Other Parts Discussed in Thread: OPA189
I'm using a DAC91001 on my board for a 0-5V output span. Datasheet indicates that REFNF should be tied to a 0V when used in unipolar output.
The way it's done in the reference design (presented in the datasheet, please see below) is through a buffer made from an OPA189 with in+ tied to GND.
In the hope to simplify the (power rail) design. I'm wondering that:
1, can I simply tie the REFNF and REFNS to GND, omitting the buffer used here?
2. in this unipolar output config, can I use single supply for the OPA189 opamp? and
3. Can I use single supply on the DAC itself?
Thanks very much.