I'd add that some digital isolators do not include a glitch filter, such as the ADuM140 series which use OOK signaling. The glitch filter adds directly to the propagation delay, so it may not be utilized in the chip design when the shortest delay is desired…

The following article shows the stack-up used for a six-layer board with multiple ADuM5411 devices, and may be a useful reference.

https://www.analog.com/en/analog-dialogue/articles/plc-dcs-analog-input-module-breaks-barriers-in-isolation.html

I'd also…

Hello Cuttlefish,

The ADuM1410/11/12 have the CTRL pin, which allows you to select the default output state (High or Low). The ADuM140/41/42 devices do not have this feature - instead you purchase a different part number with default Hi (e.g. ADuM141E1…

Hi Joseph.

Thank you for your answer.

I understood that our customers would not be able to decrease the supply current.

Our customer want to use the iCoupler with 1MBps.

And also they want to reduce an emission noise.

So, they want to use 2nd generation…

Kawa-san:

We looked at your formulas and this is how it should be:

I don’t think it is right to put negative sign. You should instead use (1 – duty cycle ) to calculate how much the TX will draw current from supply.

The correct formula should be…