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
- Up to 3 redundant input clocks
- 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
发布日期: 2016-01-06
| 更新日期: 2025-10-31
