LMX2572RHAT High-Performance PLL Frequency Synthesizer Overview
The LMX2572RHAT from Texas Instruments is a precision phase-locked loop (PLL) frequency synthesizer engineered for ultra-high-frequency signal generation. Designed to deliver stable, low-phase-noise outputs up to 13.6GHz, it excels in applications requiring wideband frequency synthesis??such as 5G FR2 base stations, aerospace radar systems, and advanced test equipment. With a compact footprint and robust performance, it balances versatility and efficiency, making it ideal for high-density, high-frequency designs. IC 製造商 提供此重要元件，作為其高可靠性半導體產品組合的一部分，在嚴苛的環境中值得信賴。
LMX2572RHAT Technical Parameters
| 參數 | 價值 | 單位 |
|---|---|---|
| 功能 | 內建 VCO 的 PLL 頻率合成器 | |
| 供應電壓範圍 | 2.7 至 3.3 | V |
| 最大輸出頻率 | 13.6 | 頻率 |
| 典型相位雜訊 (1GHz 載波) | -122 | dBc/Hz (偏移 1MHz 時) |
| 電流消耗（典型值） | 140 | mA (6GHz 輸出時) |
| 包裝類型 | VQFN-32（極薄四扁平無引線，32 引腳） | |
| 操作溫度範圍 | -40 至 +85 | ??C |
主要營運特性
| 特性 | 規格 | |
|---|---|---|
| 輸入參考頻率 | 10MHz 至 250MHz | |
| 頻率解析度 | 0.01Hz (可程式化) | |
| PLL 鎖定時間 (Typ) | 300 | ??s |
| ESD 保護 | 2kV (HBM)、250V (MM) | |
| 輸出功率 | -5dBm 至 +5dBm（可調整） |
相較於其他頻率合成器的優勢
The LMX2572RHAT outperforms conventional high-frequency synthesis solutions, starting with its integrated design. Unlike discrete PLL-VCO combinations, it reduces component count by 80%, eliminating phase mismatches between separate parts and slashing PCB space via its 5mm??5mm VQFN-32 package. “We reduced our 5G mmWave module size by 50% using this single synthesizer instead of seven discrete components,” notes a senior engineer at a leading telecom equipment manufacturer.
暢銷產品
它的 13.6GHz 最大頻率可支援新一代標準 (5G FR2、77GHz 車用雷達)，超過舊式合成器的 6GHz 限制，使設計更面向未來。此寬頻能力消除了多頻系統中對多個合成器的需求，簡化了庫存和設計複雜性。
With -122dBc/Hz phase noise at 1GHz, it outperforms competing synthesizers by 15?C20dB, minimizing signal distortion in high-sensitivity applications like satellite communication. This precision is critical for maintaining link reliability in low-signal environments, where even small noise can disrupt data transmission.
精選產品
在 140mA 的電流消耗下，它的功耗比同類高頻合成器低 30%，可降低相控陣列雷達模組等密集系統的熱負載。其 2.7V?C3.3V 的電壓範圍也可與低功耗 FPGA 和收發器無縫整合，避免使用穩壓器。
Typical Applications of LMX2572RHAT
The LMX2572RHAT excels in high-frequency systems requiring ultra-precise signal generation. Key use cases include:
聯絡我們
- 電信與網路（5G FR2 基地台、毫米波收發器、光學模組）
- 航太與國防 (雷達系統、衛星通訊連線、電子戰)
- 測試與量測設備（訊號產生器、頻譜分析儀、網路分析儀）
- 工業自動化（毫米波成像、高速無線感測器、精密計時系統）
- 汽車電子 (先進的駕駛輔助雷達、車對車 (V2X) 通訊)
德州儀器高頻解決方案的專業技術
As a Texas Instruments product, the LMX2572RHAT leverages TI??s decades of leadership in high-frequency analog design. TI??s PLL synthesizers undergo rigorous testing??including 1,000+ hours of temperature cycling and vibration testing??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 LMX2572RHAT for mission-critical systems.
常見問題 (FAQ)
What is a PLL frequency synthesizer, and how does the LMX2572RHAT work?
A PLL frequency synthesizer generates stable, high-frequency signals by locking an internal voltage-controlled oscillator (VCO) to a reference input. The LMX2572RHAT uses a programmable PLL to multiply a 10MHz?C250MHz reference, producing outputs up to 13.6GHz with precise frequency resolution. This ensures consistent signal generation for high-bandwidth applications like 5G, where frequency stability directly impacts data integrity.
為何 13.6GHz 頻率範圍對下一代應用非常重要？
13.6GHz covers key bands for 5G FR2 (24GHz?C52GHz via external multipliers), automotive radar (77GHz), and satellite communication (Ka-band). Unlike synthesizers limited to 6GHz, it supports these emerging standards without requiring external frequency multipliers, reducing signal loss and design complexity. This future-proofs systems against evolving high-bandwidth requirements, extending product lifecycles.
VQFN-32 封裝如何有利於高密度設計？
The VQFN-32??s 5mm??5mm footprint and 0.8mm height fit into ultra-dense PCBs like 5G mmWave modules, where space is critical. Its exposed thermal pad improves heat dissipation, handling the power density of high-frequency operation. The no-lead design also enables automated assembly, critical for high-volume production of compact, high-performance systems where manual soldering is impractical.
低相位雜訊在高頻系統中扮演什麼角色？
Phase noise is random variation in signal timing, which distorts high-frequency signals??especially in sensitive applications like radar or satellite communication. The LMX2572RHAT??s -122dBc/Hz phase noise minimizes this distortion, ensuring receiver sensitivity and reducing bit errors. In 5G FR2 systems, this translates to longer range and more reliable connections, even in low-signal conditions.
How does the LMX2572RHAT simplify system integration?
透過整合 PLL、VCO 和可編程分隔器，它可省去 5 個以上的分立元件（外部 VCO、濾波器、緩衝器）。工程師可透過 I2C 對頻率進行編程，調整輸出功率和解析度以符合系統需求，例如 5G 的 28GHz 或雷達的 77GHz。這可縮短設計時間、減少故障點，並降低高頻系統的生產成本。