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TMS320F28379D: Single ended ADC read and connection.

Part Number: TMS320F28379D
Other Parts Discussed in Thread: TMDSCNCD28379D, C2000WARE

Hi, 

I am using 28379D with docking station. I have a doubt in back converting ADC results. 

I am not connecting Vrefhi to any pins. 

What will be the analog value say for 4096?

Is it 3V/3.3V/2.5V?

And should i connect any external power supply with 3.3V/3V to Vrefhi pin (PIn 45) on control card?