LMX2581ESQX/NOPB

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The LMX2581ESQX/NOPB is a highly integrated fractional-N/integer-N synthesizer with extensive digital control, ideal for a wide variety of clock/timing applications. It leverages the latest Digital Phase-Locked Loop (DPLL) technology to provide complete automation for clock/timing synthesis. The device is feature-rich and capable of producing any frequency from below 10 MHz to well beyond 4.0 GHz.

The LMX2581ESQX/NOPB integrates dual PLLs, pdXY specific control, and an extensive array of programmable features tailored to yield robust frequency synthesis performance in a low power, small footprint package. Its PLLs offer twofold frequency synthesis through a combination of multi-modulus dividers and digital compensators. Its output spectrum is very clean, allowing for crystal clear audio and video capture when generating timing for digital signal processing systems.

The fractional-N/integer-N synthesizer design of the LMX2581ESQX/NOPB offers several advantages over traditional oscillators:

• Accurate and fast frequency programming
• High frequency resolution
• Low phase noise
• Reduced power consumption
• Exceptional accuracy over wide frequency range

The LMX2581ESQX/NOPB is ideal for applications such as base stations, wireless infrastructure, servers, and network timing applications. It supports a variety of reference clocks, including crystal oscillator (XO), Voltage Controlled Crystal Oscillator (VCXO), Network Time Protocol (NTP), and Phase Locked Loop (PLL). It also features bandgap voltage reference technology, which significantly reduces start-up time.

The synthesizer is easily incorporated into systems and applications thanks to its flexible programming interface. A comprehensive set of I2C and SPI controls allow for dynamic adjustability of the output frequency, speed, and power, enabling a robust and reliable clock and timing solution for a variety of applications.

The core of the LMX2581ESQX/NOPB is its Digital Phase-Locked Loop (DPLL) system, which is the heart of any digital frequency synthesizer. The DPLL system contains a digital controller and an analog loop filter, which together form a closed-loop system. The analog loop filter plays a key role in the DPLL system, as it must be able to accurately detect signals and respond to input frequency changes with minimal noise. The LMX2581ESQX/NOPB features an advanced analog loop filter design, which allows for a noise-free frequency output on a wide variety of clock/timing sources.

The device offers both an Integer-N and a Fractional-N synthesis, allowing the system to generate an extremely accurate and clean output clock frequency. By using the Fractional-N synthesis, the output frequency can be made even more precise with very low phase noise. The device\'s PLL also supports VCO auto-calibration functionality, which enables it to automatically adjust the VCO frequency response to achieve optimal performance.

The LMX2581ESQX/NOPB is a powerful, highly integrated clock/timing solution for a variety of applications. Its fractional-N/integer-N synthesizer technology, advanced control interface, low power consumption, and small footprint make it the ideal choice for any clock/timing application.

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