LMX2531

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High Performance Frequency Synthesizer System with Integrated VCO

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Product details

Parameters

Integrated VCO Yes Output frequency (Min) (MHz) 553 Output frequency (Max) (MHz) 3132 Normalized PLL phase noise (dBc/Hz) -212 Current consumption (mA) 34 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -104 open-in-new Find other RF PLLs & synthesizers

Package | Pins | Size

WQFN (NJG) 36 36 mm² 6 x 6 WQFN (NJH) 36 36 mm² 6 x 6 open-in-new Find other RF PLLs & synthesizers

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
open-in-new Find other RF PLLs & synthesizers

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.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LMX2531 High-Performance Frequency Synthesizer System With Integrated VCO datasheet (Rev. S) Dec. 31, 2014
User guides LMX2531-xxxx Evaluation Board User’s Guide (Rev. A) Nov. 26, 2013
Application notes AN-1558 Clocking High-Speed A/D Converters (Rev. B) May 01, 2013
Application notes AN-1821 CPRI Repeater System (Rev. A) Apr. 26, 2013
Application notes AN-1879 Fractional N Frequency Synthesis (Rev. A) Apr. 26, 2013
Application notes Selecting Amplifiers, ADCs, and Clocks for High-Performance Signal Paths Sep. 13, 2007
Application notes Generating Precision Clocks for Time- Interleaved ADCs Aug. 02, 2007

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features
  • Low Band 553 - 592 MHz
  • High Band 1106 - 1184 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features
  • Low Band 592 - 634 MHz
  • High Band 1184 - 1268 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features
  • Low Band 634 - 680 MHz
  • High Band 1268 - 1360 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features

Frequency Range:

  • Low Band 749.5 - 755 MHz
  • High Band 1499 - 1510 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features
  • Low Band 725 - 790 MHz
  • High Band 1450 - 1580 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features

Frequency Range

  • Low Band 765 - 818 MHz
  • High Band 1530 - 1636 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features

Frequency Range

  • Low Band 795 - 850 MHz
  • High Band 1590 - 1700 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features

Frequency Range

  • Low Band 831 - 885 MHz
  • High Band 1662 - 1770 MHz

 

EVALUATION BOARDS Download
349
Description

The LMX2531LQ1742 Evaluation Board simplifies evaluation of the LMX2531LQ1742 PLL/VCO synthesizer system. The board enables all performance measurements with no additional support circuitry. The evaluation board consists of a LMX2531LQ1742 device, and a cable assembly. The cable assembly is bundled (...)

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features

Frequency Range

  • Low Band 863 - 920 MHz
  • High Band 1726 - 1840 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features

Frequency Range

  • Low Band 917 - 1014 MHz
  • High Band 1834 - 2028 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)
Features

Frequency Range

  • Low Band 952 - 1137 MHz
  • High Band 1904 - 2274 MHz
EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features

Frequency Range:

  • Low Band 1089 - 1200 MHz
  • High Band 2178 - 2400 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features

Frequency Range

  • Low Band 1168 - 1395 MHz
  • High Band 2336 - 2790 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features
  • Low Band 1355 - 1462 MHz
  • High Band 2710 - 2925 MHz

 

EVALUATION BOARDS Download
349
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 also adjustable. Also included are integrated ultra-low noise and high precision (...)

Features
  • Low Band 1455 - 1566 MHz
  • High Band 2910 - 3132 MHz

 

Software development

APPLICATION SOFTWARE & FRAMEWORKS Download
Clock Design Tool - Loop Filter & Device Configuration + Simulation
CLOCKDESIGNTOOL The Clock Design Tool software helps with part selection, loop filter design and simulation of timing device solutions. When you enter desired output frequencies and a reference frequency (optional), the tool provides TI devices to meet the specified requirements, divider values and a recommended (...)
APPLICATION SOFTWARE & FRAMEWORKS Download
Texas Instruments PLLatinum Simulator Tool
PLLATINUMSIM-SW The PLLATINUMSIM-SW simulator tool lets you create detailed designs and simulations of our PLLATINUM™ integrated circuits which include the LMX series of PLLs and synthesizers.
Features
  • Part selection based on current, cost, phase noise and package
  • Filter design up for passive and active filters up to 4th-order
  • Simulation of phase noise including PLL, fractional engine, voltage-controlled oscillator (VCO), input, dividers, and loop filter
  • Simulation of spurs including phase detector (...)
APPLICATION SOFTWARE & FRAMEWORKS Download
Texas Instruments Clocks and Synthesizers (TICS) Pro Software
TICSPRO-SW The TICS Pro software is used to program the evaluation modules (EVMs) for device numbers with these prefixes: CDC, LMK and LMX. These devices include PLLs and voltage-controlled oscillators (PLL+VCO), synthesizers and clocking devices.
Features
  • Program EVMs through the USB2ANY Interface Adaptor or onboard USB interface.
  • Export programming configurations for use in end application.
IDES, CONFIGURATION, COMPILERS & DEBUGGERS Download
CodeLoader Software for device register programming
CODELOADER The CodeLoader 4 software is used to program the LMX PLLs and LMK timing devices through either the USB or line print terminal (LPT) port of a computer. This software also provides information on how to program the device by showing the bits that are actually sent.


Which software do I use?

Product

Loop (...)

Reference designs

REFERENCE DESIGNS Download
Optimal Clock Sources for GSPS ADCs Reference Design
TIDA-00479 The ADC12D1600RFRB reference design provides a platform to demonstrate a high speed digitizer application which incorporates clocking, power management, and signal processing. The reference design utilizes the 1.6 GSPS ADC12D1600RF device, onboard FPGA Xilinx Virtex 4, and high performance clock (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WQFN (NJG) 36 View options
WQFN (NJH) 36 View options

Ordering & quality

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