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CDCE72010: CDCE72010 on ADS5562EVM - overheating? Currently running with 200MHz XO

NP
Prodigy 150 points
Part Number: CDCE72010
Other Parts Discussed in Thread: ADS5562EVM,

Hi,

I currently have a 200MHz XO mounted on the ADS5562EVM. I made modifications to the EVM board to accommodate the XO (original design calls for a VCXO). What I'm expecting is to see a 50MHz signal coming out from the U1N output since TI factory programmed it with divide by 4. However, I'm not seeing any signals at the moment but I've also noticed that the CDCE72010 is incredibly hot (+50 degrees cel. ambient). I've also set all the appropriate jumpers to enable the CDCE chip on the ADS5562EVM.

Ron.

  • 0
    Prodigy 150 points
    Any ideas if this chip is supposed to run this hot? Thank you.
  • 0 in reply to NP
    TI__Expert 4415 points
    Hi Ron,

    You should be able to use the CDCE72010 as just a frequency divider. I would check the make sure the input termination is set correctly to match the output format of the oscillator that you are using.

    It is normal for the device to run quite hot under certain configurations- changing the device configuration so that it matches your use case may reduce the power consumption.

    Regards,
    -Tim