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CD4052B: CD4052B on-resistance at 3.3V

Paul Ren
Prodigy 640 points
Part Number: CD4052B

Hello,

Do you have any test data on CD4052 on-resistance at 3.3V Vdd? Does the on-resistance varies with current passing though? If yes, do you have a curve regarding the two parameters?

Thanks!

Paul

  • 0
    TI__Guru 52432 points

    Hi Paul,

    I am currently asking our design team to see if we have this data available; I will let you know as soon as I hear back from them.

    That being said I can help illustrate what affects Ron. Ron is dictated by switch architecture, supply voltage, and input voltage.

    A video explaining Switch Architecture can be found here, and one about Ron here.

    Current does not increase Ron.

    The CD4052B uses a transmission gate architecture to get a flatter Ron response curve, but as supply voltage starts to get lower, the Ron of the device, as well as flatness of the curve begin to suffer. This is shown in the datasheet at 5,10, and 15 volts. You can expect a slightly worse, more restive Ron graph for a lower Vdd. For illustration the Ron curves are shown below:

     

    Best,

    Parker

  • 0 in reply to Parker Dodson
    TI__Guru 52432 points

    Hi Paul,

    Unfortunately we do not have the data at 3.3V. We have some data at a few other points (25 C):

    At 2.3V

    When Vin = 0, Ron(ave) = 25.982 Ohms

    When VIn = VDD, Ron(ave) = 41.987 Ohms

    Peak Ron(ave) = 170.643 Ohms

    At 3V:

    When Vin = 0, Ron(ave) = 20.375 Ohms

    When Vin = VDD, Ron(ave) = 30.903 Ohms

    Peak Ron(ave) = 59.511 Ohms

    At 4.5V:

    When Vin = 0, Ron(ave) = 15.194 Ohms

    When Vin = VDD, Ron(ave) = 22.766 Ohms

    Peak Ron(ave) =30.778 Ohms

    This data won't give you Ron exactly at 3.3V, but it will give you a ball-park estimate of what you can expect.

    Best Regards,

    Parker Dodson