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AD7779 internal reference

Question asked by on Aug 3, 2017
Latest reply on Aug 7, 2017 by Lluis

While planning to use the internal reference of the AD7779, I left unconnected the REFx+ and REFOUT pins (and connected the REFx- to AVSS). Tha ADC looks to works fine, but i experience a very large level of input refered noise.


Looking back to the datasheet, Figure 98, the internal reference schematic show the REFOUT pin connected to REFx+.

So it is unclear to me what is the correct way to use the internal reference for this ADC.