字数:8570,页数:27
摘要
简要介绍AD9511时钟分配的内部结构，基本功能，及典型应用。芯片特征有：低相位噪音PLL内核，参考输入频率至250 MHz，可编程的双重- 模数预定标器，可设计的电荷泵 (CP) 电流，分离 CP 补给 (VCPS) 扩展调整范围范围，二个 1.6 GHz,微分时钟输入，5个可编程除法器,1 到 32,所有整数，对输出-到- 输出粗略延迟调整的相位选择，3个独立的 1.2 GHz LVPECL 输出，附加输出抖动 225 fs rms，2个独立的 800 MHz/250 MHz LVDS/CMOS 时钟输出，附加输出抖动 275 fs rms，5个在1个LVDS/CMOS 输出的延时调整，连续控制端口，空间- 援救的 48 个领引的 LFCSP，充分利用空间的48引脚 LFCSP。
关键字： 可编程 PLL 电荷泵 延时调整
Abstract It briefly introduced the AD9511 internal structure, function, and typical apply circuit. Low phase noise phase-locked loop core, Reference input frequencies to 250 MHz, Programmable dual-modulus prescaler, programmable charge pump (CP) current, Separate CP supply (VCPS) extends tuning range, two 1.6 GHz, differential clock inputs,5 programmable dividers, 1 to 32, all integers, Phase select for output-to-output coarse delay adjust,3 independent 1.2 GHz LVPECL outputs, Additive output jitter 225 fs rms ,2 independent 800 MHz/250 MHz LVDS/CMOS clock outputs,Additive output jitter 275 fs rms, Fine delay adjust on 1 LVDS/CMOS output, Serial control port, Space-saving 48-lead LFCSP。
Key words: Programmable PLL Charge Pump Delay adjust
目录
1．AD9511芯片简介 ...............................................................4 2. 主要功能单元描述 ...............................................................4 2.1 总体描述 .....................................................................4 2.2 PLL单元 ......................................................................5 2.3 功能引脚 .....................................................................10 2.4 分配单元 .....................................................................10 2.5 除法器 ......................................................................11 2.6延时单元电路 ..................................................................17 3. 使用 AD9511 输出作为A/D转换时钟应用............................................18 4. 外形尺寸.......................................................................21 5. AD9511评估版图 ................................................................22 6. 总结 ..........................................................................26 7．参考文献.......................................................................26
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