Hey Everyone,
Could someone explain to me how a digital potentiometer works and how I could use it?
Thanks!
Could someone explain to me how a digital potentiometer works and how I could use it?
Thanks!
Yeah, I thought that was how it worked, but when I look at some of the digital potentiometer IC's they dont seem to work that way... They dont have switches for the "High" and "Low."Gee, that's a mighty general question.
But basically, you supply a digital pot with voltages for both "ends" (sometimes labeled H and L for high and low) and you get a voltage between those two at the "wiper" (sometimes labeled "W") depending upon the binary input that you supply it.
Some digital pots use parallel binary data, some use serial binary data. Also, the "H", "L" and "W" terminals are usually limited to the range of the digital pots' supply voltages.
How can you use it? Lots of ways. Usually for establishing some kind of low-current reference voltage or input to an opamp or other high-impedance circuit.
Those aren't switches; they are the opposite "ends" of the digital pot.Yeah, I thought that was how it worked, but when I look at some of the digital potentiometer IC's they dont seem to work that way... They dont have switches for the "High" and "Low."