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
In addition, the
improves total link power efficiency and communication channel capacity when combined with the following high-speed analog signal chain devices from TI:
clock jitter cleaner;
dual-channel, 16-bit, 250-MSPS analog-to-digital converter (ADC) with JESD204B serial interface or
dual-channel, 16-bit, 160-MSPS ADC;
quad-channel, 16-bit, 1.5-GSPS digital-to-analog converter (DAC), and the
300-MHz to 4-GHz quadrature modulator.
Key features and benefits of the
Tools and support
- 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.
- 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.
- Low fractional spurs for high RF spectral purity: Delta-sigma PLLatinum™ PLL engine with 200-MHz phase detector frequency boosts spurious performance.
- 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).
evaluation module can be purchased today for
. The synthesizer's companion
Clock Design Tool
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
Community, where engineers can ask questions and get answers from TI experts.
Availability, packaging and pricing
is available today in a 32-pin, 5-mm x 5-mm QFN package for a suggested retail price of
in 1,000-unit quantities.
Learn more about TI's
RF synthesizers portfolio
by visiting the links below:
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
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