I would like to ask if any test result report for Radiated Emission is available for ADI iCoupler, especially for ADuM2401 and ADuM4401?
我们有使用ADUM4401 作为一、二次侧信号隔离与数据传送隔离. 但做surge 测试时却发现有时isolator input low, output 却变成为high(如下图Ch4), 想请问：
C1: VCC1, C3: Isolator pin4(INB), C4: Isolator pin1３(OUTB)
ADuM4401 output is push-pull structure.
Isouce and Isink should be 4mA limit to guarantee output logic. this data is specified in test condition of Voh and Vol.
The ADuM4401 has a watch-dog timer on the receiver side which puts the device into a default High state if there are no signal pulses across the transformer. See this excerpt from the data sheet:
I suspect that the surge test is interfering…
From the additional information you provided it might be attributed to latchup. I was curious if you have used the ADuM4401 before. This part is mentioned in the app note AN-793 linked below.http://www.analog.com/media/en/technical-documentation…
We recommend referencing the input circuitry to the isolated Analog ground. See this post for more information:
You might also consider a 4-channel digital isolator for the SPI interface as an…