Can input the logic signal before power-up?
Datasheet say , “Digital Input and output voltage to GND” is 0V,+7V.
So AD5290's logic pin should be able to give the voltage higher than Vdd.
Could I make sure that?
The specification that you mentioned is under the ABSOLUTE MAXIMUM RATINGS section. Take note that this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Also, take note that the part has a suggested ideal power-up sequence. The ideal power-up sequence is as follows: GND, VDD, VSS, digital inputs, and VA/VB/VW. The order of powering VA, VB, VW, and the digital inputs is not important, as long as they are powered after VDD/VSS .
Thank you very much for your support.
I worry that an ESD diode may be between a digital inputs and Vcc.
"The specification that you mentioned is under the ABSOLUTE MAXIMUM RATINGS section."
Your mention means there isn't the pass to vcc from digital inputs, I understood.
There is an ESD protection circuit for the digital pins. It is under the ESD PROTECTION section of the data sheet.
I should have read the datasheet more.
Thank you so much!!
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