Total Circuit Current
Itot
Demodulation Output Level
FM
Limiting Sensitivity
Vi
Muting Sensitivity
Signal Meter Driving
Output 1
Signal Meter Driving
Output 2
Vi (mute)
Total Circuit Current
Itot
Detection Output Level
AM
υO (FM)
Max.Sensitivity
Signal Meter Driving
Output 1
Signal Meter Driving
Output 2
(lim)
V15
V15
υO (AM)
Smax.
V15
V15
Condition
(DC measurement)
Vi= 80dBµ, f=10.7MHz,
fdev.= 22.5kHz, fm= 400Hz
Input at υO= –3dB
Input at υO= less than –20dB
Vi= 50dBµ, f=10.7MHz,
fdev.= 22.5kHz, fm= 400Hz
Vi= 80dBµ, f= 10.7MHz,
fdev.= 22.5kHz, fm= 400Hz
(DC measurement)
Vi= 80dBµ, f= 1MHz,
Mod.= 30%, fm= 400Hz
Input at υO= 10mV
Vi= –10dBµ, f= 1MHz,
Mod.= 30%, fm= 400Hz
Vi= 80dBµ, f= 1MHz,
Mod.= 30%, fm= 400Hz
min.
typ.
max.
Unit
9
14
20
mA
75
100
125
mV
41.5
44.5
47.5
dBµ
45
50
59
dBµ
120
600
1150
mV
1.14
1.26
1.42
V
8
13
19
mA
60
80
100
mV
4.5
9.5
12.5
dBµ
130
mV
1.38
V
0
1.12
1.25
ICs for FM/AM Tuner
AN7223
■ Application Circuit
4
1
18
100µF
470Ω
17
16
15
14
27kΩ
T1
1
VO (FM.AM)
0.01µF
–
0.0047
µF
+
2.2kΩ
–
0.022µF
–
47µF
–
5.1kΩ
6
+
+
10µF
3
+
VCC (5V)
–
V15
22µF
47pF
T2
47Ω
+
100µF
0.022µF
0.022µF
FM
AM
0.022µF
13
12
11
10
6
7
8
9
3
4
5
2.1kΩ
3
10kΩ
1
+
+
–
–
0.02µF
2
100µF
1
4.7µF
AN7223
4
0.02µF
to Front End
47pF
6
T3
Mute
ON
OFF
■ Coil Specifications
Symbol
T1
T2
T3
Use, Freq
Type No.
3
FM
Quad. Coil
10.7MHz
EIF–
7S752A
AM MW
Osc. Coil
ELL–
7S754
AM Mix.
Output
455kHz
Connection
Diagram
Maker
EIA–
7S802A
MATSUSHITA
MATSUSHITA
MATSUSHITA
4
2
1
6
3
4
2
1
6
3
4
2
1
6
Number of
Turns
1 – 2 8T
2 – 3 5T
4 – 6 3T
Tuning Cap.
Unloaded Q
100pF
90±20%
1 – 2 4T
2 – 3 125T
4 – 6 7T
3 – 2 35T
6 – 4 10T
2 – 1 19T
95±20%
1500pF
60±30%
■ Ceramic Filter Specification
Symbol
Use
Type No.
Maker
Center Freq.
Band Width
Loss
CF1
AM IF
CFM2 – 455B
TOKO
455kHz
7kHz (–6dB)
2.6dB
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