AnsweredAssumed Answered

AD7779 internal reference

Question asked by alex.ba 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.

 

Alex

Outcomes