ADG3304 input drive

Is it correct to assume the 36mA input current requirement is due to input capacitances at side A or Y? Does the part operate below that? please see below comment from customer:


“The input current drive requirement for the device driving ADG3304 is 36mA. This is quite a lot of current at 1.8V or 3.3V.

Does it operate if the drive current is lower like 1.6mA-5mA?


Even buffers don't have 36mA drive capability. Why the high requirement.”

  • 0
    •  Analog Employees 
    on Apr 18, 2018 3:44 AM

    Also, Is there a table for speed vs drive current?

  • 0
    •  Analog Employees 
    on Apr 18, 2018 3:55 AM

    Hi Yasmin,


    I'm moving this question to the Interface and Isolation community for answer.

    The 36mA is due to the automatic detection on the data direction of the ADG3304 which is needed in the worst case scenario. In reality, the input driving requirements are much less owing to the presence of the one-shot generators and if the switching speed requirements are low. Once the threshold value is achieved, the one-shot generator will kick in and help pull the voltage up or down as required, reducing the required current driving capability.


    There is no table for speed vs drive current available on the datasheet.



    Best Regards,