125mhz 50 ohm clock driver low jitter

Critical timing components, such as clock oscillators and vcxos, are required to have rigorous control over jitter performance. Ultralow phase jitter smd clock oscillator common key electrical specifications lvcmos, lvpecl, lvds, hcsl key electrical specifications lvcmos v dd 2. Ttl outputs long line drivers high speed digital communications system testing basic lab tool 1 ppsirigb line driver hilo logic level generation features. A localized fanout buffer can maintain clock integrity across the multiple loads, but at a cost in component and power.

Idt5v925bi data, programmable lvcmoslvttl clock generator idt5v925bi data sheet general description the idt5v925bi is a highperformance, low skew, low jitter phaselocked loop pll clock. Many other applications, such as pcie, have separate pages under applicationspecific clocks. This, in conjunction with flexible feedback divider ratios of 10 to 100, enables support of multirate protocols including ethernet 1. It is assumed that the clock s board will be mounted directly on the pcb where the 10 converters are soldered. Combined with a low jitter of 151fs rms max over 12khz to 20mhz at 25mhz this miniature clock oscillator has been designed primarily for. Low jitter, 8khz reference clock synthesizer outputs 35. The max3639 is a highly flexible, precision phaselocked loop pll clock generator optimized for the next. Input termination figure 1 shows the recommended input clock termination.

In order to achieve extremely low jitter levels, all of these disciplines must be mastered and the implementation must be flawless. Max3698a five lvds outputs at 125mhz max3697a four lvds outputs at 125mhz, one lvds output at 125mhz 156. Using the sabre dac clocking scheme the jitter is that of the fixed frequency master dac oscillator you can buy and use an ultrahigh performance clock as designed to rf applications. Rms phase jitter 182 fs 12 khz 20 mhz bandwidth frequency mhz full bandwidth phase jitter ps phase jitter 12 khz to 20 mhz integrated bandwidth ps rms 155. Dsc8101 dsc8112 programmable lowjitter precision cmos oscillator 1 package dimensions. It far exceeds any pll that clock can be any frequency at all from about 20100mhz the audio quality suffers no degradation due to pll artifacts.

The typical and recommended distribution scheme is each 16 way 1pps driver output has 1 and only 1 50 ohm load. Low skew 1 to 4 clock buffer features iilow skew outputs 250 ps ipackaged in 8pin soic iilow power cmos technology iioperating voltages of 1. Measured with the pll open loop and no refclk or vco input. The device is a cost efficient replacement for the crystal oscillators commonly used in electronic systems.

What would be the best way to distribute the clocks signal to the 10 converters. All evbs support detailed current measurements for any configuration. As low as 380 fs rms lowphasenoise clock generator. Power, idt5v925bqgi revision c january 07, 20 20 integrated device technology, inc. It has an integrated integrated between 10 khz to 20 mhz lownoise, lcbased voltagecontrolled oscillator vco that operates within the 1. The si53314 is an ultra low jitter six output differential buffer with pinselectable output clock. Tentlabs xo2 and xo3 are low jitter clock upgrade for all of your cddvd player. Supply voltage max9476 toc04 supply voltage v output clock jitter ps. Lowpower lowjitter onchip clock generation a dissertation submitted in partial satisfaction of the requirements for the degree doctor of philosophy in electrical engineering by mozhgan mansuri 2003. It provides precise phase and frequency alignment of its clock outputs to an externally applied clock input or internal crystal oscillator. The device uses idts fourth generation femtoclock ng technology for an optimum of high clock frequency and low phase noise performance, combined with a low power consumption and high. But the roach2s receiving circuits mean the following low budget and slightly kludgey 1 output to 4 input schemes are worth considering 4 way split using 4 sets of ac coupling caps 4 way ac coupled splitter pdf. Cdcm61004 four output, integrated vco, lowjitter clock.

