switches electronic model

sir:

   ADI do not provide spice model for switch ADG5412. But the "off isolaltion" characteristic of ADG5412 is a main problem that exist in my design. So I want to do some simluation about ADG5412.  I have a few question that need to be answered first before my simulation.

(1) When the switch is in off state,  there are parameters Cd(Off),Cs(Off). What does Cd and Cs stand for? what is the capacitance bewteen

Drain and Source? Is the Cds equal to the sum of Cd and Cs?

(2) What is the electronic model when the switch is in off state? If we assume off resistance is infinite, can we think that the electronic model of the switch is a capacitance with value equal to  Cds?

Thanks!

Regards

Jacky

2012-11-15

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  • Sean:

         Thans for your reply!

          I have carefully learned the 'MT-088 tutorials'. I find that if I want to simulate the ac performance of the switch, I have to know the parameter of Cds. If I want to simulate the corsstalk of two adjenct channel, I have to know the parameter of Css and Cdd. But in the datasheet for ADG5412, I can not find these parameters. Sir, where can I find these parameters?

    Thanks

    Regards

    Jacky

    2012-11-16

Reply
  • Sean:

         Thans for your reply!

          I have carefully learned the 'MT-088 tutorials'. I find that if I want to simulate the ac performance of the switch, I have to know the parameter of Cds. If I want to simulate the corsstalk of two adjenct channel, I have to know the parameter of Css and Cdd. But in the datasheet for ADG5412, I can not find these parameters. Sir, where can I find these parameters?

    Thanks

    Regards

    Jacky

    2012-11-16

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