Confusion regarding peak power and continuous power consumption for ADG1404

I am using the mux using ±15V of supply. I'll be passing signals with voltages between ±3V through the analog mux and a max (passthrough) current of 50mA. I'll be using +15V for 'enable' input (always 'ON') and +3.3V for mux control input. Now looking at the datasheet the max current Idd is 285uA and the max current Iss is 1uA. So the operating power consumption should be equal to 15V*285uA + 15V*1uA=4.29mW. 

Now at  ±15V, the max Ron is 2.6 so the power dissipation for a current of 50mA is (50mA)^2 * 2.6 = 6.5mW. So the total worst-case power consumption (please correct me if my calculations are wrong) should be  6.5+4.29=10.79mW

But now when I try to simulate a similar (in terms of capacitance, resistance, and power requirements) model ADG1436 (since ADG1404 is not available): 



I see that when the control input changes from low to high (0->3.3), there is a peak current of around 68mA at +15V (green, I(V3)) line and -68mA at -15V (red, I(V2)) line. So total power would be 15V*68mA+15V*68mA =2.04W. Which seems way too much for a switch. Could someone clarify the continuous power and peak power consumption for ADG1404?

Thank you.



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[edited by: paulplusx at 10:50 PM (GMT -4) on 19 Mar 2021]
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  • +1
    •  Analog Employees 
    on Mar 30, 2021 2:33 AM

    Hi Paul,

    Upon looking into this, the current of around +/-68 mA is a transient response that only lasts for about 3 ns. We haven't modeled these Idd/Iss parameters yet. May we know your application, and is the power consumption is your top priority in your design and simulations?

    Both the ADG1404 and ADG1436 have a continuous current per channel rating of up to 400 mA.

    Best regards,
    Christian

Reply
  • +1
    •  Analog Employees 
    on Mar 30, 2021 2:33 AM

    Hi Paul,

    Upon looking into this, the current of around +/-68 mA is a transient response that only lasts for about 3 ns. We haven't modeled these Idd/Iss parameters yet. May we know your application, and is the power consumption is your top priority in your design and simulations?

    Both the ADG1404 and ADG1436 have a continuous current per channel rating of up to 400 mA.

    Best regards,
    Christian

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