External Crystal on AD4115 and EVAL-AD4115SDZ

I just purchased an EVAL-AD4115SDZ so I could evaluate the AD4115. I've noticed that it works as expected after a reset using the internal clock - writing 0x0000 to the ADCMODE register and dropping CS indicates continuous conversions at 125Khz on the RD/MISO pin. But as soon as I write 0x00C0 to the ADCMODE register (enable external clock), the continuous data stream stops. When I look at the CLK test point with my oscilloscope, I am not seeing any oscillation. So my question is: did I receive a defective eval board or is there an undocumented issue with the AD4115. For the record, I also have the AD4112 eval board and the external XTAL oscillator works correctly. 



Fixed typo
[edited by: WallyBalls at 1:58 PM (GMT -5) on 15 Jan 2021]
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    •  Analog Employees 
    on Feb 16, 2021 1:40 AM in reply to WallyBalls

    Hi Folks, 

    Good to hear that you are both progressing well. Though can you help me Wally to close the two open items regarding your concern. You can just somehow reply how you solved the issue if that won't bother you, so it will help other members in the community that may encounter similar issues. 

    Thanks,

    Jellenie

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