The LMX2487 device is a low power, high performance delta-sigma fractional-N PLL with an auxiliary integer-N PLL. It 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 LMX2487 is highly resistant to changes in temperature and variations in wafer processing. The LMX2487 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 LMX2487 is transferred through a three-line, high-speed (20-MHz) MICROWIRE interface. The LMX2487 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 LMX2487 is available in a 24-lead 4.0 × 4.0 × 0.8 mm WQFN package.

• Quadruple Modulus Prescaler for Lower Divides
  • 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
  • Fastlock / Cycle Slip Reduction With Single- Word Write to Change Frequencies
  • Integrated Time-Out Counter
• Wide Operating Range
  • LMX2487 RF PLL: 1.0 GHz to 6.0 GHz
• Useful Features
  • Digital Lock Detect Output
  • Hardware and Software Power-Down Control
  • On-Chip Input Frequency Doubler
  • RF Phase Comparison Detector Up to 50 MHz
  • 2.5-V to 3.6-V Operation With ICC = 8.5 mA

• Integrated VCO
• No
• Output frequency (Min) (MHz)
• 1000
• Output frequency (Max) (MHz)
• 6000
• 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

LMX2487的完整型号有：LMX2487SQ/NOPB，以下是这些产品的关键参数及官网采购报价：

LMX2487SQ/NOPB，工作温度：-40 to 85，封装：WQFN (RTW)-24，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LMX2487SQ/NOPB的批量USD价格：1.751（1000+）

CLOCKDESIGNTOOL — 时钟设计工具 - 环路滤波器和器件配置 + 仿真

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 (...)

PLLATINUMSIM-SW — PLLatinum 仿真工具

PLLATINUMSIM-SW 是一款仿真工具，允许用户创建我们 PLLatinum 集成电路的详细设计和仿真，其中包括 LMX 系列锁相环 (PLL) 和合成器。

TICSPRO-SW — 德州仪器 (TI) 时钟和合成器 (TICS) 专业软件

德州仪器 (TI) 时钟和合成器 (TICS) 专业软件用于对具有以下前缀的产品编号的评估模块 (EVM) 进行编程：CDC、LMK 和 LMX。这些产品包括锁相环和电压控制振荡器 (PLL+VCO)、合成器和时钟器件。

CODELOADER — CodeLoader 器件寄存器编程

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

(...)

CLOCK-TREE-ARCHITECT — 时钟树架构编程软件

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。