The transmitter clock is generated by a lowjitter lcbased voltagecontrolled oscillator vco that spans a 45% tuning range. The 843022i48 uses a 25mhz crystal to synthesize 125mhz or 75mhz. Designers of todays wireless systems demand the use of lowjitter circuit components and topology. The devices employ a fully differential pll design to minimize cycletocycle and phase jitter. Equations and example calculations are also provided. But the roach2s receiving circuits mean the following low budget and slightly kludgey 1 output to 4 input schemes are worth considering 4 way split using 4 sets of ac coupling caps 4. Clockworks pcie quad outputs ultralow jitter, hcsl. The nb3n511 is commonly used in electronic systems as a cost efficient replacement for crystal oscillators features. The new cxoxlpn series clock oscillator launched by iqd offers excellent low phase noise of typically 162dbchz at 1mhz frequency offset and 149dbchz at 1khz. Dedicated low noise power supply included to provide noise below 5 nvsqrt hz or 30 times more quiet than average lm317. In both modes, the clock is generated by a low jitter pll source that is capable of generating clocks from 320khz up to 1ghz. Ultra low phase noise, low jitter clock oscillator iqd. The table below shows measured phase jitter at three recognized bandwidths. Hiflex clock generators provide ultra low jitter of 0.

An output enable oe pin is provided, and when asserted low, the clock output goes into tri. In order to achieve extremely low jitter levels, all of these disciplines must be mastered and the implementation must be. The si53365 is ideal for low jitter lvcmos clock distribution. The zl40200 is designed to fan out lowjitter reference clocks for wired or optical. Evaluation kit available evaluation kit available lowjitter. The device uses a high q fundamental crystal and phase lock loop pll multiplier to provide selectable 125 mhz or 250 mhz, ultra low jitter and phase noise lvpecl differential output. The cdcu2a877 is a highperformance, low jitter, low skew,zerodelaybuffer that distributes a differential clock input pair ck, ck to 10 differential pairs of clock outputs yn, yn and to one differential pair of feedback clock outputs fbout, fbout. Among these buffers are some specifically designed to re clock the original clock signal and so reduce jitter sometimes called clock cleaners as a slang term. With output frequencies of up to 125 mhz, and output skews of 100 ps, the pck953 is ideal for the most demanding clock tree designs. Traditionally, plls have been one of the most commonly used signal cleaning methods, but as higher frequencies are being used, the limits imposed by both the design complexity and performance of plls is being felt. This new clock oscillator is now made available at a very reasonable price.

What would be the best way to distribute the clock s signal to the 10 converters. Clock synthesizer 843022i48 data sheet 843022i48 revision a 92515 1 2015 integrated device technology, inc. Low jitter clock clearly we need a low jitter clock to the dac. General description the 843n25245 is a 1 lvpecl an d 1 lvcmos output synthesizer optimized to generate ethernet reference clock frequencies. Lmk00105 ultralow jitter lvcmos fanout buffer and level. The output re sistance of these pins are selfcalibrating to 50. Lmk61xx highperformance ultralow jitter oscillator 1 1 features 1 ultralow noise, high performance jitter. The parallel interface can be configured for gmii, rgmii, tbi, rtbi, or 10100 mii, while the serial interface can be configured for. B april 28, 2009 general description the ics840021 is a gigabit ethernet clock generator and a member of the hiperclockstm family of high performance devices from idt.

Datasheets and support documentation are available on. Ultra low phase noise, low jitter clock oscillator. Dual frequency lvpecl clock oscillator module the nbxdba019 dual frequency crystal oscillator xo is designed to meet today\s requirements for 3. How do simultaneous data and clock signal jitter prevent readability. Max24287 1gbps paralleltoserial mii converter general description the max24287 is a flexible, low cost ethernet interface conversion ic. It combines an atcut crystal, an oscillator, and a low noise pll in a 5mm by 3. Ddr memory modules zero delay board fan out provides complete ddr dimm logic solution with or icssstv32852 product. The zl40207 is designed to fan out lowjitter reference clocks for wired or optical. Lowjitter, 8khz reference clock synthesizer outputs 35. Ten lvcmos output low additive jitter fanout buffer. The plot also shows how the frequency spreading is happening downwards. Design and layout guidelines for the cdcvf2505 clock. The nb3n3002 is a precision, low phase noise clock generator that supports. Clock distribution for lowjitter audio dac electrical.

