OA1MPA datasheet(18/28 Pages) STMICROELECTRONICS

18 / 28 page

Application information

OA1MPA, OA2MPA, OA4MPA

18/28

DocID025992 Rev 1

Equation 5

To evaluate the op amp reliability, a follower stress condition is used where VCC is defined

as a function of the maximum operating voltage and the absolute maximum rating (as

recommended by JEDEC rules).

The Vio drift (in µV) of the product after 1000 h of stress is tracked with parameters at

different measurement conditions (see Equation 6).

Equation 6

The long term drift parameter (Vio), estimating the reliability performance of the product, is

obtained using the ratio of the Vio (input offset voltage value) drift over the square root of the

calculated number of months (Equation 7).

Equation 7

where Vio drift is the measured drift value in the specified test conditions after 1000 h stress

duration.

Months

1000 h



12 months

24 h

365.25 days









maxV

op with Vicm

CC 2



V

iodrift

months



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OA1MPA Datasheet(PDF) 18 Page - STMicroelectronics