For the second part of my answer, I did mean A4953, sorry for the confusion.

The output voltages would be the supply voltage for the ADuM3220, but since this would be an output, a simple voltage divider would suffice to get the voltages in range for…

Hi Kawa, 

The Input ESD structures of the ADuM120N and ADuM121N will look like this:

And the output will look like this:

Regards,

Jason

Also Weidong, the ADuM1100/1200 are older generation products. The latest generation is ADuM110N (1-ch) and ADuM120N (2-ch). They are more cost-effective and have better performance and robustness.

Hi Ben:

You could try ADuM120N or ADuM121N. The power up glitch is resolved in design level.

For ADuM128x, we did not see this glitch on bench evaluation, if you really want it, we can double confirm with designer. please send mail to me via chris.qin…

Hi Kawa:

For ADuM120N:

IDD1 = IDD1(Q) + (2.8mA * D_A + 0.01mA/Mbps * F_A) + (2.8mA * D_B + 0.01mA/Mbps * F_B)

IDD2 = IDD2(Q) + (0.02mA/Mbps * F_A)+ (0.02mA/Mbps * F_B)

For ADuM121N:

IDD1 = IDD1(Q) + (2.8mA * D_B + 0.01mA/Mbps * F_B) +(0.02mA/Mbps * F_A…

Hi James,

Welcome to the world of digital isolation. I think you'll like it here!

Its no problem having 3.3V CMOS inputs and driving 5.0V TTL loads. The layout is simple. You just pick your favorite 2-channel device and two good 0.1uF bypass caps…