Texas Instruments LMK0482x合成器和抖动清除器

Texas Instruments LMK0482x 超低噪音合成器和抖动清除器是业内性能最高、拥有 JEDEC JESD204B 支持的时钟调理器。来自PLL2的14个时钟输出经过配置可以驱动七个JESD204B转换器或其他使用器件和SYSREF时钟的逻辑器件。通过DC和AC耦合可以提供SYSREF 。不限于 JESD204B 应用,14 个输出中每一个都可以单独配置为传统时钟系统的高性能输出。 它的特征包括可以权衡功耗和性能、双 VCO、动态数字延迟、保持以及无中断模拟延迟的能力。这些功能让LMK0482x系列非常适合提供灵活的高性能时钟树。LMK0482x-EP器件采用金丝键合线,工作温度范围为–55°C至+105°C,具有镀锡铅引线涂层。

特性

  • JEDEC JESD204B support
  • Ultra-low RMS jitter
    • 88fs RMS jitter (12kHz to 20MHz)
    • 91fs RMS jitter (100Hz to 20MHz)
    • -162.5dBc/Hz noise floor at 245.76MHz
  • Up to 14 differential device clocks from PLL2
    • Up to 7 SYSREF clocks
    • 3.1GHz Maximum clock output frequency
    • LVPECL, LVDS, HSDS, and LCPECL
    • Programmable outputs from PLL2
  • Up to 1 buffered VCXO/crystal output from PLL1, LVPECL, LVDS, 2xLVCMOS programmable
  • Dual loop PLLatinum™ PLL architecture
  • PLL1
    • Up to 3 redundant input clocks
      • Automatic and manual switch-over modes
      • Hitless switching and LOS
    • Integrated low-noise crystal oscillator circuit
    • Holdover mode when input clocks are lost
  • PLL2
    • Normalized (1Hz) PLL noise floor of -227dBc/Hz
    • Phase detector rate up to 155MHz
    • OSCin frequency-doubler
    • Two integrated low-noise VCOs
  • 50% duty cycle output divides, 1 to 32 (even and odd)
  • Precision digital delay, dynamically adjustable
  • 25ps step analog delay
  • Multi-mode: dual PLL, single PLL, and clock distribution
  • Industrial -40°C to +85°C temperature range
  • Supports +105°C PCB temperature (measured at thermal pad)
  • 3.15V to 3.45V operation
  • 64-pin QFN package (9.0mm × 9.0mm × 0.8mm)

应用

  • Wireless infrastructure
  • Data converter clocking
  • Networking, SONET/SDH, and DSLAM
  • Medical
  • Video
  • Military/aerospace
  • Test and measurement

视频

Simplified Schematic

框图 - Texas Instruments LMK0482x合成器和抖动清除器
发布日期: 2016-01-06 | 更新日期: 2025-10-31