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LMX2353

National Semiconductor
Part Number LMX2353
Manufacturer National Semiconductor
Description PLLatinum Fractional N Single 2.5 GHz Frequency Synthesizer
Published Apr 25, 2005
Detailed Description LMX2353 PLLatinum Fractional N Single 2.5 GHz Frequency Synthesizer PRELIMINARY June 1999 LMX2353 PLLatinum™ Fractiona...
Datasheet PDF File LMX2353 PDF File

LMX2353
LMX2353

Overview
LMX2353 PLLatinum Fractional N Single 2.
5 GHz Frequency Synthesizer PRELIMINARY June 1999 LMX2353 PLLatinum™ Fractional N Single 2.
5 GHz Frequency Synthesizer General Description The LMX2353 is a monolithic integrated fractional N frequency synthesizer, designed to be used in a local oscillator subsystem for a radio transceiver.
It is fabricated using National’s 0.
5µ ABiC V silicon BiCMOS process.
The LMX2353 contains dual modulus prescalers along with modulo 15 or 16 fractional compensation circuitry in the N divider.
A 16/17 or 32/33 prescale ratio can be selected for the LMX2353.
Using a fractional N phase locked loop technique, the LMX2353 can generate very stable low noise control signals for UHF and VHF voltage controlled oscillators (VCO’s).
The LMX2353 has a highly flexible 16 level programmable charge pump supplies output current magnitudes from 100 µA to 1.
6 mA.
Serial data is transferred into the LMX2353 via a three wire interface (Data, LE, Clock).
Supply voltage can rang...


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