BA4424 데이터 시트보기 (PDF) - ROHM Semiconductor

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BA4424

FM / TV front end

ROHM Semiconductor 

Audio ICs

FM / TV front end

BA4424N

The BA4424N is a monolithic IC designed for FM front end use. It consists of an RF amplifier circuit, mixer circuit, local

oscillation circuit, IF buffer amplifier, and a variable capacitor-diode for AFC.

FFeatures

1) An RF amplifier, mixer, local oscillator, IF buffer am-

plifier, and AFC diode are included on-chip.

2) Reception of VHF terrestrial TV channels is possible.

3) Uses a double balance mixer to improve intermo-

dulation characteristics.

4) Includes a clamp diode in the mixer output.

5) Local oscillation buffer on-chip for improved re-

sponse to strong input.

6) The output impedance of the IF buffer amplifier is

matched with the ceramic filter impedance at 330Ω.

FAbsolute maximum ratings (Ta = 25_C)

7) A resistive load can also be used for the mixer out-

put.

8) Mixer input coupling capacitor included on-chip.

9) Includes a feedback capacitor for the local oscilla-

tion circuit.

10) Compact 9-pin SIP package. Pins arranged for

convenient mounting.

FRecommended operating conditions (Ta = 25_C)

48

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