Digital potentiometer controlled by the digital input to produce an analog output. Depending on the digital potentiometer, the maximum value of the tap current can be from a few hundred microamps to a few milliamps. Digital potentiometer using numerical control to adjust the resistance value, has the use of flexible, high precision adjustment, no contact, low noise, not easy to stain, anti-vibration, anti-interference, small size, long life and other significant advantages, can be in many areas to replace the mechanical potentiometer. So what is the role of the digital potentiometer?
Digital potentiometers are being rapidly promoted at home and abroad, and a large number of applications in testing instruments, PCs, cell phones, household appliances, modern office equipment, industrial control, medical equipment and other fields.
For example: refrigerators, programmable control machines, power supplies, power meters, automatic testing equipment, fiber optic networks, adjusting the LCD display, voltage control, replacing the mechanical potentiometer, matching linear impedance, adjusting the VCOM settings and so on.
Second, what is the use of digital potentiometer
1, the chip selection signal CS is a low level allows the slider to move, U/D is a high level when the slider to the high end of the slider to move to the low end of the slider for low.
2. When the chip select signal CS jumps from low level to high level, and INC is high level, the slider position is stored, and the position is still maintained when power is turned off and turned on next time.
3. When the chip select signal CS is high, the status quo is maintained and no action is allowed; when the chip select signal CS jumps from low to high and INC is low, the initial state is restored and the memory point is cleared.