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ADCLK954:  采用SiGe工艺,具有2个可选输入、12个LVPECL输出的时钟扇出缓冲器

产品详情

产品状态:推荐用于新设计

ADCLK954是一款采用ADI公司专有的XFCB3硅锗(SiGe)双极性工艺制造的超快型时钟扇出缓冲器。这款器件设计用于要求低抖动性能的高速应用。

该器件具有两个可通过IN_SEL控制引脚进行选择的差分输入。两个输入都具有带中心抽头、差分的100 Ω片上端接电阻。支持直流耦合的LVPECL、CML和3.3 V CMOS(单端)和交流耦合的1.8 V CMOS、LVDS和LVPECL输入。VREFx引脚可用来为交流耦合输入提供偏置。

ADCLK954具有12个全摆幅的发射极耦合逻辑(ECL)输出驱动器。对于LVPECL(正ECL)输出,将Vcc偏置到地。对于ECL输出,将VCC偏置到地,将VEE偏置到负电源。

输出级设计成可以将每端800 mV直接驱动至端接于VCC − 2 V 的50 Ω电阻,从而获得1.6 V的总差分输出摆幅。

ADCLK954采用40引脚LFCSP封装,额定工作温度范围为−40℃至+85℃的标准工业温度范围。

特点和优势

  • 2个可选的差分输入
  • 工作频率:4.8 GHz
  • 宽带随机抖动:75 fs
  • 片上输入端接
  • 3.3 V电源

ADCLK954 功能框图

文档

快讯名称 内容类型 文件类型
ADCLK954: Two Selectable Inputs, 12 LVPECL Outputs, SiGe Clock Fanout Buffer Data Sheet (Rev A, 07/2009) (pdf, 354 kB) 产品数据手册 PDF
MT-008: 将振荡器相位噪声转换为时间抖动  (pdf, 123 kB) 技术指南 PDF
UG-066: Setting Up the Evaluation Board for the ADCLK954  (pdf, 230 kB) 用户指导 PDF
Speedy A/Ds Demand Stable Clocks
by Jeff Keip, Analog Devices, Inc. (EE Times, 3/18/04)
技术文章 HTML
Design A Clock-Distribution Strategy With Confidence
by Demetrios Efstathiou (Electronic Design, April 27, 2006)
技术文章 HTML
Understand the Effects of Clock Jitter and Phase Noise on Sampled Systems
... Much of your system's performance depends on jitter specifications, so careful assessment is critical.
by Brad Brannon, Analog Devices (EDN, 12/7/2004)
技术文章 HTML
Clock Requirements For Data Converters
(Electronic Design, 2/2005)
技术文章 HTML
高速转换器时钟分配器件的端接[中文版]
(其它技术文章,2010年1月)
《模拟对话》杂志 HTML
模数转换器时钟优化:测试工程观点 [中文版]
(模拟对话, 第42卷,2008年2月)
《模拟对话》杂志 HTML
RF 手册  (pdf, 988 kB)
RF IC 选型指南(12/2010)
概况 PDF
数模转换器IC 解决方案,第10卷 • 第1期  (pdf, 2912 kB) 解决方案通报 PDF
Why do I see reference spurs? 常见问题解答 HTML
Why is my phase noise shape changing when I change the PLL settings? 常见问题解答 HTML
Why doesn't the PLL make my reference input and the clock outputs line up? 常见问题解答 HTML
How do I optimize my PLL loop for the best phase noise and/or jitter? 常见问题解答 HTML
My loop is not locking. How do I debug this? 常见问题解答 HTML
How long does it take for the PLL to lock? 常见问题解答 HTML
Help! My PLL came unlocked over temperature. 常见问题解答 HTML
How do I choose between active and passive filter in PLL loop? 常见问题解答 HTML
Should I reference the passive filter to ground? or supply? 常见问题解答 HTML
How do the PLLs in the AD951x parts compare to other ADI PLLs? 常见问题解答 HTML
How does the clock clean-up function of the AD951x parts work? 常见问题解答 HTML
Why do I want to run a fast PFD frequency? 常见问题解答 HTML
Is it ok for me to connect the same power supply to both the charge pump and distribution power supply pins? 常见问题解答 HTML
Why can't I use a bandpass filter for my loop filter? 常见问题解答 HTML
Should I tie my loop filter to ground or PLL supply? 常见问题解答 HTML
The loop filter was working great until I changed the divide ratio in PLL. What happened? 常见问题解答 HTML
How do I use a VCO with a supply greater than 5V? 常见问题解答 HTML
What suppliers do you recommend for VCO/VCXOs? 常见问题解答 HTML
Do VCXOs have better phase noise and jitter performance than VCOs? 常见问题解答 HTML
How do I know which VCO will work best with the AD9510? 常见问题解答 HTML
Is there an advantage to running a higher VCO frequency than the output frequency? 常见问题解答 HTML
How do I determine if a VCO is good enough for my purpose? 常见问题解答 HTML
Is there any difference between the nature of an oscillator's phase noise and the phase noise from a clock chip? 常见问题解答 HTML
Do different divide ratios cause variations in jitter? 常见问题解答 HTML
I have a clocking scheme which requires several different division ratios simultaneously. I have a frequency plan, but I'm concerned about crosstalk. How much of a problem is this with your clock distribution chips? 常见问题解答 HTML
Do divide ratios change the propagation delay? 常见问题解答 HTML
I want to use the phase offset feature on the AD9510 dividers to generate two signals 90° out of phase. How accurate is the phase offset? 常见问题解答 HTML
On the AD951x clock ICs, does the phase offset (coarse delay) affect the jitter? 常见问题解答 HTML
Why doesn't the mini-divider support the divide ratio I want? 常见问题解答 HTML
I want to use the variable delay adjust, but the jitter is too high. What can I do? 常见问题解答 HTML
I changed the coarse phase adjust in the evaluation software, but nothing happened. What's going on? 常见问题解答 HTML
What is the difference between the coarse phase adjust and the fine delay adjust? 常见问题解答 HTML
What is the fine delay adjust which is available on certain LVDS/CMOS outputs? 常见问题解答 HTML
Does the fine delay adjust affect the jitter? 常见问题解答 HTML
Why is the fine delay adjust not available on all the outputs? 常见问题解答 HTML
Is there a way to cause Input/Output rising edges to be synchronous (zero delay) with the AD9510/11? 常见问题解答 HTML
Will the AD9510 work without a reference input signal? 常见问题解答 HTML
What are the best clock sources for a distribution-only design? 常见问题解答 HTML
I am not using the CLK1 input on the AD9510. Can I just leave it floating? 常见问题解答 HTML
How good does my input signal need to be? 常见问题解答 HTML
I turned off my reference but the Digital Lock Detect (DLD) still says I'm locked. 常见问题解答 HTML
Can I shift the threshold on clocks for single-ended inputs? 常见问题解答 HTML
The reference input is differential, but my reference is single-ended. Do I need to convert to differential to drive the AD9510? 常见问题解答 HTML
Will differential or single-ended inputs/outputs improve my jitter? 常见问题解答 HTML
Why should I use differential rather than single-ended? 常见问题解答 HTML
How do I feed a single-ended signal into a differential input? 常见问题解答 HTML
Why do you recommend AC coupling, rather than DC coupling, at the clock inputs? 常见问题解答 HTML
Are the ADI clock parts stand-alone clock sources or do I still have to buy a clock source to drive these parts? 常见问题解答 HTML
Which provides better performance - a clock source with sinewave output, or one with differential square wave outputs? 常见问题解答 HTML
