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LMX2512

National Semiconductor
Part Number LMX2512
Manufacturer National Semiconductor
Description Frequency Synthesizer System
Published Apr 25, 2005
Detailed Description LMX2502/LMX2512 Frequency Synthesizer System with Integrated VCO June 2003 LMX2502/LMX2512 PLLatinum™ Frequency Synthe...
Datasheet PDF File LMX2512 PDF File

LMX2512
LMX2512

Overview
LMX2502/LMX2512 Frequency Synthesizer System with Integrated VCO June 2003 LMX2502/LMX2512 PLLatinum™ Frequency Synthesizer System with Integrated VCO General Description LMX2502 and LMX2512 are highly integrated, high performance, low power frequency synthesizer systems optimized for Korean PCS and Korean Cellular CDMA (1xRTT, IS-95) mobile handsets.
Using a proprietary digital phase locked loop technique, LMX2502 and LMX2512 generate very stable, low noise local oscillator signals for up and down conversion in wireless communications devices.
LMX2502 and LMX2512 include a voltage controlled oscillator (VCO), a loop filter, and a fractional-N RF PLL based on a delta sigma modulator.
In concert these blocks form a closed loop RF synthesizer system.
LMX2502 supports the Korean PCS band and LMX2512 supports the Korean Cellular band.
LMX2502 and LMX2512 include an Integer-N IF PLL also.
For more flexible loop filter designs, the IF PLL includes a 4-level programmable charge pump.
Togeth...


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