The temperatures in a car can fluctuate drastically depending on the time of the year, geographical location the car is, and the location of the amplifier in the vehicle. This is why automotive devices need to be able to operate within a larger range of temperatures. While 25°C is a commonly used ambient temperature, in automotive, 75°C-85°C is typically the ambient temperature for thermal tests. This creates a more streneous test condition as the ambient is closer to the maximum operating junction temperature of the amplifier.