Difference between AD7924WYRUZ and AD7924BRUZ

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Accepted Answer

Question 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 ) Answer 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) :
 
 http://www.analog.com/static/imported-files/user_guides/UG-311.pdf

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AD7924: FAQ