Global Standards for the Microelectronics Industry
temperature coefficients of analog characteristics (α)
NOTE 1 The letter symbol for the temperature coefficient of an analog characteristic consists of the letter symbol α with a subscript referring to the relevant characteristic, e.g., aEG for the temperature coefficient of the gain error.
NOTE 2 Temperature coefficients of analog characteristics are usually specified in "parts per million (relative to the full-scale value) per degree Celsius", that is, in "ppm/oC".
References:
JESD99B, 5/07