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Output voltage stability of AD9361's AuxDAC versus supply voltage change

Question asked by shurik22 on Oct 13, 2016
Latest reply on Oct 17, 2016 by Vinod

Hi,

I want to use AuxDAC of AD9361 for VCTCXO control. But I have doubts concerning output voltage stability of the AuxDAC versus supply voltage change. If the reference voltage of AuxDAC is simply power supply of AD9361 so it will be safer for my project to use external DAC powered by LDO. Otherwise I need more information about stability of AuxDAC's output voltage than I have found in manuals. Can anyone give me such information in forms like deltaVDACOut/deltaVsupply or power supply rejection ratio (PSRR) or others? Or give me please at least information whether has AuxDAC its own reference voltage source or its reference voltage is simply power supply voltage of AD9361? Thanks.

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