video decoder ADV7280 has a pin which requires 1.8v analog input. so, how design a 1.8v analog supply power and if I replace it by 1.8v digital, this is acceptable? thanks!
What input voltage do you have for designing the 1.8V analog input? The easy way for design the power supply is using the ADIsimPower. It is advisable to provide separate regulated supplies for each circuit group (AVDD, DVDD, DVDDIO,PVDD) and ensure the proper isolation.
Please check the Eval board schematic for reference: ADV7280 Evaluation Board Files.zip from ADV7280 / ADV7280-M Design Support Files
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