On the AD9510, what is the relationship between clock output jitter and CLK1/CLK2 input slew rate? 常见问题解答 HTML
I'm trying to write to the part in single-byte mode, but I can't write anything. What am I doing wrong? 常见问题解答 HTML
Can I use the 951X clocks to drive a mixer (RF LO)? 常见问题解答 HTML
My applications are RF, not for clocking data converters. Can ADI's 951X ICs be used for RF applications? 常见问题解答 HTML
I have an input present at the clock input, but I'm not seeing an output? 常见问题解答 HTML
What happens to the AD9510/11 clock outputs if the Reference Input (REFIN) signal goes away? 常见问题解答 HTML
What clock frequency comes out of the AD9510 outputs when you first apply power to the device? 常见问题解答 HTML
Is it possible to impedance match a clock output if it is heavily loaded? (e.g. CL=100pF) 常见问题解答 HTML
I ran the AD9510 outputs at 1.4 GHz and they seem to work fine. Is there a problem running them at 1.4 GHz? 常见问题解答 HTML
What should I do with unused channels on the AD9510? 常见问题解答 HTML
Can I tri-state the AD9510 outputs? 常见问题解答 HTML
On the AD9510, how can I make sure that the duty cycle of output clocks stays within 40% to 60% duty cycle window? 常见问题解答 HTML
What is the effect of distributing harmonically related clocks (on chip or on board) in terms of jitter? 常见问题解答 HTML
Is there any reason to use a transformer on a differential clock output to obtain a "clean" single-ended clock output? 常见问题解答 HTML
What are some of the advantages/disadvantages of using LVPECL vs. LVDS outputs? 常见问题解答 HTML
Does the AD9510 support 2.5V PECL? 常见问题解答 HTML
How much bandwidth is required to process a PECL or LVDS output? 常见问题解答 HTML
If I use only one of the PECL differential outputs and the unused output is terminated in 50Ω, how will this affect the phase noise or jitter of the single-ended output? 常见问题解答 HTML
If I change the level of PECL output, does it affect the jitter? 常见问题解答 HTML
What is the best way to terminate LVPECL outputs to get lowest jitter? 常见问题解答 HTML
Is it okay to AC-couple PECL or LVDS outputs? 常见问题解答 HTML
What is the fan-out capability of the CMOS, LVDS, and LVPECL outputs? 常见问题解答 HTML
What is the proper termination (value and location) for outputs? 常见问题解答 HTML
Are outputs short-circuit protected? 常见问题解答 HTML
Are the CMOS drivers on the clock devices complementary? 常见问题解答 HTML
Some of the schematics in the AD951x data sheets show an LVPECL termination scheme which is different from the classic termination often seen (50 Ω to Vs - 2V, or the Thevenin equivalent thereof). How does this work, and how did you chose 200 Ω for the resistors? Can I use 100 ohms to improve the slew rate (or jitter)? 常见问题解答 HTML
I have pulled SYNCB low, but I still have output from a channel. Why? 常见问题解答 HTML
Why can I not get the same output amplitude or rise and fall times as stated in your datasheet? 常见问题解答 HTML
The AD9510 datasheet says to use an external pull-up resistor on the FUNCTION pin. Why do I need this and what range of resistors will work? 常见问题解答 HTML
May I use the AD9540 for spread spectrum clocking? 常见问题解答 HTML
Can I get two clock outputs from the AD9540? 常见问题解答 HTML
What's the advantage of a DDS-based clock generator? 常见问题解答 HTML
Why does the AD9540 require special filtering on its analog output. What are the requirements of this filter? 常见问题解答 HTML
I'm working with optical networks - SONET/SDH. Do ADI's clock chips support these applications? 常见问题解答 HTML
On my board, I can't get the same low jitter numbers that are shown in the datasheet. Am I doing something wrong? 常见问题解答 HTML
How do you determine the bandwidth over which phase noise is integrated to obtain jitter? 常见问题解答 HTML
Using the "ADC SNR method", what is the equivalent bandwidth for the jitter specification? 常见问题解答 HTML
How do harmonic spurs in the output spectrum affect jitter (random or deterministic)? 常见问题解答 HTML
When a jitter number is specified without an associated bandwidth, what bandwidth should be assumed? 常见问题解答 HTML
How do you specify jitter? 常见问题解答 HTML
How do I use the clock part for jitter clean-up? 常见问题解答 HTML
If jitter can be calculated from phase noise measurements, is it possible to calculate phase noise from jitter numbers? 常见问题解答 HTML
Does jitter vary with different clock frequencies? How about phase noise? 常见问题解答 HTML
I sure can't measure jitter with femtosecond resolution on my scope! How do you do it? How much confidence do you have in the jitter figures that you are quoting for these parts? 常见问题解答 HTML
Do you guarantee performance shown in ADIsimCLK? 常见问题解答 HTML
Who do I contact for technical support on ADIsimCLK? 常见问题解答 HTML
Should I use the minimum charge pump current settings in order to minimize power? 常见问题解答 HTML
Can I run CMOS outputs at 5V? 常见问题解答 HTML
Can I use different power supply voltages for the PECL output drivers? 常见问题解答 HTML
Is .01 uF sufficient for power supply pin bypass? 常见问题解答 HTML
My application has pretty tight power consumption requirements. I am very interested in the capabilities of the AD9510, but I don't need every feature. Is it possible to turn off the unused features and save power? 常见问题解答 HTML
Why don't you spec psrr and cmrr in the datasheet? 常见问题解答 HTML
How do I get two AD951x (with PLL) to synchronize to the same reference input edge? 常见问题解答 HTML
I really need >10 clock outputs. Can I use multiple chips together and still guarantee that all output clocks are synchronized to REFIN? 常见问题解答 HTML
How do I synchronize multiple clock devices? 常见问题解答 HTML
What happens if I run the part in an ambient environment which exceeds 85°C? 常见问题解答 HTML
How can I determine the die temperature of your device? 常见问题解答 HTML
My circuit board has both an analog GND and a digital GND. How should I connect the AD9510 pins labeled GND? 常见问题解答 HTML
What PCB layout recommendations do you have for the of the exposed paddle on the bottom side of the LFCSP package? 常见问题解答 HTML
RAQs index 非常见问题解答 HTML
术语表 专业词汇表 HTML

