AN7280S Просмотр технического описания (PDF) - Panasonic Corporation

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производитель

AN7280S

FM Front-end IC for Car Radio

Panasonic Corporation 

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

5V

Vref by-pass pin for mixer,OSC buffer,OSC

section

4 OSC Buffer Output

Pin for output OSC signal to pre-scaler

5 Level Detection Output

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

9

70kΩ

39kΩ

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