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Looking for Clock device fout=304MHz, 200fs rms jitter

Ryuji
Guru 20090 points
Other Parts Discussed in Thread: CDCE62002, LMK03806, LMK04906

Hello all,
 
Our customer is looking for clock device which has below specification.
 
-Output Frequency : 304MHz
-Input Clock Frequency: any
-Output type: any
-Jitter : under 200fs
-Other: we don't need write register for 304MHz output.
              We must output 304MHz by Power on the device.
 
I can find CDCE62002 which has EEPROM device,  but our customer refused to write configuration to EEPROM...
Are there any device which can support above conditions ?
They would accept more jitter performance if the device can output 304MHz by pin or default configuration..
 
Best Regards,
Ryuji Asaka
 
  • 0
    TI__Mastermind 24205 points

    Hi Asaka-San,

    LMK03806 can generate 304 MHz from an off-the-shelf 16 MHz crystal oscillator with ~200fs RMS jitter (12 kHz - 20 MHz). LMK04906 (in single PLL configuration) is another option if you preffered to have fewer outputs. However, these devices do require Microwire programming to achieve the desired output frequency

    CDCE62002 can generate the required frequency with a 38 MHz oscillator with ~300fs RMS Jitter (12 kHz - 20 MHz) but it requires a write to the EEPROM

    For high volume applications, we can also support ROM spins our devices to address the required frequencies on power-up. I will notify the marketing enginner to follow up with you on the opportunity size / design timeframe.

    Couple of follow up questions:

    1) How many copies of the output frequency would you like? Are there other frequency requirements in your system?

    2) Where is the 304 MHz clock used in your system?

    3) What is the phase noise integration bandwidth for the jitter?

    Regards

    Arvind Sridhar

  • 0 in reply to Arvind Sridhar
    Guru 20090 points
    Hello Arvind san,
     
    Thank you for your reply and sorry for my late reply.
    This requre is for our customer jig... so this is not high volume...
     
    1) Our customer generate one of the 304MHz to their system.
    2) Maybe , 304MHz will go to FPGA or ASIC.
    3) I don't have the information.
     
    Best Regards,
    Ryuji Asaka
  • 0 in reply to Ryuji
    TI__Mastermind 24205 points

    Hi Asaka-San,

    Thanks for the reply. I do not have further information to add to my previous email.

    Regards

    Arvind Sridhar