Does the ADV7403 need special power-up/down sequence for 3.3V and 1.8V?
The recommended power-up sequence is to power up the 3.3 V supplies first, followed by the 1.8 V supplies.
For power down, the supplies may be de-asserted simultaneously as long as a higher rated supply does not go below a lower rated supply.
Thank you for the recommendation regarding power - on sequence.
In my design I have provide 3.3V, 1.8V Analog and Digital Power Supply Simultaneously.
In the datasheet, or reference manual I did not find the recommended power-on sequence.
Please suggest me, whether I must provide 3.3V before 1.8V supply.
Please provide your suggestion and any concerned inputs.
Murali P T
The power on and off recommendations are described above.
It's ok to power on the 3.3V and 1.8V simultaneously as long as the 1.8V supply does not exceed the 3.3V on power up or power down.
Both supplies simultaneously powered on.
I could able to read I2C registers of ADV 7403.
I hope this power sequence working fine.
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