Hi,
in the datasheet, the noise parameter input voltage noise and noise density are given in 25C.
Do we have a general guideline or equation what the noise will be in 85C?
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Hi,
in the datasheet, the noise parameter input voltage noise and noise density are given in 25C.
Do we have a general guideline or equation what the noise will be in 85C?
Hello Justifice,
Yes, the OPA2188 datasheet only provides the Input Voltage Noise Spectral Density at 25°C the temperature at which it is characterized. Op amp noise is made up of several different kinds of noise from which the specified noise is derived from. The noise type that has the strongest temperature dependency is the op amp thermal noise, while the other types of noise have a weak temperature dependency.
To approximate the noise at 85°C the 25°C input voltage noise (en) can be used as the basis:
This should get you close.
Regards, Thomas
Precision Amplifiers Applications Engineering