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ADG3304/8 Input driving requirements

Question asked by moto on Dec 27, 2012
Latest reply on Jan 13, 2013 by moto

Hi

 

ADG3304 and ADG3308 is same architecture device, I believe.

I found different description in datasheet.

ADG3304 data sheet requests lower output impedance <=150ohm / 36mA peak current capability for output driver.

ADG3308 data sheet doesn't have this description.

ADG3304/8 can drive about 1mA, I think.

 

For example .

     Vcc=5V

     Vlow th= 5X0.35= 1.75V

     (5-1.75)/6K= 541uA

     When Input level goes to below 1.75V, then change the output, I think.

 

1. Does ADG3308 inputs need 36mA peak current capability driver?

2. How come these requirements ,36mA and 150ohm ?

 

moto

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