Potentiometers are frequently used in many electronic circuits. They are, moreover, used to make small manual adjustments to the current flow or the voltage in a circuit, or they are used to return resistors whose exact vales cannot be found. A digital potentiometer (also called a resistive digital-to-analog converter, or informally a digipot) is a digitally-controlled electronic component that mimics the analog functions of a potentiometer. It is often used for adornment and scaling analog signals by microcontrollers.
Digital potentiometers (digipots) are used to trim and scale analog signals. They provide an output resistance that is changeable based on digital inputs and so are, on occasion, referred to as resistive digital-to-analog converters (RDACs). Digipots are characteristically obtainable with linear or logarithmic tap points. In addition, Maxim offers some further variations of the basic digipot. Nonvolatile digipots retain their last programmed wiper position when the power supply is switched off. OTP digpots set the wiper’s power-on reset (POR) position to a user-defined value.
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Digital potentiometers present the advantages that they are programmable and their principles can be attuned automatically devoid of the need for physical modification. Digital potentiometers are electronic devices, typically in the form of integrated circuits. These devices can be used to restore the conservative passive potentiometers. Digital potentiometers are active devices and their procedure requires the supply of an appropriate electronic voltage to the chip.
Digital potentiometers can substitute the mechanical potentiometers and they present the recompense that they are programmable. The value of the confrontation at the center point can be diverse electronically by indoctrination of the chip. Each step of the resistor ladder has its own switch which can connect this step to the output terminal of the potentiometer. The chosen step on the ladder determines the resistance ratio of the digital poteinometer.
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Digital potentiometers are normally used in op-amp applications where a variable programmable gain is required. They are also used in many other electronic circuits such as analog filter circuits where a programmable changeable cut-off frequency is necessary. Global Digital Potentiometer IC Market is segmented by application into digital potentiometer can be used in any application where in general a trimming potentiometer or preset-resistor is used. The big advantage is that they can be controlled in the closed loop.
When used for tuning, re-calibration can be forbidden in closed loop. When used for alteration, re-calibration can be done by a micro-controller at defined intervals. They are used in; for example, brightness and contrast control of monitors, gain control or Wheatstone bridges and even digital analog converters. It is used as the volume control. They can be forbidden via up/down signals via button or rotatary encoder. Global Digital Potentiometer IC Market is segmented by Geographical Region into North America, Europe, China, Japan, Korea, and Taiwan. The Key Players include Maxim Integrated, Analog Devices, Texas Instruments, Microchip, ams, Vishay, ON Semiconductor, Intersil, Jameco Electronics, and Jotrin Electronics.
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