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AD5645RBUZ : supply voltage range

Question asked by ysuzuki on Feb 27, 2017
Latest reply on Feb 28, 2017 by isantos



I have a question about supply voltage range for AD5645RBRUZ.
AD5645RBRUZ has a internal vref 2.5V.
The test condition for "REFERENCE OUTPUT(2.5V)", which is indicated in page-3 of the data sheet, is indicating "VDD=4.5V to 5.5V".
I could not find any notices about supply voltage range for 2.5V vref in other section. And from this data sheet, it can be read the "supply voltage range" is 2.7 V to 5.5 V without particular limitation totally.


Does AD5645RBRUZ need 4.5V to 5.5V supply voltage ?


In realy, our customer has a trouble in an attempt to use 3.3V supply voltage.
 - VREFOUT voltage : 2.41V
 - Voutx voltage for 0x8000 : 2.24V


While he input 2.5V to VREFIN(external vref), the Voutx output 2.4V.


Best regards,