• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 48 subscribers
  • Views 244 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

OPA2188: what's the relation between noise and temperature?

justifice zhou
Intellectual 400 points
Part Number: OPA2188

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?

  • 0
    TI__Guru* 93105 points

    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