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LMX2485E - High Performance Delta-Sigma Low Power Dual PLLatinum Frequency Synthesizers

Download the LMX2485E datasheet PDF. This datasheet also covers the LMX2485 variant, as both devices belong to the same high performance delta-sigma low power dual pllatinum frequency synthesizers family and are provided as variant models within a single manufacturer datasheet.

Description

The LMX2485 is a low power, high performance delta-sigma fractional-N PLL with an auxiliary integer-N PLL.

The device is fabricated using National Semiconductor’s advanced process.

Features

  • Quadruple Modulus Prescalers for Lower Divide Ratios n RF PLL: 8/9/12/13 or 16/17/20/21 n IF PLL: 8/9 or 16/17 Advanced Delta Sigma Fractional Compensation n 12 bit or 22 bit selectable fractional modulus n Up to 4th order programmable delta-sigma modulator Features for Improved Lock Times and Programming n Fastlock / Cycle slip reduction n Integrated time-out counter n Single word write to change frequencies with Fastlock Wide Operating Range n LMX2485 RF PLL: 500 MHz to 3.0 GHz n LMX2485E RF P.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LMX2485_NationalSemiconductor.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

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Other Datasheets by National Semiconductor (Texas Instruments)

Part Number Description
LMX2485 High Performance Delta-Sigma Low Power Dual PLLatinum Frequency Synthesizers
LMX2486 High Performance Delta-Sigma Low Power Dual PLLatinum Frequency Synthesizers
LMX2487 High Performance Delta-Sigma Low Power Dual PLLatinum Frequency Synthesizers
LMX2487E High Performance Delta-Sigma Low Power Dual PLLatinum Frequency Synthesizers
LMX2411 Baseband Processor

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
www.DataSheet4U.com LMX2485/LMX2485E High Performance Delta-Sigma Low Power Dual PLLatinum Frequency Synthesizer February 2006 LMX2485/LMX2485E 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum™ Frequency Synthesizers with 800 MHz Integer PLL General Description The LMX2485 is a low power, high performance delta-sigma fractional-N PLL with an auxiliary integer-N PLL. The device is fabricated using National Semiconductor’s advanced process. With delta-sigma architecture, fractional spurs at lower offset frequencies are pushed to higher frequencies outside the loop bandwidth. The ability to push close in spur and phase noise energy to higher frequencies is a direct function of the modulator order.
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