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Queries on Vref & CLK for AD7626

Question asked by atrajesh on Feb 18, 2013
Latest reply on Feb 19, 2013 by jcolao


I am planning to use AD7626 in echoed-clock interface mode for my design. I have 2 queries:


1. What decides the choice for the reference voltage - (a) Internal 1.2V, (b) External 1.2V at REFIN, and (c) External 4.096V at REF.


2. Referring to page 6 of the AD7626 datasheet, how much before the CNV pulse will the CLK pulses need to be sent to the AD7626 for the conversions. There is no mention of this, even though it is shown that the CLK pulses are sent before the CNV pulse.