设计工具,模型,驱动及软件

快讯名称 内容类型 文件类型
ADIsimCLK™设计与评估软件
ADIsimCLK is the design tool developed specifically for Analog Devices' range of ultra-low jitter clock distribution and clock generation products. Whether your application is in wireless infrastructure, instrumentation, networking, broadband, ATE or other areas demanding predictable clock performance, ADIsimCLK will enable you to rapidly develop, evaluate and optimize your design.
ADIsim Design/Simulation Tools HTML
ADCLK954 IBIS Model  (ibs) IBIS 模型 IBS

评估套件,原理图符号和PCB封装

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Sample样片申请及购买

价格,封装及供货状态

ADCLK954 型号选项
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这里所列出的美国报价单仅供预算参考,指美元报价(规定订量的每片美元,美国离岸价),如有修改不再另行通知。由于地区关税、商业税、汇率及手续费原因,国际报价可能不同。对于特殊批量报价,请与您当地的ADI公司办事处或代理商联络。对于评估板和套件的报价是指一个单位价格。

ADCLK954评估板
产品型号 描述 报价 RoHS 查看PCN/PDN 查看库存/
购买/样片
ADCLK954/PCBZ 产品状态: 量产 Evaluation Board $ 190.00 -

所示报价为单片价格。所列的美国报价单仅供预算参考,指美元报价(每片美国离岸价),如有修改,恕不另行通知。由于地区关税、商业税、汇率及手续费原因,国际报价可能不同。

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