You are right - there is a typo in the ADuM14x datasheet. For the Quiescent current tables for the ADuM141 and ADuM142 the Test Conditions for the ADuM140 is correct, the ADuM141 and ADuM142 Conditions need to be changed to match the ADuM140…
Actually the pull-up function is not realized by resistor but a weak current source. Its typical value is 3uA when EN is tied to its reference ground. we would suggest to connect it to VDD if the application is noisy.
I am looking for an isolator that operates with Vdd1=2.5V and Vdd2=3.3V. (Vdd1 side has 2.5V logic levels)
In the datasheets for ADuM1400 and 3480 I read that the output goes to a default state when no transitions occur on the input within 5us.
Our customer want to know the supply current.
I already asked about this and you gave me ADuM142's spread sheet.
(ADuM140)Supply current with OOK.
Can you give me the same thing for ADuM140?
Also , ADI's newest iCoupler series…
Beside isolation, can ADuM140 and ADuM 220 work as level shifter as well? For example VDD1 as 1.8V, VDD2 as 5V or 3.3V.
We don't have such a comparison table now, but in the datasheet of ADuM140D/ADuM140E you will find that "ADuM140E1 pin compatible with ADuM1400" rather than ADuM1410.
1. The "units" means different channels of different ADuM3440( eg: between ch1 of one ADuM3440 and ch2 of the other)
2. Yes, tPSKCD is the propagation delay between any two channels of a given ADuM3440.
3. tPSK and tPSKCD are tested…
I am planning to use the ADUM140E to convert 3.3V GPIO from an FPGA to 5V to interface with digital I/O on a servo drive. The servo drive DIO are active low and use opto-isolators with 50mA max drive. I have a couple of questions about the iCoupler:
The following article shows the stack-up used for a six-layer board with multiple ADuM5411 devices, and may be a useful reference.
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…