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PDF AN7280S Data sheet ( Hoja de datos )
| Número de pieza | AN7280S | |
| Descripción | FM Front-end IC for Car Radio | |
| Fabricantes | Panasonic Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AN7280S (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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ICs for FM/AM Tuner
AN7280S
FM Front-end IC for Car Radio
s Overview
The AN7280S is an FM front-end IC designed for DTS
except RF amp. of car radio. It features built-in local oscil-
lation frequency buffer output, PIN diode driver for anten-
na damping and SSC (search stop control).
s Features
• High sensitivity, high S/N ratio
• Good IM characteristics at strong input
• Available for two loop AGC (keyed AGC)
• Pre IF amp. gain variable
• PIN diode driver (ADX) built-in
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-0300B)
s Block Diagram
GND
20 19 18 17 16 15 14 13 12 11
ADX
OSC
Mixer
Buffer
Buffer
AGC Amp.
Det.
IF Amp.
VREG
SSC
1 2 3 4 5 6 7 8 9 10
GND
VCC
1 page  
ICs for FM/AM Tuner
s Pin Descriptions
Pin No.
Pin Name
1 OSC Emitter
2 OSC Base
Description
Local oscillation transistor emitter pin
Local oscillation transistor base pin
AN7280S
Equivalent Circuit
Vref
2
1
3 OSC By-pass
4 OSC Buffer Output
5 Level Detection Output
Vref by-pass pin for mixer,OSC buffer,OSC
section
5V
Pin for output OSC signal to pre-scaler
AGC signal output pin for RF-Amp.
secondary gate
+
–
3
Vref
4
750Ω
VCC
.70µA
5
6
AGC– Amp. Gain Adjustment
Pin for adjusting AGC Amp. gain by
external resistance
6
5.6kΩ
7 Control Signal Input
8 GND
9 SSC Input
10 VCC
Pin for adjusting AGC-Amp. gain through
input of control signal from IF section
1.5V
1.5kΩ
7
Pin for adjusting AGC-Amp. gain through
input of control signal from microcomputer
Vref
70kΩ
39kΩ
9
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet AN7280S.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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