ICs for FM/AM Tuner
n Overview
The AN7223 is an IC designed for high-class radio cas-
sette recorder with multifunctioned FM/AM IF system.
n Features
• Wide operating supply voltage range : V
CC
= 2.8V~12V
• Incorporating both FM and AM detectors
• Incorporating a level indicator output
(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)
AN7223
AM Tuner, FM/AM IF Amplifier Circuit for Radio Cassette Recorder
1
2
3
4
5
6
7
8
9
21.7
–
0.3
1.2
–
0.25
3 ~ 15˚
Unit : mm
6.3– 0.25
0.5
–
0.1
2.54
18-Lead DIP Package (DIP018-P-0300E)
(3.45)
7.62– 0.25
0.3
+ 0.1
– 0.25
18
17
16
15
14
13
12
11
10
0.51min.
3.8– 0.25
8 9 12
5 18 6 2 10 11
15
13
16
17
14
1
7
4
3
AM/FM
IF Amp.
FM IF
Amp.
FM
Quad. Det.
Mute Det.
Level Meter
Mute or
Shock Noise
Canceller
AF
Amp.
AM RF
Amp.
AM
Mixer
AM
L Osc.
AGC
AM
Det.
GNDVCC (AM)
VCC
n Block Diagram