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Externally powered AD5421

Question asked by Youri.K on Dec 9, 2012
Latest reply on Dec 10, 2012 by tjohnson

Hi,

In my scheme there is an internal power supply 3.3 V. I connected it hrough the decoupling diodes to the tied together terminals IODVDD and DVDD.
While debugging, I found that in the absence of loop powering digital part works, but the analog part is not functional.  I also found, that there is no voltage on REFOUT1,2.

Is there a possibility to combined powering of AD5421 ? First of all, I'm interested in the measurement of die temperature and loop voltage , even in the absence of external loop powering.

Regards,

Youri


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