LA72914V

No.A1859-6/9

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Pin No.

Pin Name

Description

Equivalent circuit

7

De-emphasis Filter

De-emphasis filter pin.

De-emphasis time constant must be matching at

emphasis time constant.

Recommend value is 6800pF to 0.01

μF. Connect Cap.

Coupling to pin8.

7

C1

SIG

8

RX Audio IN

Internal DC bias is 2.4V.

Please connect Cap. coupling.

8

C1

2.4V

9

Audio OUT

Audio signal output pin.

Push-pull output pin. Output level is 1.0Vp-p at 1kHz.

(Load resistance=10k

Ω)

9

10

FM Filter

FM demodulator filter pin.

Please connect 1.0

μF capacitor.

(If you need rising of low frequency gain, then change

more large capacitor in use.)

10

11

AGC Filter

FM AGC filter pin.

Please connect 0.1

μF capacitor. If you need reduce

AGC-gain, then connect resistor (R1: 11pin-VCC)

If FM AGC no need, please set pin11 voltage over 4.5V

DC voltage.

11

C1

R1

AGC-DET

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