LMX2485QSQX/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2485QSQX/NOPB is a dual-circuit delta-sigma low-power phase-locked loop frequency synthesizer manufactured by Texas Instruments. It operates within an output frequency range of 500 MHz to 3 GHz, with input frequencies supported from 75 MHz up to 3 GHz. The device functions on a supply voltage between 2.5 V and 3.6 V, drawing a typical operating current of 3.3 mA. Designed for automotive reliability, it holds AEC-Q100 qualification and supports an extended industrial temperature range from -40°C to +85°C. The component is housed in a compact WQFN-24 surface-mount package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual independent PLL circuits integrated into a single low-power package
• Delta-sigma modulation architecture for flexible frequency synthesis
• Automotive-grade qualification ensuring reliability under harsh conditions

Clock Generators, PLLs, Frequency Synthesizers Applications

• Automotive radar systems requiring precise local oscillator signals
• Wireless communication infrastructure components
• Test and measurement equipment needing stable RF sources

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix against official documentation to confirm functional equivalence, as ordering codes may indicate variations in packaging or tape-and-reel specifications. Ensure compatibility with moisture sensitivity levels and reflow soldering profiles during assembly planning. Cross-reference the manufacturer's latest datasheet revision to validate all electrical parameters before finalizing procurement orders.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when dual-channel frequency synthesis is required within a limited board area. The 500 MHz to 3 GHz output range suits mid-band RF applications. Consider the 3.3 mA current consumption relative to system power budgets. Verify that the WQFN-24 thermal performance meets the design requirements for the intended operating environment.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the LMX2485 family of delta-sigma PLLs, designed specifically for low-power wireless and automotive applications. It complements other series members like the LMX2486, which offers higher frequency ranges. The Q suffix denotes automotive grade qualification, distinguishing it from standard commercial variants while maintaining similar pinouts and functionality.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The LMX2486SQ/NOPB serves as a verified substitute offering a wider frequency range of 1 GHz to 4.5 GHz. Both devices share identical WQFN-24 packages and dual-circuit architectures. Designers must verify that the target application does not require frequencies below 500 MHz or above 3 GHz, which would necessitate alternative selection.