LMX2492RTWR

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2492RTWR is a high-performance, low-noise fractional-N phase-locked loop (PLL) frequency synthesizer manufactured by Texas Instruments. It operates within an output frequency range of 500 MHz to 14 GHz and supports a wide input frequency range from 500 MHz to 6.4 GHz. The device utilizes Silicon Bipolar technology and features integrated ramp/chirp generation capabilities for direct modulation support. It is housed in a compact WQFN-24 surface-mount package designed for space-constrained applications. The component requires a supply voltage between 3.15 V and 3.45 V and is rated for operation across a temperature range of -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrated ramp and chirp generation functionality enabling direct FSK and PSK modulation without external processors.
• Low noise floor performance optimized for demanding radar and communication systems requiring precise frequency synthesis.
• Supports programmable charge pump and high-speed phase detector frequencies up to 200 MHz for rapid settling times.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Automotive radar systems operating at millimeter-wave frequencies.
• Point-to-point wireless communication links requiring stable local oscillators.
• Test and measurement equipment needing low-phase-noise signal sources.

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'RTWR' against the manufacturer's current datasheet to confirm the tape-and-reel packaging configuration and standard commercial grade temperature rating. Ensure that the ordering information matches the exact pinout and electrical specifications required for the target PCB design before finalizing procurement orders.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when an output frequency extending up to 14 GHz is required alongside integrated modulation capabilities. Compare against the LMX2491 if the application only requires frequencies up to 6.4 GHz, as the LMX2492 offers extended bandwidth. Confirm that the system power supply can maintain the specified 3.15 V to 3.45 V range to ensure optimal phase noise performance.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the LMX249x family of wideband PLLs from Texas Instruments, which are engineered for high-frequency RF applications. The LMX2492 variant specifically targets the upper end of the Ku/Ka-band spectrum compared to its lower-frequency counterparts. It serves as a critical clock source and frequency synthesizer in modern electronic systems where spectral purity and fast switching speeds are mandatory.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The LMX2492EVM is an evaluation module, not a direct replacement. For functional equivalents, consider the LMX2492QRTWRQ1 for automotive qualification or the LMX2491RTWR if the 14 GHz maximum output is unnecessary. Verify pin compatibility and register settings before substituting.