Absent a DAC, I need to drive an ADA4700-1 configured to produce from 0 to -38V. The design requires from 0 to 2.5v for this span. For a set of 8 fixed voltages, is it practical to use the ADG715 to switch a series of voltage dividers to drive my voltage source? (I call it a step attenuator)Roughly, this:
Stephen, I ended up driving an ADA4700 with an AD5683R. This combination provides precise setting of the output voltage. In future we might use the step attenuator idea. I appreciate your caution regarding resistance change with temperature.