Digital potentiometer is controlled by digital input and produces analog output. According to different digital potentiometers, the maximum tap current can range from several hundred microamperes to several milliamps. Digital potentiometer adopts numerical control to adjust the resistance value, which has obvious advantages such as flexible use, high adjustment precision, non-contact, low noise, anti-scaling, anti-vibration, anti-interference, small size and long service life, and can replace mechanical potentiometers in many fields. So what is the function of digital potentiometer?
Digital potentiometers are rapidly popularized at home and abroad, and are widely used in detection instruments, PCs, mobile phones, household appliances, modern office equipment, industrial control, medical devices and other fields.
For example: refrigerator, program controller, power supply, power meter, automatic detection equipment, optical fiber network, adjusting LCD screen, voltage control, replacing mechanical potentiometer, matching linear impedance, adjusting VCOM settings and so on.
Second, what is the use method of digital potentiometer?
1, when the chip select signal CS is low, the slider is allowed to move, when the U/D is high, the slider moves to the high end, and when it is low, the slider moves to the low end.
2. When the chip selection signal CS jumps from low level to high level, and INC is high level, the position of the slider is stored, and it will remain unchanged when the chip selection signal CS is powered off.
3. Keep the status quo when the chip select signal CS is at high level, and no action is allowed; When the chip select signal CS jumps from low level to high level and INC is low level, the initial state is restored and the storage point is cleared.