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OPA378 1/f or Flicker Noise

Keith Keller
Expert 6230 points
Other Parts Discussed in Thread: OPA378, OPA348

Hello,

The OPA378 op amp shows 0 (zero) 1/f or Flicker noise.

Could you please explain why that is?

Thank you, Keith

  • 0
    TI__Guru 60400 points

    Keith,

    OPA348 clearly shows the 1/f input voltage noise  spectral density - see Fig 17 datasheet; it is 35nV/rt-Hz @ 1kHz and 650nV/rt-Hz @ 1Hz.  There is, however, no 1/f input current noise that is typical in CMOS op amps.