full scale, positive (of a bipolar analog-to-digital converter [digital-to-analog converter])

A term used to refer a characteristic to the positive end of the transfer diagram, that is, to the step whose nominal midstep [step] value has the most positive value.

NOTE 1 The subscript for the letter symbol of a characteristic at positive full scale is "FS+" (e.g., VFS+, IFS+).

NOTE 2 In place of a letter symbol, the abbreviation "FS+" is commonly used.

References: 

JESD99B, 5/07