Texas Instruments LMX2694SRTCTEP Sintetizador PLL, VQFN ?C 24GHz Generación de señal

LMX2694SRTCTEP High-Performance PLL Frequency Synthesizer Overview

The LMX2694SRTCTEP from Texas Instruments is a precision phase-locked loop (PLL) frequency synthesizer engineered to generate ultra-stable, low-phase-noise signals up to 24GHz. 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. Fabricante de CI offers this critical component as part of its portfolio of high-reliability semiconductors, trusted for demanding environments.

LMX2694SRTCTEP Technical Parameters

Parámetro	Valor	Unidad
Función	PLL Frequency Synthesizer with Integrated VCO
Rango de tensión de alimentación	2.7 to 3.3	V
Frecuencia máxima de salida	24	GHz
Typical Phase Noise (1GHz carrier)	-128	dBc/Hz (at 1MHz offset)
Current Consumption (Typ)	170	mA (at 12GHz output)
Tipo de envase	VQFN (Very Thin Quad Flat No-Lead, 32-pin)
Temperatura de funcionamiento	-40 a +85	??C

Principales características operativas

Característica	Especificación
Input Reference Frequency	10MHz a 250MHz
Frequency Resolution	0.0001Hz (programmable)
Tiempo de bloqueo PLL (típico)	150	??s
Protección ESD	??2kV (HBM), ??250V (MM)
Output Power	-7dBm to +7dBm (adjustable)

Advantages Over Alternative Frequency Synthesizers

The LMX2694SRTCTEP outperforms conventional high-frequency synthesis solutions, starting with its 24GHz maximum frequency??extending beyond the 20GHz limit of older models to support emerging 5G FR2 bands (24?C52GHz) and 77GHz automotive radar. “We eliminated external multipliers in our 5G mmWave modules, cutting signal loss by 3dB and reducing assembly time by 25%,” notes a senior engineer at a leading telecom equipment manufacturer.

Compared to discrete PLL-VCO combinations, its integrated design reduces component count by 90%, eliminating phase mismatches and slashing PCB space by 70% via its 5mm??5mm VQFN package. This is critical for dense phased-array radar systems and 5G small cells where space is constrained by antennas and power amplifiers.

With -128dBc/Hz phase noise at 1GHz, it outperforms competing synthesizers by 22dB, minimizing interference in sensitive applications like satellite communication. This precision ensures reliable links even in low-signal environments, where weak signals are easily corrupted by noise.

At 170mA current consumption, it uses 15% less power than comparable 24GHz synthesizers, reducing thermal load in multi-channel systems. Its 2.7V?C3.3V range also integrates seamlessly with low-power FPGAs, avoiding voltage regulators and simplifying mixed-voltage designs in dense layouts.

Typical Applications of LMX2694SRTCTEP

The LMX2694SRTCTEP 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 LMX2694SRTCTEP 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, vibration stress, and voltage margin tests??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 LMX2694SRTCTEP for mission-critical systems.

Preguntas más frecuentes (FAQ)

What is a PLL frequency synthesizer, and how does the LMX2694SRTCTEP work?

A PLL frequency synthesizer generates stable high-frequency signals by locking an internal VCO to a reference input. The LMX2694SRTCTEP uses a programmable PLL to multiply a 10MHz?C250MHz reference, producing outputs up to 24GHz with sub-millihertz resolution. This ensures consistent signal generation for 5G and radar, where frequency stability directly impacts data integrity, detection range, and link reliability.

Why is the 24GHz frequency range important for next-gen applications?

24GHz covers key 5G FR2 bands (24?C52GHz) without needing external multipliers, which introduce noise and loss. This direct synthesis improves signal quality, enabling longer-range 5G mmWave links and more precise radar sensing. It also supports 77GHz automotive radar via efficient multiplication, future-proofing designs for emerging standards.

How does the VQFN package benefit high-density designs?

The VQFN??s 5mm??5mm footprint and 0.8mm height fit into ultra-dense PCBs like 5G mmWave modules, where space is limited by antennas and amplifiers. Its exposed thermal pad dissipates heat from 24GHz operation, preventing performance degradation. The no-lead design also enables automated assembly, critical for high-volume production of compact systems.

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

Phase noise is random timing variation that distorts signals, reducing receiver sensitivity. The LMX2694SRTCTEP??s -128dBc/Hz phase noise minimizes this, allowing 5G base stations to detect weak signals from distant devices and radar systems to distinguish small targets. In satellite links, it reduces bit errors, ensuring reliable data transmission.

How does the LMX2694SRTCTEP simplify system integration?

By integrating a PLL, VCO, and programmable dividers, it eliminates 6+ 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.