Digital potentiometer is a promising new electronic devices, in many areas can replace the traditional mechanical potentiometer. Its advantages are: high adjustment accuracy; no noise, long working life; no mechanical wear; data can be read and written; with configuration registers and data registers; multi-level volume storage function. It is widely used in instrumentation, computer and communication equipment, household appliances, healthcare products, industrial control and other fields. Any need to resistor for parameter adjustment and control of the occasion, can use digital potentiometer constitute programmable analog circuit. However, in practice, special attention should be paid to the digital potentiometer resistance adjustment error, due to different applications when the error affects different factors. Therefore, in practice, it is best to utilize the A/D conversion circuit for accurate measurement, and use the microcontroller to compensate for it. Typical Applications Adjusting LCD Display Voltage Control Replacing Mechanical Potentiometers Matching Linear Impedance Adjusting VCOM Settings Typical Applications Adjusting LCD Display Voltage Control Replacing Mechanical