MICROCHIP MCP4151-503E/P Digital Potentiometer learning notes

Now I am thinking of playing with digital potentiometer, instead of using KA431.


MICROCHIP MCP4151-503E/P  (Element14 - HK$7.64)

MicroChip MCP413X/415X/423X/425X 7/8-Bit Single/Dual SPI Digital POT with Volatile Memory

Description

The MCP41XX and MCP42XX devices offer a wide range of product offerings using an SPI interface. This family of devices support 7-bit and 8-bit resistor networks, and Potentiometer and Rheostat pinouts.

Description: IC, DGTL POT, SNGL, 50K, SPI, 8DIP; End To End Resistance:50kohm; Track Taper:Linear; Resistance Tolerance:± 20%; Supply Voltage Min:1.8V; Supply Voltage Max:5.5V; Potentiometer IC Case Style:DIP; No. of Pins:8; No. of S

8.0 APPLICATIONS EXAMPLES

Digital potentiometers have a multitude of practical uses in modern electronic circuits. The most popular uses include precision calibration of set point thresholds, sensor trimming, LCD bias trimming, audio attenuation, adjustable power supplies, motor control overcurrent trip setting, adjustable gain amplifiers and offset trimming. The MCP413X/415X/423X/425X devices can be used to replace the common mechanical trim pot in applications where the operating and terminal voltages are within CMOS process limitations (VDD = 2.7V to 5.5V).

Title Literature

AN1080 Understanding Digital Potentiometers Resistor Variations DS01080

AN737 Using Digital Potentiometers to Design Low Pass Adjustable Filters DS00737

AN692 Using a Digital Potentiometer to Optimize a Precision Single Supply Photo Detect DS00692

AN691 Optimizing the Digital Potentiometer in Precision Circuits DS00691

AN219 Comparing Digital Potentiometers to Mechanical Potentiometers DS00219

— Digital Potentiometer Design Guide DS22017

— Signal Chain Design Guide DS21825

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