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  • Comparing Digital Potentiometers to Mechanical Potentiometers
    Resistor potentiometers can be found in electronic circuits across a wide spectrum of applications. Most typically, they function in a voltage divider configuration in order to execute various types of tasks, such as offset or gain adjust. The two types of potentiometers compared
  • Optimizing the Digital Potentiometer in Precision Circuits
    Mechanical potentiometers are typically used to adjust system reference levels, gain errors and offset errors. Digital potentiometers can be used for the same functions while offering the added capability of digital adjustment control. Devices, such as Microchips MCP41XXX and MCP42XXX digital
  • Understanding Digital Potentiometers Resistor Variations
    AN1080 The Step Resistance (R )THE R RESISTANCE SAB Microchip offers Digital Potentiometer devices with The R resistance is the total resistance between AB resistances of 2.1 k?, 5 k?, 10 k?, 50 k?typical R Terminal A and Terminal B. The R resistance is really AB AB and 100 k?. These devices
  • How to choose the right potentiometer for reliable sensing
    Sensing potentiometers are often used in the design & development of solutions for industrial automation, medical equipment and devices, automotive R&D, forklifts, industrial doors, high end kitchen appliances and hand held tools like power tools. Potentiometers provide highly precise sensing
  • Communicating with Daisy Chained MCP42XXX Digital Potentiometers
    The MCP41XXX and MCP42XXX family of digital potentiometers allow for daisy chaining of multiple devices on a single SPI? bus. It is possible to communicate to multiple devices using one 3-wire data bus (CS, CLK and DATA), by connecting the SO pin on one device to the SI pin of the next device
  • Interfacing Microchip's MCP41XXX and MCP42XXX Digital Potentiometers to Motorola?s 68HC12 Microcontroller
    The MCP41XXX and MCP42XXX family of digital potentiometers communicate using a standard 3-wire SPI compatible interface. This application note will cover communication between these devices and the Motorola 68HC12 family of microcontrollers. Specifically, the MC68HC912B32 evaluation board was used.
  • Interfacing Microchip's MCP41XXX/42XXX Digital Potentiometers to a PICmicro Microcontroller
    The MCP41XXX and MCP42XXX family of digital potentiometers communicate using a standard 3-wire SPI compatible interface. This application note will discuss communications between these devices and a PIC16F876 microcontroller. The code supplied with this application note will include both absolute
  • Using Digital Potentiometers to Design Low-Pass Adjustable Filters
    The most common filter found in a data acquisition system signal path is a low-pass filter. This type of filter is usually used to reduce A/D Converter (ADC) aliasing errors. If there is more than one signal that is applied to the A/D converter through a multiplexer, each signal source may have its

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