半导体数字电位器：常见问题

• exists residual noise in the chips of approximately 10nv/sqrt(Hz) exists in the chips.

What do I need to know about the D input on the dallastats?

When powered up with the D input low (connected to GND), the wiper will move from one end to the other and back, continuously cycling up and down until the D input is taken high (or high impedance since there is an internal pull-up), after which both pushbutton inputs and the D input will operate correctly. (For example, the D input overrides the pushbutton inputs if low on power-up). On the other hand, when powered up with the D input either open or high (connected to VCC), a high-to-low transition on the D input will NOT move the wiper until AFTER one of the pushbutton inputs is activated.