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DP83867CR: Triple/Dual Supply Mode Pros and Cons

Part Number: DP83867CR

Hello TI, I have not seen it mentioned anywhere, but what are the pros and cons of running dual or triple supply mode beside dual supply has higher power consumption, does not need additional 1.8V regulator and power up sequence. Does one has better performance, noise radiation/immunity or other difference over the other? What does +1.8V supply do for the chip?