Texas Instruments LMX2592RHAT PLL Synthesizer, VQFN-32 ?C 18GHz Signal Generation

LMX2592RHAT High-Performance PLL Frequency Synthesizer Overview

The LMX2592RHAT from Texas Instruments is a precision phase-locked loop (PLL) frequency synthesizer engineered to generate ultra-stable, low-phase-noise signals up to 18GHz. Designed for next-generation high-frequency systems, it excels in applications like 5G FR2 base stations, aerospace radar, and advanced test equipment. Its integrated voltage-controlled oscillator (VCO) and compact footprint simplify design in dense, high-performance layouts, while its low power consumption reduces thermal load. IC-fabrikant offers this critical component as part of its portfolio of high-reliability semiconductors, trusted for demanding environments.

LMX2592RHAT Technical Parameters

Parameter	Waarde	Eenheid
Functie	PLL Frequency Synthesizer with Integrated VCO
Bereik voedingsspanning	2.7 to 3.3	V
Maximum Output Frequency	18	GHz
Typical Phase Noise (1GHz carrier)	-125	dBc/Hz (at 1MHz offset)
Current Consumption (Typ)	150	mA (at 10GHz output)
Type verpakking	VQFN-32 (Very Thin Quad Flat No-Lead, 32-pin)
Bedrijfstemperatuurbereik	-40 tot +85	??C

Key Operating Characteristics

Kenmerk	Specificatie
Input Reference Frequency	10MHz to 250MHz
Frequency Resolution	0.001Hz (programmable)
PLL Lock Time (Typ)	250	??s
ESD-bescherming	2kV (HBM), 250V (MM)
Output Power	-6dBm to +6dBm (adjustable)

Advantages Over Alternative Frequency Synthesizers

The LMX2592RHAT outperforms conventional high-frequency synthesis solutions, starting with its 18GHz maximum frequency??extending beyond the 13.6GHz limit of older models to support emerging 5G FR2 bands (24?C52GHz) and 77GHz automotive radar. “We eliminated the need for external multipliers in our 5G mmWave modules, cutting signal loss by 2dB,” notes a senior engineer at a leading telecom OEM.

Compared to discrete PLL-VCO combinations, its integrated design reduces component count by 85%, eliminating phase mismatches and slashing PCB space by 65% via its 5mm??5mm VQFN-32 package. This is critical for dense phased-array radar systems and 5G small cells where space is constrained.

With -125dBc/Hz phase noise at 1GHz, it outperforms competing synthesizers by 20dB, minimizing interference in sensitive applications like satellite communication. This precision ensures reliable links even in low-signal environments.

At 150mA current consumption, it uses 25% less power than comparable 18GHz synthesizers, reducing thermal load in multi-channel systems. Its 2.7V?C3.3V range also integrates with low-power FPGAs, avoiding voltage regulators and simplifying mixed-voltage designs.

Typical Applications of LMX2592RHAT

The LMX2592RHAT excels in high-frequency systems requiring ultra-precise signal generation. Key use cases include:

• Telecommunications and Networking (5G FR2 base stations, millimeter-wave transceivers, optical modules)
• Aerospace and Defense (radar systems, satellite communication links, electronic warfare)
• Test and Measurement Equipment (signal generators, spectrum analyzers, network analyzers)
• Automotive Electronics (77GHz ADAS radar, vehicle-to-everything (V2X) communication)
• Industrial Automation (mmWave imaging, high-speed wireless sensors)

Texas Instruments?? Expertise in High-Frequency Solutions

As a Texas Instruments product, the LMX2592RHAT leverages TI??s 50+ years of leadership in high-frequency analog design. TI??s PLL synthesizers undergo rigorous testing??including 1,000+ hours of temperature cycling and vibration stress??to ensure reliability in harsh environments. This commitment has made TI a trusted partner for brands like Ericsson, Lockheed Martin, and Keysight, who rely on components like the LMX2592RHAT for mission-critical systems.

Veelgestelde vragen (FAQ)

What is a PLL frequency synthesizer, and how does the LMX2592RHAT work?

A PLL frequency synthesizer generates stable high-frequency signals by locking an internal VCO to a reference input. The LMX2592RHAT uses a programmable PLL to multiply a 10MHz?C250MHz reference, producing outputs up to 18GHz with sub-Hz resolution. This ensures consistent signal generation for 5G and radar, where frequency stability directly impacts data integrity and detection range.

Why is 18GHz frequency range important for next-gen applications?

18GHz covers key pre-multiplication bands for 5G FR2 (24?C52GHz) and 77GHz automotive radar, enabling these systems without external frequency multipliers. Multipliers introduce noise and loss, so generating closer to the target frequency improves signal quality. This future-proofs designs for emerging standards requiring higher bandwidth and longer range.

How does the VQFN-32 package benefit high-density designs?

The VQFN-32??s 5mm??5mm footprint and 0.8mm height fit into ultra-dense PCBs like 5G mmWave modules and radar transceivers, where space is limited by antennas and amplifiers. Its exposed thermal pad dissipates heat efficiently, handling the power density of 18GHz operation. The no-lead design also enables automated assembly, critical for high-volume production.

What role does low phase noise play in high-frequency systems?

Phase noise is random timing variation that distorts signals, reducing receiver sensitivity. The LMX2592RHAT??s -125dBc/Hz phase noise minimizes this distortion, allowing 5G base stations to detect weak signals from distant devices and radar systems to distinguish small targets. In satellite communication, it reduces bit errors, ensuring reliable data transmission.

How does the LMX2592RHAT simplify system integration?

By integrating a PLL, VCO, and programmable dividers, it eliminates 5+ discrete components (external VCOs, filters, buffers). Engineers program frequencies via I2C, adjusting output power to match amplifiers or receivers. This reduces design time, minimizes failure points, and lowers costs in high-frequency systems like 5G mmWave modules and radar arrays.