LM358BA: LM358BAIDR - About “I” of suffix

Hi Hide,

B = New version - This will not be present in the older LM358 version.

A = Improved Offset

I = Industrial - This letter would be a "Q" if it were an automotive device

D = SOIC package

R = Reel

Here is another forum post explaining the part number of an INA device. 

I also recommend taking a look at "Design Guidelines for LM324/358 Devices". There is a lot of helpful information in that app note, including information about part numbers.

Thank you,

Tim Claycomb