What are the differences between TL331QDBVRQ1 and TL331BQDBVRQ1?
Do we have a document with the major differences?
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The "B" is a new design on a 300mm process, as opposed to the 50 year old process of the non-B.
The front page has a table summarizing the differences.
The main difference is lower bias currents, slightly faster response, lower supply current and specified 36V max supply.
The non-B devices are under PCN's and eventually all the devices will be the "B" die - so best to start off the "B" device for new designs.
For most applications (that operate within datasheet specs), the "B" is a drop in improved replacement.