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ADF4360-6: Integrated Synthesizer and VCO Data Sheet (Rev B, 11/2012) (pdf, 472 kB)
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Data Sheets |
PDF
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AN-873: Lock Detect on the ADF4xxx Family of PLL Synthesizers
(pdf, 207 kB)
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Application Notes |
PDF
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AN-30: Ask the Applications Engineer - PLL Synthesizers
(pdf, 184 kB)
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Application Notes |
PDF
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Fundamentals of Frequency Synthesis, Part 2: Direct Digital Synthesis (DDS)
This month we conclude our two-part series on frequency synthesis, with an introduction to Direct Digital Synthesis. We will give a basic review of how a direct digital synthesis system works, touching on the inner workings of the DDS engine at a relatively high level. We will also discuss the tradeoffs between PLL and DDS technology as a base choice for frequency synthesis needs.
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Webcasts |
WEBCAST
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UG-476: PLL Software Installation Guide
(pdf, 520 kB)
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User Guides |
PDF
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UG-103: Evaluation Board for ADF4360-6
(pdf, 252 kB)
Integrated PLL and VCO Frequency Synthesizer
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User Guides |
PDF
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Phase-Locked Loops for High-Frequency Receivers and Transmitters - Part 2
(pdf, 107 kB)
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Technical Articles |
PDF
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Phase Locked Loops for High-Frequency Receivers and Transmitters – Part 1
(pdf, 68 kB)
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Technical Articles |
PDF
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Phase Locked Loops for High-Frequency Receivers and Transmitters – Part 3
(pdf, 76 kB)
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Technical Articles |
PDF
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PLLs/Synthesizers Product Highlight
(pdf, 269 kB)
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Overview |
PDF
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PLL Synthesizers/VCOs - Overview
(pdf, 510 kB)
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Overview |
PDF
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RF Source Booklet
(pdf, 815 kB)
RF IC Product Overview - Version O (11/2012)
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Overview |
PDF
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Products for Wireless Handset Applications
(pdf, 1441 kB)
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Overview |
PDF
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Product Solutions for Handset Applications
(pdf, 349 kB)
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Overview |
PDF
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Clock and Timing ICs
(pdf, 4970 kB)
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Overview |
PDF
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RAQs index
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Rarely Asked Questions |
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Why do I see reference spurs?
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FAQs/RAQs |
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Why is my phase noise shape changing when I change the PLL settings?
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FAQs/RAQs |
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Why doesn't the PLL make my reference input and the clock outputs line up?
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FAQs/RAQs |
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How do I optimize my PLL loop for the best phase noise and/or jitter?
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FAQs/RAQs |
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My loop is not locking. How do I debug this?
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FAQs/RAQs |
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How long does it take for the PLL to lock?
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FAQs/RAQs |
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Help! My PLL came unlocked over temperature.
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FAQs/RAQs |
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How do I choose between active and passive filter in PLL loop?
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FAQs/RAQs |
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Should I reference the passive filter to ground? or supply?
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FAQs/RAQs |
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How do the PLLs in the AD951x parts compare to other ADI PLLs?
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How does the clock clean-up function of the AD951x parts work?
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Why do I want to run a fast PFD frequency?
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FAQs/RAQs |
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Is it ok for me to connect the same power supply to both the charge pump and distribution power supply pins?
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FAQs/RAQs |
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Why can't I use a bandpass filter for my loop filter?
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FAQs/RAQs |
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Should I tie my loop filter to ground or PLL supply?
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FAQs/RAQs |
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The loop filter was working great until I changed the divide ratio in PLL. What happened?
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How do I use a VCO with a supply greater than 5V?
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FAQs/RAQs |
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What suppliers do you recommend for VCO/VCXOs?
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Do VCXOs have better phase noise and jitter performance than VCOs?
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How do I know which VCO will work best with the AD9510?
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Is there an advantage to running a higher VCO frequency than the output frequency?
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How do I determine if a VCO is good enough for my purpose?
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Is there any difference between the nature of an oscillator's phase noise and the phase noise from a clock chip?
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Do different divide ratios cause variations in jitter?
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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?
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Do divide ratios change the propagation delay?
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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?
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On the AD951x clock ICs, does the phase offset (coarse delay) affect the jitter?
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Why doesn't the mini-divider support the divide ratio I want?
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I want to use the variable delay adjust, but the jitter is too high. What can I do?
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I changed the coarse phase adjust in the evaluation software, but nothing happened. What's going on?
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FAQs/RAQs |
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What is the difference between the coarse phase adjust and the fine delay adjust?
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What is the fine delay adjust which is available on certain LVDS/CMOS outputs?
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Does the fine delay adjust affect the jitter?
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Why is the fine delay adjust not available on all the outputs?
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Is there a way to cause Input/Output rising edges to be synchronous (zero delay) with the AD9510/11?
