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ADS1263: Reference out @ +/- 2.5V supply

Part Number: ADS1263


Hello,

May I know if the REFOUT pin be able to output 2.5V if the AVDD and AVSS are supplied with +/- 2.5 V?  (DVDD is 3.3V)

Is the REFOUT stable if AVDD varies about 2.5V?

I assume that the reference circuit is powered from the AVDD.  So I have these questions.

Thank you!

Kenny