AN7259S Datasheet, PDF (1/5 Pages) Panasonic Semiconductor – FM-IF Amplifier Circuit for Car Radio

ICs for FM/AM Tuner
AN7259S
FM-IF Amplifier Circuit for Car Radio
s Overview
The AN7259S is an FM–IF/DET IC for car radio/car
stereo and has each function necessary for electronic-
tuner.
s Features
• Quadrature detection system and fewer external parts
• Good linearity of control voltage output used for AGC
and separation control, etc.
• IF counter output and search output in channel selec-
tion signal as electronic tuning and with IF counter out-
put ON/OFF circuit (SSC)
• Adjustment of search band width and search output
center frequency
• Soft muting adjusting function
Unit : mm
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
0.3
5.4±0.3
7.7±0.3
20-Lead SOP Package (SOP020-P-0300A)
s Block Diagram
20 19 18 17 16 15 14 13 12 11
FM IF Amp.
Counter
SSC
FM Det.
VCONT.
Search
Mute
Amp.
1
2
3
4
5
6
7
8
9
10
GND
VCC