January 25th, Texas Instruments (TI) announced today the introduction of a wideband frequency synthesizer that offers the industry's lowest phase noise and an integrated voltage-controlled oscillator (VCO). The product integrates an ultra-low noise phase-locked loop (PLL) and the industry's highest phase detector frequency, with phase noise and spurious performance superior to competing products. The LMX2581 can drive the highest system performance and has a wideband frequency synthesizer with an output frequency between 50 to 3760 MHz for high flexibility. Designers can use this frequency synthesizer to meet a variety of demanding applications, including wireless infrastructure, radar, medical imaging, defense and aerospace, and measurement testing. For more details or to apply for samples.

In addition, the LMX2581 can significantly improve overall link power efficiency and communication channel capacity when combined with the following TI high-speed analog signal chain devices: LMK04828 or LMK04800 clock jitter cleaner, ADS42JB69 dual channel 16-bit 250MSPS module supporting JESD204B serial interface Digital to Digital Converter (ADC) or ADC16DV160 Dual 16-bit 160MSPS ADC, DAC34SH84 Quad 16-bit 1.5GSPS Digital-to-Analog Converter (DAC), and TRF3705 300MHz to 4GHz Quadrature Modulator.
The main features and advantages of LMX2581:
Industry's Best Phase Noise Improves RF Sensitivity: 200 MHz Phase Detector Frequency with -229 dBc/Hz Ultra-Low PLL Standardized phase noise provides a high-precision local oscillator for the RF front end, improving receiver sensitivity; multi-core VCOs provide maximum flexibility Sex: The integrated VCO enables the device's output frequency to reach 50 MHz to 3760 MHz, enabling a variety of applications without the need for traditional multiple VCO/PLL combinations. In addition, the LMX2581 offers designers more options to bypass the internal multi-core VCO with an external VCO; • Fractional spurs for high RF spectral purity: ∑ types that provide 200 MHz phase detector frequency The PLLatinum PLL engine improves spurious performance; • High integration reduces bill of materials (BOM) costs: Ultra-low noise wideband frequency synthesizers are highly integrated ∑ Fractional-N PLLs, multicore VCOs that support tank circuits, and selectable dividers The two differential RF output buffers on each side support 10 dBm single-ended, as well as several low-noise high-precision low-dropout regulators (LDOs).
Tools and Support The LMX2581EVAL Evaluation Board is now available for immediate purchase. The synthesizer's companion tool clock design tools and CodeLoader software provide engineers with product selection, loop filter design, and timing solution simulation help to accelerate the system design process. Both tools and other clock design software are available at WEBENCH Design Center. The TI E2ETM community's Clock & Timer Forum provides engineers with technical support, where they can ask TI experts for questions.
Availability and packaging The LMX2581 is available now in a 32-pin, 5mm x 5mm QFN package.

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