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参数

Integrated VCO No Output frequency (Min) (MHz) 1000 Output frequency (Max) (MHz) 4500 Normalized PLL phase noise (dBc/Hz) -210 Current consumption (mA) 5.7 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -104 open-in-new 查找其它 RF PLL 与合成器

封装|引脚|尺寸

WQFN (RTW) 24 16 mm² 4 x 4 open-in-new 查找其它 RF PLL 与合成器

特性

  • Quadruple Modulus Prescaler for Lower Divids
    • RF PLL: 16/17/20/21 or 32/33/36/37
    • IF PLL: 8/9 or 16/17
  • Advanced Delta Sigma Fractional Compensation
    • 12-Bit or 22-Bit Selectable Fractional
      Modulus
    • Up to 4th Order Programmable Delta-Sigma Modulator
  • Improved Lock Times and Programming
    • Fastlock / Cycle Slip Reduction Which Requires
      Only a Single-Word Write
    • Integrated Time-Out Counter
  • Wide Operating Range
    • LMX2486 RF PLL: 1.0 GHz to 4.5 GHz
  • Useful Features
    • Digital Lock Detect Output
    • Hardware and Software Power-Down Control
    • On-Chip Crystal Reference Frequency Doubler
    • RF Phase Detector Frequency Up to 50 MHz
    • 2.5-V to 3.6-V Operation With ICC = 8.5 mA
open-in-new 查找其它 RF PLL 与合成器

描述

The LMX2486 device is a low-power, high performance delta-sigma fractional-N PLL with an auxiliary integer-N PLL. The device is fabricated using TI’s advanced process.

With delta-sigma architecture, fractional spurs at lower offset frequencies are pushed to higher frequencies outside the loop bandwidth. The ability to push close in spur and phase noise energy to higher frequencies is a direct function of the modulator order. Unlike analog compensation, the digital feedback technique used in the LMX2486 is highly resistant to changes in temperature and variations in wafer processing. The LMX2486 delta-sigma modulator is programmable up to fourth order, which allows the designer to select the optimum modulator order to fit the phase noise, spur, and lock time requirements of the system.

Serial data for programming the LMX2486 is transferred through a three-line, high-speed (20-MHz) MICROWIRE interface. The LMX2486 offers fine frequency resolution, low spurs, fast programming speed, and a single-word write to change the frequency. This makes it ideal for direct digital modulation applications, where the N-counter is directly modulated with information. The LMX2486 is available in a 24-lead 4.0 × 4.0 × 0.8 mm WQFN package.

open-in-new 查找其它 RF PLL 与合成器
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技术文档

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类型 标题 下载最新的英文版本 日期
* 数据表 LMX2486 1-GHz to 4.5-GHz High-Performance Delta-Sigma Low-Power Dual PLLatinum Frequency Synthesizers With 3-GHz Integer PLL 数据表 (Rev. B) 2016年 1月 13日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

软件开发

应用软件和框架 下载
时钟设计工具 - 环路滤波器和器件配置 + 仿真
CLOCKDESIGNTOOL The Clock Design Tool software helps with part selection, loop filter design and simulation of timing device solutions. When you enter desired output frequencies and a reference frequency (optional), the tool provides TI devices to meet the specified requirements, divider values and a recommended (...)
应用软件和框架 下载
德州仪器 (TI) PLLatinum 仿真工具
PLLATINUMSIM-SW 利用 PLLatinum Simulator Tool,可进行德州仪器 (TI) LMX 系列的 PLL 和合成器详细设计和仿真。
特性
  • 基于电流、成本、相位噪声和封装的器件选择
  • 针对无源和有源滤波器的滤波器设计(高达 4 级)
  • 相位噪声仿真,包括 PLL、分数引擎、VCO、输入、分频器和环路滤波器
  • 杂散仿真,包括相位检测器和分数。
  • 锁定时间仿真,包括 VCO 数字校准时间
  • 详细波特图仿真
应用软件和框架 下载
德州仪器 (TI) 时钟和合成器 (TICS) Pro 软件
TICSPRO-SW TICS 专业版软件用于对 CDC、LMK 和 LMX 的 EVM 进行编程。这些器件包含 PLL+VCO、合成器和时钟器件。
特性
  • 通过 USB2ANY 或板载 USB 接口对 EVM 进行编程。
  • 导出编程配置以在终端应用中使用。
IDE、配置、编译器或调试器 下载
CodeLoader 器件寄存器编程
CODELOADER The CodeLoader 4 software is used to program the LMX PLLs and LMK timing devices through either the USB or line print terminal (LPT) port of a computer. This software also provides information on how to program the device by showing the bits that are actually sent.


Which software do I use?

Product

Loop (...)

设计工具和仿真

设计工具 下载
Clock tree architect programming software
CLOCK-TREE-ARCHITECT 时钟树架构是一款时钟树综合工具,可根据您的系统要求生成时钟树解决方案,从而帮助您简化设计流程。该工具从庞大的时钟产品数据库中提取数据,然后生成系统级多芯片时钟解决方案。
特性
  • 接受客户特定的设计要求,如输入频率、输出频率、时钟格式和时钟计数
  • 在生成时钟树时考虑各种高级规范,如本底噪声和相位确定性要求
  • 提供清晰且直观的方框图
  • 评估每个产品和系统的关键性能指标(面积、价格、抖动和功率)
  • 生成设计报告(带有指向数据表、培训材料和软件工具的快速链接),以供将来参考

CAD/CAE 符号

封装 引脚 下载
WQFN (RTW) 24 了解详情

订购与质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/FIT 估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

支持与培训

可获得 TI E2E™ 论坛的工程师技术支持

所有内容均由 TI 和社区网友按“原样”提供,并不构成 TI 规范。参阅使用条款

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