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LMX2531LQ1500E

Part Number	LMX2531LQ1500E
Manufacturer	National Semiconductor
Description	High Performance Frequency Synthesizer System
Published	Jan 5, 2007
Detailed Description	www.DataSheet4U.com LMX2531LQ1500E High Performance Frequency Synthesizer System with Integrated VCO October 2006 LMX...
Datasheet	LMX2531LQ1500E PDF File

Overview

www.
DataSheet4U.
com LMX2531LQ1500E High Performance Frequency Synthesizer System with Integrated VCO October 2006 LMX2531LQ1500E High Performance Frequency Synthesizer System with Integrated VCO General Description The LMX2531LQ1500E is a low power, high performance frequency synthesizer system which includes a fully integrated delta-sigma PLL and VCO with fully integrated tank circuit.
The third and fourth poles are also integrated and also adjustable.
Also included are integrated ultra-low noise and high precision LDOs for the PLL and VCO which give higher supply noise immunity and also more consistent performance.
When combined with a high quality reference oscillator, the LMX2531LQ1500E generates very stable, low noise local oscillator signals for up and down conversion in wireless communication devices.
The LMX2531LQ1500E is a monolithic integrated circuit, fabricated in an advanced BiCMOS process.
There are several different versions of this product in order to accomdate different frequency bands.
Device programming is facilitated using a three-wire MICROWIRE Interface that can operate down to 1.
8 volts.
Supply voltage range is 2.
8 to 3.
2 Volts.
The LMX2531LQ1500E is available in a 36 pin 6x6x0.
8 mm Lead-Free Leadless Leadframe Package (LLP).
Features PLL Features — Fractional-N Delta Sigma Modulator Order programmable up to 4th order — FastLock/Cycle Slip Reduction with Timeout Counter — Partially integrated, adjustable Loop Filter — Very low phase noise and spurs VCO Features — Integrated tank inductor — Low phase noise — 1499 - 1510 MHz Output Frequency — 749.
5 - 755 MHz Output Frequency (Divide by 2 Mode) Other Features — 2.
8 V to 3.
2 V Operation — Low Power-Down Current — 1.
8V MICROWIRE Support — Package: 36 Lead LLP Target Applications n Data Converting Clocking © 2006 National Semiconductor Corporation DS201950 www.
national.
com LMX2531LQ1500E Functional Block Diagram 20195001 www.
national.
com 2 LMX2531LQ1500E Connection Diagram 20195002 ...

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LMX2531LQ1500E High Performance Frequency Synthesizer System - National Semiconductor

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