AD9082 TMU_REFP connected to AVDD2 instead of DVDD1P8 on the EVM

Hello.


The AD9082-FMCA-EBZ evaluation board connects TMU_REFP to AVDD2 even though the AD9082 datasheet states that this pin should be connected to DVDD1P8:

From the AD9082 datasheet:

Some questions:

  • Should TMU_REFP be connected to DVDD1P8 or AVDD2?
  • What is the current requirement for TMU_REFP?
  • Also, why does the AD9082-FMCA-EBZ evaluation board run DVDD1P8 at 2V instead of 1.8V?

Thanks for the help.



Changed title for accuracy.
[edited by: daedalus at 7:58 AM (GMT -4) on 28 Jul 2021]
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  • +1
    •  Analog Employees 
    on Jul 27, 2021 2:38 PM

    Hi, 

    The TMU can run on both a 1.8V or 2V supply. please see below

    on the AD9082-FMCA-EBZ, we had initial silicon which we werent sure would allow the TMU to work at 1.8V. Hence, we designed the board with 2V. however, future revisions of the silicon and further evaluations proved that the TMU can indeed work well at 1.8V. Hope this helps. 

Reply
  • +1
    •  Analog Employees 
    on Jul 27, 2021 2:38 PM

    Hi, 

    The TMU can run on both a 1.8V or 2V supply. please see below

    on the AD9082-FMCA-EBZ, we had initial silicon which we werent sure would allow the TMU to work at 1.8V. Hence, we designed the board with 2V. however, future revisions of the silicon and further evaluations proved that the TMU can indeed work well at 1.8V. Hope this helps. 

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