Operating temperature

现在很多厂商的datasheet中只有Operating temperature range.

请问芯片的规格温度是不是就是Operating temperature?

芯片能正常工作时表面所允许的最高温度.(壳温)

业内是怎么定义的?

一般來说，operating temperature 不等於 case temperature 或 junction temperature
operating temperature比較像是ambinet temperature. 是因为component vendor 的 reliability test 方式无法提供眞正的case/junction temperature, 電阻料就是最好的例子.
解決方式:
For general components (such as RAM......)
1.) 请vendor直接提供case temperature
2.) 请vendor提供该芯片的power dissipation, junction temperature and thermal resistance between case and junction, 透過公式可得case temperature
For mainchip( such as CPU),
1.) pls refer to related documents, there are specific measurement methods and judgement standards for different chips.

谢谢!
第二种方法中的power dissipation是额定功率吗?
但是Datasheetk　中好像不会提供power dissipation．只会提供一大串的电压和电流．
搞不清楚该用哪个电压与电流相乘算出power dissipation．