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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Description Price 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
RS Stock No. 144-9093
Mfr. Part No.MCP41010-E/P
BrandMicrochip
PHP62.425
Each (In a Tube of 60)
units
Serial-SPI 10kΩ 256 Linear - 1 Through Hole PDIP 8 Single 3.3 V, 5 V - 9.27 x 6.35 x 3.3mm 3.3mm
RS Stock No. 403-676
Mfr. Part No.MCP41010-E/P
BrandMicrochip
PHP74.432
Each (In a Pack of 5)
units
Serial-SPI 10kΩ 256 Linear - 1 Through Hole PDIP 8 Single 3.3 V, 5 V - 9.27 x 6.35 x 3.3mm 3.3mm
RS Stock No. 158-0157
Mfr. Part No.AD5254BRUZ100
PHP236.265
Each (In a Tube of 75)
units
Serial-2 Wire, Serial-I2C 100kΩ 256 Linear Non-Volatile 4 Surface Mount TSSOP 20 Dual, Single 3 V, 5 V ±2.5V 6.5 x 4.4 x 1.05mm 1.05mm
RS Stock No. 538-4858
Mfr. Part No.AD5254BRUZ100
PHP303.97
Each
units
Serial-2 Wire, Serial-I2C 100kΩ 256 Linear Non-Volatile 4 Surface Mount TSSOP 20 Dual, Single 3 V, 5 V ±2.5V 6.5 x 4.4 x 1.05mm 1.05mm
RS Stock No. 403-654
Mfr. Part No.MCP41100-E/P
BrandMicrochip
PHP79.918
Each (In a Pack of 5)
units
Serial-SPI 100kΩ 256 Linear - 1 Through Hole PDIP 8 Single 3.3 V, 5 V - 9.27 x 6.35 x 3.3mm 3.3mm
RS Stock No. 144-5722
Mfr. Part No.MCP41100-E/P
BrandMicrochip
PHP62.425
Each (In a Tube of 60)
units
Serial-SPI 100kΩ 256 Linear - 1 Through Hole PDIP 8 Single 3.3 V, 5 V - 9.27 x 6.35 x 3.3mm 3.3mm
RS Stock No. 912-7463
Mfr. Part No.AD8403ARZ10
PHP312.562
Each (In a Tube of 31)
units
Serial-3 Wire, Serial-SPI 10kΩ 256 Linear Volatile 4 Surface Mount SOIC W 24 Single 3 V, 5 V - 15.6 x 7.6 x 2.35mm 2.35mm
RS Stock No. 523-7386
Mfr. Part No.AD8403ARZ10
PHP372.23
Each
units
Serial-3 Wire, Serial-SPI 10kΩ 256 Linear Volatile 4 Surface Mount SOIC W 24 Single 3 V, 5 V - 15.6 x 7.6 x 2.35mm 2.35mm
RS Stock No. 738-6799
Mfr. Part No.MCP4017T-104E/LT
BrandMicrochip
PHP24.492
Each (In a Pack of 5)
units
Serial-I2C 100kΩ 128 Linear Volatile 1 Surface Mount SC-70 6 Single 1.8 → 5.5 V - 2 x 1.25 x 1mm 1mm
RS Stock No. 165-3382
Mfr. Part No.MCP4017T-104E/LT
BrandMicrochip
PHP18.725
Each (On a Reel of 3000)
units
Serial-I2C 100kΩ 128 Linear Volatile 1 Surface Mount SC-70 6 Single 1.8 → 5.5 V - 2 x 1.25 x 1mm 1mm
RS Stock No. 158-5280
Mfr. Part No.AD5201BRMZ10
PHP76.041
Each (In a Tube of 50)
units
Serial-3 Wire, Serial-SPI 10kΩ 33 Linear Volatile 1 Surface Mount MSOP 10 Dual, Single 3 V, 5 V ±2.5V 3 x 3 x 0.85mm 0.85mm
RS Stock No. 159-6629
Mfr. Part No.MCP4641-103E/ST
BrandMicrochip
PHP46.20
Each (In a Tube of 96)
units
Serial-2 Wire, Serial-I2C 10kΩ 128 - Non-Volatile 2 Surface Mount TSSOP 14 Single 2.5 V, 3.3 V, 5 V - 5 x 4.4 x 1mm 1mm
RS Stock No. 230-703
Mfr. Part No.AD8400ARZ10
PHP158.944
Each (In a Pack of 5)
units
Serial-3 Wire, Serial-SPI 10kΩ 256 Linear Volatile 1 Surface Mount SOIC 8 Single 3 V, 5 V - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 145-8959
Mfr. Part No.MCP4651-103E/ST
BrandMicrochip
PHP40.95
Each (In a Tube of 96)
units
Serial-2 Wire, Serial-I2C 10kΩ 256 - Volatile 2 Surface Mount TSSOP 14 Single 2.5 V, 3.3 V, 5 V - 5 x 4.4 x 1mm 1mm
RS Stock No. 412-804
Mfr. Part No.AD8402ARZ10
PHP250.43
Each
units
Serial-3 Wire, Serial-SPI 10kΩ 256 Linear Volatile 2 Surface Mount SOIC 14 Single 3 V, 5 V - 8.75 x 4 x 1.5mm 1.5mm
RS Stock No. 669-6449
Mfr. Part No.MCP4651-103E/ST
BrandMicrochip
PHP48.83
Each (In a Pack of 5)
units
Serial-2 Wire, Serial-I2C 10kΩ 256 - Volatile 2 Surface Mount TSSOP 14 Single 2.5 V, 3.3 V, 5 V - 5 x 4.4 x 1mm 1mm
RS Stock No. 517-993
Mfr. Part No.X9118TV14IZ
BrandIntersil
PHP606.13
Each
units
Serial-2 Wire 100kΩ 1024 Linear Non-Volatile 1 Surface Mount TSSOP 14 Dual - ±5V 5.05 x 4.5 x 1.05mm 1.05mm
RS Stock No. 629-3286
Mfr. Part No.AD5227BUJZ10-R2
PHP116.728
Each (In a Pack of 5)
units
Serial-3 Wire 10kΩ 64 - Volatile 1 Surface Mount TSOT 8 Single 3 V, 5 V - 2.9 x 1.6 x 0.87mm 0.87mm
RS Stock No. 403-733
Mfr. Part No.MCP42010-E/SL
BrandMicrochip
PHP123.706
Each (In a Pack of 5)
units
Serial-SPI 10kΩ 256 Linear - 2 Surface Mount SOIC 14 Single 3.3 V, 5 V - 8.65 x 3.9 x 1.25mm 1.25mm
RS Stock No. 111-2252
Mfr. Part No.AD5160BRJZ100-R2
PHP92.93
Each (On a Reel of 250)
units
Serial-3 Wire, Serial-SPI 100kΩ 256 Linear Volatile 1 Surface Mount SOT-23 8 Single 3 V, 5 V - 2.9 x 1.6 x 1.15mm 1.15mm
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