LMX2541 Datasheet | National Semiconductor Corporation

LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO .. PRELIMINARY July 2, 2009 Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO General Description The LMX2541 is an ultra low noise frequency synthesizer which integrates a high performance delta-sigma fractional N PLL, a VCO with fully integrated tank circuit, and an optional frequency divider. The PLL offers an unprecedented normalized noise floor of -225 dBc/Hz and can be operated with up to 104 MHz of phase-detector rate (parison frequency) in both integer and fractional modes. The PLL can also be configured to work with an external VCO. The LMX2541 integrates...