Transcription of Understanding Digital Potentiometer Resistor …
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Understanding Digital Potentiometer Resistor …
2007 Microchip Technology 1AN1080 INTRODUCTIONAll semiconductor devices have variations overprocess. In the case of Digital Potentiometer devices,this process variation affects the device resistiveelements (RAB -> RS and RW). These resistiveelements also have variations with respect to voltageand temperature, which will also be application note will discuss how process, voltage,and temperature affect the Resistor Network scharacteristics and specifications. Also, applicationtechniques will be covered that can assist in optimizingthe operation of the device to improve performance inthe process technology used also affects theoperational characteristics. We will focus on thecharacteristics for devices fabricated in assist with the discussions in this application note,the following terminology will be used. Figure 1illustrates several of these - The number of unique wiper positionsthat can be selected between Terminal B and Value - The value in the wiper register whichselects the one wiper switch to close so that the WiperTerminal is connected to the Resistor - The total resistance between the A Terminal andthe B Terminal.
© 2007 Microchip Technology Inc. DS01080A-page 3 AN1080 Devices with Multiple Potentiometers Some devices are offered that have two …
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