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OPA4209: Channel separation vs frequency data

Alexander Kaliadin
Prodigy 120 points
Part Number: OPA4209
Other Parts Discussed in Thread: OPA209, OPA2209,

Hi,

Is channel separation vs frequency plot available for quad version? It is not in a datasheet unfortunately. Or at the bare minimum, data at 1Khz or 10Khz please?

Cheers,

Alex

  • 0
    TI__Guru* 93105 points

    Hi Alex,

    I searched the design archive and found channel separation information for the OPA2209, the dual version of the OPA209. There wasn't anything specific for the OPA4209, but the results should be nearly identical because the quad op amp is the dual with a symmetrical flip. The architecture and layout that the OPA4209 uses results in very high channel separation at 1 kHz and 10 kHz as seen in the graphs.

    Regards, Thomas

    Precision Amplifiers Applications Engineering

  • 0 in reply to Thomas Kuehl
    Prodigy 120 points
    Hi Thomas,

    Thanks a lot for getting back to me on this. 604 Ohm plot looks pretty good. What was a signal level for these test conditions? In my case voltage swing can reach +/10V, I am curious if these is also a signal level dependency here as well.

    Regards,
    Alex
  • 0 in reply to Alexander Kaliadin
    TI__Guru* 93105 points

    Hi Alex,

    The driven section of the op amp is set up for a gain of +100 V/V (40 dB), with an input level of 50 mVRMS (141.4 mVp-p) applied to the non-inverting input. Thus, its output is swinging about 14.14 Vp-p. The other amplifier(s) for which the cross-talk is being measured are connected as a unity-gain buffer. A dual supply is used and its non-inverting input is connected to GND (0 V).

    I hope this helps.

    Regards, Thomas

    Precision Amplifiers Applications Engineering

  • 0 in reply to Thomas Kuehl
    Prodigy 120 points

    Awesome.

    Thanks Thomas