Digital Potentiometer Circuit Diagram. An691 optimizing the digital potentiometer in precision circuits. For the mcp4xxxx family of potentiometers the number of bits is eight.
An691 optimizing the digital potentiometer in precision circuits. This shutdown mode may be achieved by a hardware pin shdn or via software through the terminal control tcon register s. The prototyping shield has convenient 5v and gnd rails and arduino pins are brought to the top level but would add some confusion when diagrammed.
Digital potentiomter working internal structure applications.
When keys s1 and s2 are open resistors r8 and r9 hold the inputs of ic2d a nand as well as the u d input of ic1 high. The ground is all the way off terminal 2 is the switch itself and terminal 3 is the switch turned all the way up. With the mcp4xxxx 8 bit digital potentiometers the pro grammable digital code ranges from 0 to 28 1 or 255. The terminal 2 is connected to the wiper.
