LMX2310USLDX/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2310USLDX/NOPB is a fractional-N frequency synthesizer manufactured by Texas Instruments, designed for wireless communication applications. It integrates a low-phase-noise VCO, dual-modulus prescaler, and programmable dividers within a compact USON package. The device supports frequencies up to 6 GHz with a reference input range of 5 MHz to 200 MHz. Key electrical parameters include a phase noise of -148 dBc/Hz at 6 MHz offset and a supply voltage range of 2.7 V to 3.6 V. It features an integrated charge pump with adjustable current and operates over an industrial temperature range of -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates a low-phase-noise voltage-controlled oscillator (VCO) optimized for minimal jitter performance in wireless systems.
• Supports fractional-N synthesis architecture enabling high-resolution frequency steps without compromising loop bandwidth.
• Includes an on-chip charge pump with programmable current settings to optimize lock time and phase noise characteristics.
• Features a compact USON surface-mount package suitable for space-constrained mobile and portable devices.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Wireless LAN (WLAN) transceivers requiring precise frequency synthesis.
• Bluetooth and Zigbee modules needing low-power, low-jitter clock sources.
• Mobile phone RF front-ends utilizing GSM, EDGE, or UMTS bands.
• Personal Digital Assistants (PDAs) and smartphones with integrated radio functionality.

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'USLDX' against the official Texas Instruments datasheet to confirm pinout compatibility and tape-and-reel specifications. Ensure the operating environment remains within the specified -40°C to +85°C range. Cross-reference the EIAJ code and RoHS compliance status directly with the manufacturer's latest documentation before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing systems requiring a fully integrated fractional-N synthesizer with an internal VCO. Compare phase noise performance at specific offsets against external PLL alternatives. Consider the USON package size constraints and verify that the 3.3 V supply rail aligns with the system power budget. Evaluate the reference clock frequency requirements against the 5 MHz to 200 MHz input range.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the LMX2310 family of fractional-N frequency synthesizers from Texas Instruments. It is commonly used in conjunction with other RF components such as mixers and power amplifiers in cellular and WLAN handsets. The device replaces older discrete PLL solutions by integrating the VCO and charge pump, reducing board space and simplifying design complexity for mobile communications.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Check for direct replacements like the LMX2310USLDE/NOPB if different packaging is required. Verify functional equivalence with the LMX2315 series for higher frequency ranges. Consult Texas Instruments application notes for recommended pin-to-pin compatible upgrades within the same product family.