LMX2581SQ/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2581SQ/NOPB is a wideband frequency synthesizer featuring an integrated integer voltage-controlled oscillator (VCO), manufactured by Texas Instruments. It operates within a supply voltage range of 3.15 V to 3.45 V and supports a maximum output frequency of 3.76 GHz. The device functions as a clock synthesizer and jitter cleaner, utilizing a single circuit configuration. It is designed for surface mount installation in a 32-WQFN package with dimensions of 5x5 mm and an exposed pad. The component operates reliably across a temperature range from -40°C to +85°C and draws a typical operating current of 135 mA.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates a wideband integer voltage-controlled oscillator (VCO) to minimize external component requirements.
• Functions as both a clock synthesizer and a jitter cleaner for signal conditioning applications.
• Supports differential outputs for improved noise performance in RF systems.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Wireless infrastructure base stations
• Point-to-point microwave radio links
• Test and measurement equipment

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'SQ' indicates automotive-grade qualification when required by design specifications. Confirm the 'NOPB' designation ensures lead-free compliance and RoHS adherence. Ensure the WQFN-32 package footprint matches the PCB layout constraints. Validate that the 3.15 V to 3.45 V supply range aligns with the system power architecture. Check humidity sensitivity levels for proper storage and reflow soldering profiles.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a wide tuning range up to 3.76 GHz is necessary without external VCOs. Consider the 135 mA current consumption against available power budgets. The 32-WQFN package requires adequate thermal management due to the exposed pad design. Verify compatibility with existing SPI or I2C control interfaces used in the target system design.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the LMX2581 family of wideband frequency synthesizers. It shares architectural similarities with other devices in the series but offers specific integration of the integer VCO. The SQ variant denotes enhanced reliability standards compared to standard commercial grades. It serves as a core timing solution for high-frequency RF transmission chains.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The LMX2581SQE/NOPB is a related variant within the same product family. Verify pinout and register compatibility before substitution. Evaluate if the E-grade temperature range meets the application requirements instead of the S-grade specification.