LMX2487SQX/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2487SQX/NOPB is a dual PLLatinum frequency synthesizer manufactured by Texas Instruments, utilizing delta-sigma modulation for high-performance frequency synthesis. It integrates two distinct phase-locked loops: a fractional-N loop operating from 3 GHz to 7.5 GHz and an integer-N loop limited to 3 GHz. The device operates on a supply voltage between 2.5 V and 3.6 V with a typical current consumption of 5.7 mA. It is housed in a 24-WQFN package with dimensions of 4x4 mm, designed for surface-mount installation. The component supports CMOS outputs and functions within a temperature range of -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual independent PLL architecture combining a wideband fractional-N synthesizer with a dedicated integer-N synthesizer
• Delta-sigma modulation technology enabling low-power operation while maintaining high spectral purity
• Integrated charge pump and VCO driver stages supporting direct CMOS output interfacing

Clock Generators, PLLs, Frequency Synthesizers Applications

• Wireless infrastructure base station local oscillators
• Point-to-point microwave radio systems
• Test and measurement equipment requiring precise frequency generation

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix configuration against the manufacturer's latest documentation, as ordering codes may indicate variations in packaging or tape-and-reel specifications. Confirm that the requested part number matches the exact electrical characteristics required for the design, particularly regarding the maximum input frequency limits of the integrated loops. Ensure compliance with RoHS directives if applicable to the target market regulations.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a single chip solution is required to generate multiple frequencies across different bands without external mixing. The dual-loop structure allows simultaneous operation of a high-frequency fractional-N channel and a lower-frequency integer-N channel. Consider the 24-WQFN thermal pad requirements for adequate heat dissipation during continuous operation at maximum supply voltages.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This model belongs to the LMX2487E series of low-power dual PLLatinum synthesizers. It shares architectural similarities with the LMX2487ESQ/NOPB but differs in packaging format, typically supplied in reel configurations for automated assembly. The series is designed to replace older discrete solutions in RF front-end designs, offering reduced board space and improved performance consistency.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The LMX2487ESQ/NOPB serves as a functional equivalent within the same family, sharing identical electrical specifications and pinout compatibility. Designers should verify that the alternative package type meets the mechanical constraints of the existing PCB layout before substitution.