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AD9653 : regeister settings for selecting VREF mode

Question asked by ysuzuki on Feb 19, 2018
Latest reply on Feb 20, 2018 by ysuzuki

Hello,

 

I have a question about registor settings for Vref function.
When I select "Fixed Internal Reference" mode, how shuold I set to register 0x18[2:0] ?
The "Fixed Internal Reference" mode is doule of the internal voltage, then the input range is 2.0Vpp.
From this point of view, register 0x18[2:0] can be 0x04.
But the "Fixed External Reference" mode can be selected by setting to 0x04 too.
Which value , 0x00 to 0x04, is correct to select "Fixed Internal Reference mode" ?

 

Best regards,
ysuzuki

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