lmc568 National Semiconductor Corporation, lmc568 Datasheet

lmc568

Manufacturer Part Number

lmc568

Description

Low Power Phase-locked Loop

Manufacturer

National Semiconductor Corporation

Datasheet

1.LMC568.pdf (7 pages)

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LMC568

Low Power Phase-Locked Loop

General Description

The LMC568 is an amplitude-linear phase-locked loop con-

sisting of a linear VCO, fully balanced phase detectors, and

a carrier detect output. LMCMOS

for high performance with low power consumption.

The VCO has a linearized control range of

demodulation of FM and FSK signals. Carrier detect is indi-

cated when the PLL is locked to an input signal greater than

26 mVrms. LMC568 applications include FM SCA and TV

second audio program decoders, FSK data demodulators,

and voice pagers.

Typical Application

LMCMOS

™

is a trademark of National Semiconductor Corporation.

™

(100 kHz input frequency, refer to notes pg. 3)

technology is employed

Order Number LMC568CM or LMC568CN

DS009135

See NS Package Number M08A or N08E

30% to allow

Features

n Demodulates

n Carrier Detect Output with hysteresis

n Operation to 500 kHz input frequency

n Low THD — 0.5% typ. for

n 2V to 9V supply voltage range

n Low supply current drain

15% deviation FM/FSK signals

10% deviation

00913501

www.national.com

May 1999

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