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Will the AD9510 work without a reference input signal?
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What are the best clock sources for a distribution-only design?
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I am not using the CLK1 input on the AD9510. Can I just leave it floating?
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How good does my input signal need to be?
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I turned off my reference but the Digital Lock Detect (DLD) still says I'm locked.
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Can I shift the threshold on clocks for single-ended inputs?
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The reference input is differential, but my reference is single-ended. Do I need to convert to differential to drive the AD9510?
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Will differential or single-ended inputs/outputs improve my jitter?
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Why should I use differential rather than single-ended?
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How do I feed a single-ended signal into a differential input?
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Why do you recommend AC coupling, rather than DC coupling, at the clock inputs?
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Are the ADI clock parts stand-alone clock sources or do I still have to buy a clock source to drive these parts?
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Which provides better performance - a clock source with sinewave output, or one with differential square wave outputs?
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On the AD9510, what is the relationship between clock output jitter and CLK1/CLK2 input slew rate?
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I'm trying to write to the part in single-byte mode, but I can't write anything. What am I doing wrong?
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Can I use the 951X clocks to drive a mixer (RF LO)?
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My applications are RF, not for clocking data converters. Can ADI's 951X ICs be used for RF applications?
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I have an input present at the clock input, but I'm not seeing an output?
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What happens to the AD9510/11 clock outputs if the Reference Input (REFIN) signal goes away?
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What clock frequency comes out of the AD9510 outputs when you first apply power to the device?
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Is it possible to impedance match a clock output if it is heavily loaded? (e.g. CL=100pF)
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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?
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What should I do with unused channels on the AD9510?
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Can I tri-state the AD9510 outputs?
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On the AD9510, how can I make sure that the duty cycle of output clocks stays within 40% to 60% duty cycle window?
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What is the effect of distributing harmonically related clocks (on chip or on board) in terms of jitter?
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Is there any reason to use a transformer on a differential clock output to obtain a "clean" single-ended clock output?
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What are some of the advantages/disadvantages of using LVPECL vs. LVDS outputs?
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Does the AD9510 support 2.5V PECL?
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How much bandwidth is required to process a PECL or LVDS output?
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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?
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If I change the level of PECL output, does it affect the jitter?
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What is the best way to terminate LVPECL outputs to get lowest jitter?
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Is it okay to AC-couple PECL or LVDS outputs?
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What is the fan-out capability of the CMOS, LVDS, and LVPECL outputs?
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What is the proper termination (value and location) for outputs?
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Are outputs short-circuit protected?
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Are the CMOS drivers on the clock devices complementary?
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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)?
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I have pulled SYNCB low, but I still have output from a channel. Why?
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Why can I not get the same output amplitude or rise and fall times as stated in your datasheet?
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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?
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May I use the AD9540 for spread spectrum clocking?
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Can I get two clock outputs from the AD9540?
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What's the advantage of a DDS-based clock generator?
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Why does the AD9540 require special filtering on its analog output. What are the requirements of this filter?
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I'm working with optical networks - SONET/SDH. Do ADI's clock chips support these applications?
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On my board, I can't get the same low jitter numbers that are shown in the datasheet. Am I doing something wrong?
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How do you determine the bandwidth over which phase noise is integrated to obtain jitter?
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Using the "ADC SNR method", what is the equivalent bandwidth for the jitter specification?
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How do harmonic spurs in the output spectrum affect jitter (random or deterministic)?
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When a jitter number is specified without an associated bandwidth, what bandwidth should be assumed?
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How do you specify jitter?
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How do I use the clock part for jitter clean-up?
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If jitter can be calculated from phase noise measurements, is it possible to calculate phase noise from jitter numbers?
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Does jitter vary with different clock frequencies? How about phase noise?
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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?
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Do you guarantee performance shown in ADIsimCLK?
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Who do I contact for technical support on ADIsimCLK?
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Should I use the minimum charge pump current settings in order to minimize power?
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Can I run CMOS outputs at 5V?
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Can I use different power supply voltages for the PECL output drivers?
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Is .01 uF sufficient for power supply pin bypass?
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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?
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Why don't you spec psrr and cmrr in the datasheet?
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How do I get two AD951x (with PLL) to synchronize to the same reference input edge?
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I really need >10 clock outputs. Can I use multiple chips together and still guarantee that all output clocks are synchronized to REFIN?
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How do I synchronize multiple clock devices?
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What happens if I run the part in an ambient environment which exceeds 85°C?
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How can I determine the die temperature of your device?
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My circuit board has both an analog GND and a digital GND. How should I connect the AD9510 pins labeled GND?
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What PCB layout recommendations do you have for the of the exposed paddle on the bottom side of the LFCSP package?
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What is a PLL Synthesizers and how is it used?
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Glossary of EE Terms
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Glossary |
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