LMX2531 High Performance Frequency Synthesizer System with Integrated VCO | TI.com

LMX2531 (ACTIVE)

High Performance Frequency Synthesizer System with Integrated VCO

 

Description

The LMX2531 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 adjustable. Ultra-low noise and high-precision LDOs are integrated for the PLL and VCO, which yield higher supply-noise immunity and more consistent performance. When combined with a high-quality reference oscillator, the LMX2531 device generates very stable, low-noise local-oscillator signals for up and down conversion in wireless communication devices. The LMX2531 device is a monolithic integrated circuit, fabricated in an advanced BiCMOS process. Several different versions of this product accommodate different frequency bands.

Features

  • Multiple Frequency Options Available
    • See Device Information Table
    • Frequencies From: 553 MHz to 3132 MHz
  • PLL Features
    • Fractional-N Delta-Sigma Modulator Order
      Programmable up to Fourth 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
  • Other Features
    • 2.8-V to 3.2-V Operation
    • Low Operating Current
    • Low Power-Down Current
    • 1.8-V MICROWIRE Support
    • 36-Pin 6-mm × 6-mm × 0.8-mm WQFN Package

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Parametrics Compare all products in RF PLLs & synthesizers

 
Output frequency (Min) (MHz)
Output frequency (Max) (MHz)
Normalized PLL phase noise (dBc/Hz)
1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz)
Current consumption (mA)
VCC (V)
Integrated VCO
LMX2531
553    
3132    
-212    
-104    
34    
2.8 to 3.2    
Yes    

Design tool

Design with LMX2531

Recommend Input Frequency Tunable Output Frequency
   
Input Frequency Min Output Frequency
 MHz  MHz
 
Max Output Frequency
 MHz
Channel Spacing
 MHz