Precision oscillators with the lowest phase noise, lowest jitter and the best stabilities in the smallest foots for use in diagnostic imaging equipment, wireless telemetry and patient monitoring. A versatile lowjitter pll in 90nm cmos for serdes transmitter clocking. Pck953 20 mhz to 125 mhz pecl input, 9 cmos output, 3. The 843022i48 has excellent phase jitter performance, over the 12khz 20mhz integration. The design of the circuits, the power subsystem and circuitboard layout has a huge impact on the performance of a reclocker. Reo is an 8khz reference clock output with jitter suppression. Generates four hcsl clock outputs at 25mhz, 100mhz, 125mhz, and 200mhz.

It combines an atcut crystal, an oscillator, and a lownoise pll in a 5mm by 3. Clockworks pcie quad outputs ultralow jitter, hcsl frequency. The max3670 is a low jitter 155mhz622mhz reference clock generator ic designed for system clock distribution. The idt5v925bi is a highperformance, low skew, low jitter phaselocked loop pll clock driver. This device is a member of on semiconductors pureedge clock. Standard clock oscillators 125 mhz 50 ppm 15pf enlarge mfr. This parameter was measured from 125 mhz to 750 mhz. Lowjitter, wide frequency range, programmable clock generator with 10 outputs max3639. Fullyintegrated, fixed frequency, lowjitter crystal. Standard clock oscillators 125mhz clock oscil cmos enlarge mfr. The ics840021 uses a 25mhz crystal to synthesize 125mhz. The vod parameter was measured from 125 mhz to 750 mhz. The device has a differential input equipped with two onchip 50 ohm termination resistors.

I am building a 10channel audio dac using 10 es9018 converters and an ultra low phase noise clock with femtosecond jitter. Designers of todays wireless systems demand the use of low jitter circuit components and topology. The clock outputs are controlled by the input clocks ck, ck, the feedback clocks. Ultra lowjitter 2mhz to 2700mhz clock synthesizer suits. Ultralow jitter clocks low jitter clock generators suitable for serial data applications up to 100g. For example at fout 125 mhz the output duty cycle limit is 50% 2. Precision oscillators supporting critical medical applications. Substituting the standard clock with these new clock oscillators, designed with low jitter in mind, will greatly enhance the sound quality of your digital disc players.

Low power low jitter onchip clock generation a dissertation submitted in partial satisfaction of the requirements for the degree doctor of philosophy in electrical engineering by mozhgan mansuri 2003. Please contact abracon for the availability of other configurations. In high speed mode, the dioii provides a 16bit parallel io capability up to 200mhz. Ten lvcmos output low additive jitter fanout buffer microchip. Power supply connection for the 156m lvds output buffer and output dividers.

Low skew 1 to 4 clock buffer clock jitter definitions. The jitter of the master clock in the reclocker can vary. Pi6x027 datasheet 27 mhz crystal oscillator for pi6cx10027. Typical termination for output driver and device evaluation. The jitter of the masterclock in the reclocker can vary. An established figure of merit is the 12khz to 20mhz phase jitter measurement using no additional filtering. In low speed mode it provides a 20bit parallel or 24bit serial io capability running at speeds up to 50mhz. In an example using a 125mhz xo driving a buffer ic, it is better to route the clock trace on the component. D vs a volume 25 of 39 the system level problem we cannot use a very good clock at the dac because we are not master of the data source. Lvcmos outputs measured into a 6 inch 50 pcb trace with 5 pf load. Nb3n3002 clock generator, 25 mhz, 100 mhz, 125 mhz, 200. Series termination series termination is effective in reducing the driver s edge rate, and it consumes low power. Ultra lowjitter 2mhz to 2700mhz clock synthesizer suits data converters. Home 2 output channels 4 channel high input impedance 50 ohm ttl line driver 4 channel high input impedance 50 ohm ttl line driver sku.

Detailed power consumption for any configuration can be estimated using clockbuilderpro when an evaluation board evb is not available. Lowjitter, 8khz reference clock synthesizer outputs. Jitter reduction on highspeed clock signals eecs at uc. It is assumed that the clocks board will be mounted directly on the pcb where the 10. If more than one unique output frequency is required eg. Lmk61xx highperformance ultralow jitter oscillator 1 1 features 1 ultralow noise, high performance. General description the 843022i48 is a fibre channel clock generator. The pi6c49x0204c is a low skew, single input to four output, clock buffer. Standard clock oscillators 125mhz clock oscil cmos. With a total of 115fsrms absolute jitter snr method, the ltc6951 delivers the low jitter clocks necessary to achieve the.