Digital Potentiometers

What is a Digital potentiometer?
Digital Potentiometers are a three terminal device, two fixed end terminals and one wiper terminal which is used to vary the resistance.
A Digital potentiometer also known as digipot, is similar to a standard analogue potentiometer, which is a variable resistor except the digital potentiometer has an integrated chip (IC) that accepts a signal input rather than the physical movement of a shaft or slide for adjustment. Potentiometers physically change the resistance value whereas digital potentiometers modify the resistance value via digital inputs rather than a rotary wheel or a slider.
Where might I use one?
Digital potentiometers would be beneficial where environmental factors would impact a mechanical potentiometer in areas where there is vibration, dust, moisture or grease as digital potentiometers are encapsulated they offer better protection, they are also less vunerable to vibration Digital potentiometers are used to calibrate system tolerances or control system parameters.

What are the advantages over a mechanical potentiometer?
Digital potentiometers can be operated in a closed control loop and don’t need physical access to be adjusted. . They offer better stability and reliability and as digital will offer additional functionality, some even have on - chip memory
Applications
• System calibration
• Process control
• Sensor calibration
• Smart actuator
• Voltage margining
• Programmable power supplies
• Volume control
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Part Details Brand Stock Control Interface Resistance Value Number of Positions Taper Type Memory Type Number of Pots per Package Mounting Type Package Type Pin Count Power Supply Type Typical Single Supply Voltage Typical Dual Supply Voltage Dimensions Height Length Width Maximum Operating Temperature Minimum Operating Temperature
MCP4661T-502E/ML, Digital Potentiometer 5kΩ 257-Position Log 2-Channel I2C 16-Pin QFN Microchip Technology 3300 I2C 5kΩ 257 Log Non-Volatile 2 Surface Mount QFN 16 Single - - 4 x 4 x 0.95mm 0.95mm 4mm 4mm +125 °C -40 °C
MCP4261-502E/ST, Digital Potentiometer 100kΩ 129-Position 2-Channel SPI 14-Pin TSSOP Microchip Technology 384 SPI 100kΩ 129 - Non-Volatile 2 Surface Mount TSSOP 14 Single Maximum of 5.5 V - 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 4.5mm +125 °C -40 °C
MCP4451-503E/ST, Digital Potentiometer 100kΩ 257-Position Linear 4-Channel Serial-I2C 20-Pin TSSOP Microchip Technology 296 Serial-I2C 100kΩ 257 Linear Volatile 4 Surface Mount TSSOP 20 Single Maximum of 5.5 V - 6.6 x 4.5 x 1.05mm 1.05mm 6.6mm 4.5mm +125 °C -40 °C
MCP45HV51-103E/MQ, Digital Potentiometer 100kΩ 256-Position Linear Serial-I2C 20-Pin QFN Microchip Technology 292 Serial-I2C 100kΩ 256 Linear Volatile 1 Surface Mount QFN 20 Dual 1.5 V 3.5V 5 x 5 x 0.95mm 0.95mm 5mm 5mm +125 °C -40 °C
AD5160BRJZ10-RL7, Digital Potentiometer 10kΩ 256-Position Linear SPI 8-Pin SOT-23 Analog Devices 0 SPI 10kΩ 256 Linear - 1 Surface Mount SOT-23 8 Single 2.7 → 5.5 V - 3 x 1.7 x 1.3mm 1.3mm 3mm 1.7mm +125 °C -40 °C
AD5160BRJZ10-RL7, Digital Potentiometer 10kΩ 256-Position Linear SPI 8-Pin SOT-23 Analog Devices 0 SPI 10kΩ 256 Linear - 1 Surface Mount SOT-23 8 Single 2.7 → 5.5 V - 3 x 1.7 x 1.3mm 1.3mm 3mm 1.7mm +125 °C -40 °C
AD5160BRJZ100-RL7, Digital Potentiometer 100kΩ 256-Position Linear SPI 8-Pin SOT-23 Analog Devices 0 SPI 100kΩ 256 Linear - 1 Surface Mount SOT-23 8 Single 2.7 → 5.5 V - 3 x 1.7 x 1.3mm 1.3mm 3mm 1.7mm +125 °C -40 °C
