What are the meanings of IC's suffixes?
Every manufacturer has a different set of suffixes they add to their part numbers.

Most often they designate the package (SOIC, QFN, ...). Sometimes there's a code for whether the part is lead-free. And sometimes there's a code indicating how quantities of the part are packaged for shipping (usually tape &amp; reel, but some parts might be available on different sized reels).

For analog parts, it's also common to have suffixes (typically 'A', 'B', etc.) designating different precision parts (for example a 1% voltage reference vs a 2% reference), different voltage settings, etc.

You'll need to check your datasheet to see exactly what suffixes are used for your part and what they mean. For your part, this information is on page 6 of the datasheet: