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LA72914V Datasheet(PDF) 6 Page - ON Semiconductor

Part No. LA72914V
Description  FM Modulator and Demodulator IC
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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LA72914V
No.A1859-6/9
Continued from preceding page.
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
Continued on next page.




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