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LMC568CM-LMC568CMX
Low Power Phase-Locked Loop
LMC568
Low Power Phase-Locked Loop
General DescriptionThe LMC568isan amplitude-linear phase-locked loop con-
sistingofa linear VCO, fully balanced phase detectors, and carrier detect output. LMCMOS™ technologyis employed
for high performance with low power consumption.
The VCO hasa linearized control rangeof ±30%to allow
demodulationof FM and FSK signals. Carrier detectis indi-
cated whenthe PLLis lockedtoan input signal greater than mVrms. LMC568 applications include FM SCA andTV
second audio program decoders, FSK data demodulators,
and voice pagers.
Features Demodulates ±15% deviation FM/FSK signals Carrier Detect Output with hysteresis Operationto 500 kHz input frequency Low THD —0.5% typ.for ±10% deviation2Vto9V supply voltage range Low supply current drain
Typical Application (100 kHz input frequency, referto notespg.3)
Order Number LMC568CMor LMC568CN
See NS Package Number M08Aor N08E
May 1999
LMC568
Low
Power
Phase-Locked
Loop
