Logging the Linear Digital Potentiometer
Digital potentiometers (digital pots or digipots) are commonly used in volume-control applications. For audio applications, volume attenuation should closely mimic human hearing by applying a logarithmic scale. In some designs, a simple, low-cost linear potentiometer can be used in place of a logarithmic-taper
potentiometer (log pot). This application note details how to implement a linear potentiometer in a log-taper application using a small, low-cost, higher resolution digipot.
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