1)As for your ADuM5404, what are your min and max of Vuv+ and Vuv-? As for our reference.....pls let us know.
2)How can I think this value? Will Min and Max come form VIH/VIL correct?
Kaos: I asked the designer and he replied that the minimum negative UVLO should be more than 2.0V. He thinks you should try the ADuM5404 in your system.
This value are not put on your datasheet.
So as an aim in my design, what values should I think?
Kaos: I am checking with the Test Engineer.
I am still waiting for your reply.
Kaos: We do not have a specification of min and max for Vuv+ or Vuv-. I have asked the test engineer for characterization data, but he says it will take some time to put that together.
Thanks for your continuously follow up.
The info what I need is how can I think this ratings, if you dont have min/max data.
In other word, what does the factor affect to this ratings?
Maybe ??% is your secret value....if so, I welcome the your viewpoint only.
I asked the test engineer for Vuv data, but this is a typical value and was not characterized, so there are no known min or max values for Vuv, just the typical values. The positive going threshold is 2.7V, so for rising supply voltages VDD1 and Viso above 2.7V the channels will be active. The negative going threshold is 2.4V, so for so for falling supply voltages VDD1 and Viso below 2.4V the channels will be inactive.
Can you please state the reason why you are asking for the min and max value of Vuv?
Our product make happen a noise signal, when the supply voltage make change down to less than 2V.We can confirm this when power on and off.
And we can confirm as below comment on your datasheet Rev.c.
--- the start of quote ---(1)POWER CONSIDERATIONS The ADuM5404 power input, data input channels on the primary side, and data channels on the secondary side are all protected from premature operation by undervoltage lockout (UVLO) circuitry. Below the minimum operating voltage,the power converter holds its oscillator inactive and all input channel drivers and refresh circuits are idle. Outputs remain in a high impedance state to prevent transmission of undefined states during power-up and power-down operations.
(2)table 5. Undervoltage Lockout Positive Going Threshold:2.7V(typ) Negative Going Threshold:2.4V(typ)--- the end of quote ---
So if the min-value of UVLO threshold ADuM5404 is larger than 2V, then we do our good design for our product, I think.
Can you toss your good comment to me?
Kaos: I asked the designer if he can respond to your question, but he is away for Chinese New Year until Monday Feb 9th.
Ah,,,,,Ok,I am still waiting for your answer.
I got it.
So we can proceed our job to forward.
Retrieving data ...