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TINA/Spice/TINA-TI: Noise measurement - OPA2333P

Kiran Gopalaiah
Intellectual 710 points
Part Number: TINA-TI
Other Parts Discussed in Thread: OPA2333

Tool/software: TINA-TI or Spice Models

Hi,

Need help to understand how to measure noise contribution from  individual components in the circuit through simulation (Example R1,R2, R3 etc )

  • 0
    TI__Genius 15700 points

    Hello Kiran,

    This can be accomplished by running a noise analysis in TINA-TI (found under Analysis > Noise Analysis). In order to view the noise contribution of an individual resistor, you will have to manually set the temperature of all other resistors to an absolute temperature of -273.15 as shown below. This effectively "turns off" the resistor thermal noise for each of the resistors.

     

    Unfortunately it is not straightforward to disable the noise contribution from the OPA2333 model in the simulation. It should be possible, however, to compare the noise of the circuit with all resistors' noise disabled (which will capture the noise contribution from the OPA) with analyses of each resistor's noise contribution.

    More information on noise analysis can be found in our TI Precision Labs series on the subject, which can be found here: https://training.ti.com/ti-precision-labs-op-amps-noise-1

  • 0 in reply to Alex Davis
    Intellectual 710 points

    Alexander Davis,

    Greetings and thanks for the reply.

    Will try the method you have suggested.

    I have gone through  TI tutorials. It dose not discuss about noise measurement of individual components.