AN7243 データシートの表示（PDF） - Panasonic Corporation

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AN7243

ICs for FM/AM Tuner

Panasonic Corporation 

AN7243S

s Pin Descriptions

Pin No.

Pin Name

Typ. Waveform

1 Oscillation Emitter

108.7MHz

Description

Oscillation transistor's emitter pin

2 Oscillation Base

3

VCC

108.7MHz

Oscillation transistor's base pin

DC

8V

Main circuit VCC

4 OSC Output

108.7MHz

Output oscillation signal to

microcomputer through buffer.

ICs for FM/AM Tuner

Equivalent Circuit

2

1

VCC

4

6.6V

5 AGC Output

Output AGC signal according to

Mix. output dimensions.

≅ 0V

≅70µA

5

6

AGC-Amp. Gain

Adjustment

Adjust AGC-Amp. gain by external

DC

0.8V

resistance.

(Refer to P.275 AGC circuit.)

6

7 IF Amp. Output

10.7MHz

IF signal (10.7MHz) output pin

Zout ≅ 330Ω

7

8 IF Amp. By-pass

9 IF Amp. Input

10.7MHz

DC

3.2V

IF amp. by-pass control

IF signal (10.7MHz) input pin

10

Mix. Output

11

10.7MHz

10.7MHz

Convert RF signal to IF signal and

output.

Note) Typical waveform frequency is the value when tuning receiving frequency to 98.0MHz.

9

330Ω

8

10

11

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