in two of our boards we use AD7924WYRUZ AD Converter.
This ADWs are spezified in AD7924WYRUZ automotive quality.
Our supplier ordered and received a reel marked with AD7924WYRUZ.
A lot of this chips are placed on our boards – now we found inside of the reel
AD7924BRUZ marked ADWs.
Please see picture below.
My primary question: are the signal to noise ratio values the only values with
differ between B and WY quality
( temperature range of course )
Because the grades use different temperature conditions, this will have an
effect on the FIT. Although they are the same material (note: the automotive
grade may have tighter screens e.g. PAT, SBYL, etc.), a different use temp
condition would affect the FIT. Below is a link to the reliability program at
ADI that describes the FIT calculation (ADI Rel handbook) :