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
HK$10.564
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
HK$13.658
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. 889-5878
Mfr. Part No.MCP41010-I/SN
BrandMicrochip
HK$10.135
Each (In a Tube of 100)
units
Serial-SPI 10kΩ 256 Linear - 1 Surface Mount SOIC 8 Single 3.3 V, 5 V - 4.9 x 3.9 x 1.25mm 1.25mm
RS Stock No. 669-6367
Mfr. Part No.MCP42010-I/P
BrandMicrochip
HK$17.32
Each (In a Pack of 2)
units
Serial-SPI 10kΩ 256 Linear - 2 Through Hole PDIP 14 Single 3.3 V, 5 V - 19.05 x 6.35 x 3.3mm 3.3mm
RS Stock No. 146-0134
Mfr. Part No.MCP42010-I/P
BrandMicrochip
HK$14.469
Each (In a Tube of 30)
units
Serial-SPI 10kΩ 256 Linear - 2 Through Hole PDIP 14 Single 3.3 V, 5 V - 19.05 x 6.35 x 3.3mm 3.3mm
RS Stock No. 628-3762
Mfr. Part No.MCP41010-I/SN
BrandMicrochip
HK$11.628
Each (In a Pack of 5)
units
Serial-SPI 10kΩ 256 Linear - 1 Surface Mount SOIC 8 Single 3.3 V, 5 V - 4.9 x 3.9 x 1.25mm 1.25mm
RS Stock No. 806-5298
Mfr. Part No.AD5175BRMZ-10
HK$33.165
Each (In a Pack of 2)
units
Serial-3 Wire, Serial-I2C 10kΩ 1024 - Non-Volatile 1 Surface Mount MSOP 10 Dual, Single 2.7 → 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 144-5722
Mfr. Part No.MCP41100-E/P
BrandMicrochip
HK$10.564
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. 160-4482
Mfr. Part No.AD5171BRJZ5-R2
HK$19.60
Each (On a Reel of 250)
units
I2C, Serial-2 Wire 5kΩ 64 Linear Non-Volatile 1 Surface Mount SOT-23 8 Single 2.7 → 5.5 V - 2.9 x 1.6 x 1.3mm 1.3mm
RS Stock No. 806-5317
Mfr. Part No.AD5272BRMZ-100
HK$37.48
Each (In a Pack of 2)
units
Serial-3 Wire, Serial-I2C 100kΩ 1024 - Non-Volatile 1 Surface Mount MSOP 10 Dual, Single 2.7 → 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 403-743
Mfr. Part No.MCP41100-E/SN
BrandMicrochip
HK$13.26
Each (In a Pack of 5)
units
Serial-SPI 100kΩ 256 Linear - 1 Surface Mount SOIC 8 Single 3.3 V, 5 V - 4.9 x 3.9 x 1.25mm 1.25mm
RS Stock No. 403-654
Mfr. Part No.MCP41100-E/P
BrandMicrochip
HK$12.598
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. 921-5352
Mfr. Part No.X9313WSZ
HK$35.34
Each (In a Pack of 2)
units
Serial-3 Wire 10kΩ 32 Linear Non-Volatile 1 Surface Mount SOIC 8 Single 5 V - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 160-1639
Mfr. Part No.AD5175BRMZ-10
HK$29.613
Each (In a Tube of 50)
units
Serial-3 Wire, Serial-I2C 10kΩ 1024 - Non-Volatile 1 Surface Mount MSOP 10 Dual, Single 2.7 → 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 912-2770
Mfr. Part No.MCP41100-E/SN
BrandMicrochip
HK$11.021
Each (In a Tube of 100)
units
Serial-SPI 100kΩ 256 Linear - 1 Surface Mount SOIC 8 Single 3.3 V, 5 V - 4.9 x 3.9 x 1.25mm 1.25mm
RS Stock No. 160-1643
Mfr. Part No.AD5272BRMZ-100
HK$33.403
Each (In a Tube of 50)
units
Serial-3 Wire, Serial-I2C 100kΩ 1024 - Non-Volatile 1 Surface Mount MSOP 10 Dual, Single 2.7 → 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 517-993
Mfr. Part No.X9118TV14IZ
BrandIntersil
HK$91.73
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. 145-8958
Mfr. Part No.MCP4661-103E/ST
BrandMicrochip
HK$8.98
Each (In a Tube of 96)
units
Serial-2 Wire, Serial-I2C 10kΩ 256 - 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. 160-9911
Mfr. Part No.AD5141BCPZ100-RL7
HK$12.729
Each (On a Reel of 1500)
units
Serial-I2C, Serial-SPI 100kΩ 256 Log Non-Volatile 1 Surface Mount LFCSP 16 Dual, Single 2.3 → 5.5 V ±2.25 → ±2.75V 3.1 x 3.1 x 0.75mm 0.75mm
RS Stock No. 190-4770
Mfr. Part No.DS3904U-020+
HK$11.546
Each (In a Tube of 50)
units
- 20kΩ 128 Linear Non-Volatile 3 Surface Mount μSOP 8 Single 2.7 → 5.5 V - 3.1 x 3.1 x 0.95mm 0.95mm
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