When I choose external reference for ADuC7026's ADC, which should I choose external Vref at the point of view about output current ?
I cannot find a specification of external reference on ADuC7026 (Rev.F) datasheet.
Thank you for your help in advance.
As in the data-sheet specified - a external reference should be in the range from 0.625V to AVDD.
As can be expected the output current to the Vref input isn't that big - so as a guidance you can start with the ADR291 specifications- we placed on the evaluation-boards.