AD5160BRJZ100-RL7, Digital Potentiometer 100kΩ 256-Position Linear SPI 8-Pin SOT-23 Analog Devices 0 SPI 100kΩ 256 Linear - 1 Surface Mount SOT-23 8 Single 2.7 → 5.5 V - 3 x 1.7 x 1.3mm 1.3mm 3mm 1.7mm +125 °C -40 °C
AD5170BRMZ2.5, Digital Potentiometer 2.5kΩ 256-Position Linear I2C, Serial-2 Wire 10-Pin MSOP Analog Devices 0 I2C, Serial-2 Wire 2.5kΩ 256 Linear Volatile 1 Surface Mount MSOP 10 Single 2.7 → 5.5 V - 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 3.1mm +125 °C -40 °C
AD5170BRMZ2.5, Digital Potentiometer 2.5kΩ 256-Position Linear I2C, Serial-2 Wire 10-Pin MSOP Analog Devices 0 I2C, Serial-2 Wire 2.5kΩ 256 Linear Volatile 1 Surface Mount MSOP 10 Single 2.7 → 5.5 V - 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 3.1mm +125 °C -40 °C
AD5203ARZ10, Digital Potentiometer 10kΩ 64-Position Linear Serial-3 Wire 24-Pin SOIC Analog Devices 0 Serial-3 Wire 10kΩ 64 Linear - 1 Surface Mount SOIC 24 Single 2.7 → 5.5 V - 15.6 x 7.6 x 2.35mm 2.35mm 15.6mm 7.6mm +85 °C -40 °C
AD5203ARZ10, Digital Potentiometer 10kΩ 64-Position Linear Serial-3 Wire 24-Pin SOIC Analog Devices 0 Serial-3 Wire 10kΩ 64 Linear - 1 Surface Mount SOIC 24 Single 2.7 → 5.5 V - 15.6 x 7.6 x 2.35mm 2.35mm 15.6mm 7.6mm +85 °C -40 °C
AD5207BRUZ100, Digital Potentiometer 100kΩ 256-Position Linear Serial-3 Wire 14-Pin TSSOP Analog Devices 0 Serial-3 Wire 100kΩ 256 Linear Non-Volatile 1 Surface Mount TSSOP 14 Dual, Single 2.7 → 5.5 V ±2.2 to ±2.7V 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm 4.5mm +125 °C -40 °C
AD5207BRUZ100, Digital Potentiometer 100kΩ 256-Position Linear Serial-3 Wire 14-Pin TSSOP Analog Devices 0 Serial-3 Wire 100kΩ 256 Linear Non-Volatile 1 Surface Mount TSSOP 14 Dual, Single 2.7 → 5.5 V ±2.2 to ±2.7V 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm 4.5mm +125 °C -40 °C
AD5242BRZ100, Digital Potentiometer 100kΩ 256-Position 2-Channel Serial-2 Wire, Serial-I2C 16-Pin SOIC Analog Devices 0 Serial-2 Wire, Serial-I2C 100kΩ 256 - Volatile 2 Surface Mount SOIC 16 Dual, Single 3 V, 5 V ±2.5V 10 x 4 x 1.5mm 1.5mm 10mm 4mm +105 °C -40 °C
AD5243BRMZ10, Digital Potentiometer 10kΩ 256-Position Linear 2-Channel 10-Pin MSOP Analog Devices 0 - 10kΩ 256 Linear Non-Volatile 2 Surface Mount MSOP 10 Single 2.7 → 5.5 V - 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 3.1mm +125 °C -40 °C
AD5243BRMZ10, Digital Potentiometer 10kΩ 256-Position Linear 2-Channel I2C, Serial-2 Wire 10-Pin MSOP Analog Devices 0 I2C, Serial-2 Wire 10kΩ 256 Linear Non-Volatile 2 Surface Mount MSOP 10 Single 2.7 → 5.5 V - 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 3.1mm +125 °C -40 °C
AD5243BRMZ100, Digital Potentiometer 100kΩ 256-Position Linear 2-Channel I2C, Serial-2 Wire 10-Pin MSOP Analog Devices 0 I2C, Serial-2 Wire 100kΩ 256 Linear Non-Volatile 2 Surface Mount MSOP 10 Single 2.7 → 5.5 V - 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 3.1mm +125 °C -40 °C
AD5243BRMZ100, Digital Potentiometer 100kΩ 256-Position Linear 2-Channel I2C, Serial-2 Wire 10-Pin MSOP Analog Devices 0 I2C, Serial-2 Wire 100kΩ 256 Linear Non-Volatile 2 Surface Mount MSOP 10 Single 2.7 → 5.5 V - 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 3.1mm +125 °C -40 °C
AD5248BRMZ2.5, Digital Potentiometer 2.5kΩ 256-Position Linear 2-Channel I2C, Serial-2 Wire 10-Pin MSOP Analog Devices 0 I2C, Serial-2 Wire 2.5kΩ 256 Linear Non-Volatile 2 Surface Mount MSOP 10 Single 2.7 → 5.5 V - 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 3.1mm +125 °C -40 °C
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