LMX2487ESQE/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2487ESQE/NOPB is a high-performance, low-power dual PLLatinum frequency synthesizer manufactured by Texas Instruments. It features a delta-sigma architecture with an integrated VCO and supports output frequencies from 3 GHz to 7.5 GHz. The device includes a 3-GHz integer PLL for reference synthesis and operates on a single supply voltage between 2.5 V and 3.6 V. Designed for wireless applications, it offers low phase noise and spurious performance in a compact 24-pin WQFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual PLLatinum architecture with integrated VCO covering 3 GHz to 7.5 GHz
• Delta-sigma fractional-N synthesis with low power consumption (5.7 mA typical)
• Integrated 3-GHz integer PLL for reference signal generation
• CMOS digital interface compatible with standard SPI protocols

Clock Generators, PLLs, Frequency Synthesizers Applications

• Wireless LAN infrastructure equipment
• Point-to-point microwave radio systems
• Test and measurement instrumentation
• Satellite communication ground stations

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the specific suffix 'ESQE' against current TI datasheets to ensure correct temperature grade and packaging specifications. Check for updated revision history or obsolescence notices prior to procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when high-frequency synthesis up to 7.5 GHz is required with low power constraints. Compare against the LMX2487E variant if lower maximum frequency operation suffices. Ensure the design accommodates the 24-WQFN thermal pad requirements for adequate heat dissipation during continuous operation.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the LMX2487 family of dual PLLatinum synthesizers. It represents an evolution of earlier National Semiconductor designs now maintained under Texas Instruments. The device integrates both fractional-N and integer-N loops to optimize phase noise and spur performance across wide tuning ranges.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The LMX2487ESQ/NOPB serves as a direct functional replacement for the LMX2487ESQE/NOPB. Verify pinout compatibility and register settings when substituting between these variants.