Hello experts,
Hi Ryo,
OP07C is designed for 0-70C operating conditions. As you pointed out, the performance within the temperature range will not be guaranteed.
Is it possible to operate in -40 degree to 125 degree if we ignore accuracy which datasheet guarantee?
your questions are very vague. Will it operate from -40C to 125C, if we ignore accuracy? my answer is maybe, but which parts of inaccuracy that your application is able to live with. I would not recommend in the case, because the actual operating temperature vs. recommended operating temperature is far apart. Are you able to find other replacement from our precision op amp selections?
When the part is characterized, the figures in the datasheet are based on 0-70C operating temperature. There must be a reason that we specify the temperature range from 0-70C instead of other operating temperature range (also this part seems to be dated back in 1983).
If one increases the operating temperature range (e.g. -10C to 85C), you will get another set of performance figures. I do not know which parts of accuracy are important to you.
When I worked as aerospace system engineer, I often tested a system/device when temperature ratings are in questions. Let us say that a part is only available at low operating temperature of -40C and the application is called out at -55C, we have to test and evaluate the lower temperature performances.
Every IC part has its own Design Margins for in its low and high temperature failed limits, which are different from the figures that provided in the datasheet. Normally, it is not so much problems if the part is powered at a temperature, and gradually decreasing in environmental temperature, say from 0C to -40C or lower. The part is likely able to maintain operation, even though it is beyond the rated operating temperature (due to residual heat within the part or surroundings).
However, 0-70C rated part is questionable to pass low temperature soaking test. In this case, a part has to be soaked at low temperature, say -40C or -55C for hours or overnight, then the part is powered up at the soaking temperature. Some of 0-70C parts are unable to power-up properly, such as MCU, FGPA, CCD/CMOS sensors etc.. Similar reasoning can be said about operating at higher temperature environments. In any case, there maybe significant power-up time delays or other thermal related issues that it is not recommended to use 0-70C rated part for -40 to 125C application. There are too many unknowns and untested parameters for make the decisions.
Best,
Raymond
