LMX2470SLEX/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2470SLEX/NOPB is a dual-loop phase-locked loop (PLL) frequency synthesizer manufactured by Texas Instruments, formerly National Semiconductor. It integrates a 2.6 GHz delta-sigma fractional-N PLL and an 800 MHz integer-N PLL within a single ULGA-24 package. The device operates on a supply voltage ranging from 2.25 V to 2.75 V and supports input frequencies up to 2.6 GHz. It is designed for low power consumption and high performance in wireless communication applications.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates two independent PLL loops: a high-frequency delta-sigma fractional-N PLL and a lower-frequency integer-N PLL.
• Supports direct frequency synthesis without external dividers for simplified system design.
• Features a programmable charge pump and reference divider for flexible clock generation.

Clock Generators, PLLs, Frequency Synthesizers Applications

• RF personal communications systems
• Wireless local area network (WLAN) infrastructure
• Mobile phone base stations

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the manufacturer designation as Texas Instruments, as National Semiconductor was acquired. Confirm the suffix /NOPB indicates lead-free compliance and RoHS adherence. Ensure the package type matches the ULGA-24 specification for proper footprint compatibility during procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a dual-loop architecture is required to generate multiple clock frequencies simultaneously. The delta-sigma modulator offers superior phase noise performance compared to standard fractional-N designs. Consider the 2.6 GHz upper limit for output frequency requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the LMX24xx series of PLLatinum synthesizers. It serves as a successor to earlier National Semiconductor PLL designs, offering improved integration and reduced board space. The device is commonly used in conjunction with voltage-controlled oscillators (VCOs) in RF front-end modules.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

LMX2430SLEX/NOPB is a related dual-loop synthesizer but features different frequency ranges and package options. Verify specific pinout and electrical parameter compatibility before substitution.