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TI unveils industry's lowest phase noise frequency synthesizer



        TI unveils industry's lowest phase noise frequency synthesizer

Synthesizer with integrated VCO outputs 50 to 3760 MHz, supports wide range of
applications

PR Newswire

DALLAS, Jan. 21, 2013

DALLAS, Jan. 21, 2013 /PRNewswire/ -- Texas Instruments Incorporated (TI)
(NASDAQ: TXN) today introduced a wideband frequency synthesizer with
integrated voltage-controlled oscillator (VCO) that delivers the industry's
lowest phase noise. Its combination of ultra-low noise phase-locked loop (PLL)
and industry's highest phase detector frequency outperforms the competition in
both phase noise and spurs. The LMX2581 combines the capability to drive
highest system performance along with the flexibility of a wideband frequency
synthesizer that outputs 50 to 3760 MHz. It allows designers to use one
frequency synthesizer to support a variety of demanding applications in
wireless infrastructure, radar, medical imaging, defense and aerospace, and
test and measurement. For more information and to order samples, visit
www.ti.com/lmx2581-pr. 

In addition, the LMX2581 improves total link power efficiency and
communication channel capacity when combined with the following high-speed
analog signal chain devices from TI: LMK04828 or LMK04800 clock jitter
cleaner; AD42JB69 dual-channel, 16-bit, 250-MSPS analog-to-digital converter
(ADC) with JESD204B serial interface or ADC16DV160 dual-channel, 16-bit,
160-MSPS ADC; DAC34SH84 quad-channel, 16-bit, 1.5-GSPS digital-to-analog
converter (DAC), and the TRF3705 300-MHz to 4-GHz quadrature modulator.

Key features and benefits of the LMX2581

  o Industry's best phase noise improves RF sensitivity: Phase detector
    frequency of 200 MHz and ultra-low PLL normalized phase noise of -229
    dBc/Hz provides a precision local oscillator to an RF front end for better
    receiver sensitivity.
  o Multi-core VCO provides maximum flexibility: Integrated VCOs allow the
    device to output frequencies from 50 MHz to 3760 MHz, eliminating the
    multiple VCO/PLL combinations typically required to support a broad range
    of applications. The LMX2581 also gives designers the option to bypass its
    internal multi-core VCO in favor of an external VCO.
  o Low fractional spurs for high RF spectral purity: Delta-sigma PLLatinum™
    PLL engine with 200-MHz phase detector frequency boosts spurious
    performance.
  o Integration reduces bill of materials (BOM) costs: Ultra-low noise,
    wideband frequency synthesizer integrates a delta-sigma fractional-N PLL;
    a multi-core VCO with tank circuit; optional frequency divider; two
    differential RF output buffers that can deliver 10 dBm single-ended on
    each side; and several low-noise, high precision low dropout regulators
    (LDOs).

Tools and support  
The LMX2581EVAL evaluation module can be purchased today for US$175. The
synthesizer's companion Clock Design Tool  and CodeLoader software help speed
system design by aiding engineers with product selection, loop filter design
and simulation of timing solutions. Both of these tools and other clock design
software are available in the WEBENCH® Design Center. Support is available on
the Clocks & Timers Forum in the TI E2E^TM Community, where engineers can ask
questions and get answers from TI experts.

Availability, packaging and pricing   
The LMX2581 is available today in a 32-pin, 5-mm x 5-mm QFN package for a
suggested retail price of US$7.00 in 1,000-unit quantities.

Learn more about TI's RF synthesizers portfolio by visiting the links below:

  o Request samples, purchase EVMs: www.ti.com/lmx2581s-pr.  
  o Download the LMX2581 data sheet: www.ti.com/lmx2581ds-pr
  o View a remote radio unit system block diagram: www.ti.com/rrusbd-pr.  
  o View a software-defined radio system block diagram: www.ti.com/sdrsbd-pr.
  o View a wireless repeater block diagram: www.ti.com/repeatersbd-pr.
  o View a communications tester system block diagram:
    www.ti.com/testersbd-pr.   

About Texas Instruments  
Texas Instruments semiconductor innovations help 90,000 customers unlock the
possibilities of the world as it could be – smarter, safer, greener, healthier
and more fun. Our commitment to building a better future is ingrained in
everything we do – from the responsible manufacturing of our semiconductors,
to caring for our employees, to giving back inside our communities. This is
just the beginning of our story. Learn more at www.ti.com.

Trademarks   
WEBENCH is a registered trademark, and TI E2E and PLLatinum are trademarks of
Texas Instruments. All other trademarks and registered trademarks belong to
their respective owners.

SOURCE Texas Instruments Incorporated

Website: http://www.ti.com
Contact: Mark Alden, Texas Instruments, +1-408-721-6929, mark.alden@ti.com,
Vicky Smithee GolinHarris, +1-972-341-2537, vsmithee@golinharris.com
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