Digital Potentiometers

Digital Potentiometers are three-terminal devices, two fixed end terminals and one wiper terminal which are used to vary resistance.

What is a Digital potentiometer?

A digital potentiometer also known as a digipot, is similar to a standard analogue potentiometer, which is a variable type resistor except the digital potentiometer has an IC (integrated circuit) that can take a signal input rather. 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 vulnerable 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. 403-654
Mfr. Part No.MCP41100-E/P
BrandMicrochip
€1.44
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
€1.099
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. 523-6838
Mfr. Part No.AD5220BNZ100
€3.02
Each
units
Serial-3 Wire 100kΩ 128 - Volatile 1 Through Hole PDIP 8 Single 3 V, 5 V - 9.27 x 7.24 x 3.43mm 3.43mm
RS Stock No. 403-579
Mfr. Part No.MCP42100-E/P
BrandMicrochip
€2.148
Each (In a Pack of 5)
units
Serial-SPI 100kΩ 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. 518-368
Mfr. Part No.X9111TV14IZ
BrandIntersil
€10.18
Each
units
Serial-SPI 100kΩ 1024 Linear Non-Volatile 1 Surface Mount TSSOP 14 Single 5 V - 5.05 x 4.5 x 1.05mm 1.05mm
RS Stock No. 169-8294
Mfr. Part No.X9111TV14IZ
BrandIntersil
€7.662
Each (In a Tube of 95)
units
Serial-SPI 100kΩ 1024 Linear Non-Volatile 1 Surface Mount TSSOP 14 Single 5 V - 5.05 x 4.5 x 1.05mm 1.05mm
RS Stock No. 165-4730
Mfr. Part No.MCP42100-E/P
BrandMicrochip
€1.643
Each (In a Tube of 30)
units
Serial-SPI 100kΩ 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. 697-6874
Mfr. Part No.AD5258BRMZ10
€1.498
Each (In a Pack of 5)
units
Serial-I2C 10kΩ 64 - Non-Volatile 1 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS Stock No. 523-6816
Mfr. Part No.AD5220BNZ10
€2.87
Each
units
Serial-3 Wire 10kΩ 128 - Volatile 1 Through Hole PDIP 8 Single 3 V, 5 V - 9.27 x 7.24 x 3.43mm 3.43mm
RS Stock No. 723-9930
Mfr. Part No.MCP4151-103E/P
BrandMicrochip
€0.835
Each (In a Pack of 2)
units
Serial-SPI 10kΩ 257 Linear Volatile 1 Through Hole PDIP 8 Single 1.8 to 5.5 V - 0.4 x 0.28 x 0.195in 4.95mm
RS Stock No. 758-9594
Mfr. Part No.AD5220BRMZ100
€2.54
Each
units
Serial-3 Wire 100kΩ 128 Linear Volatile - Surface Mount MSOP 8 Single 2.7 to 5.5 V - 3.2 x 3.2 x 1.1mm 1.1mm
RS Stock No. 806-5317
Mfr. Part No.AD5272BRMZ-100
€3.665
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 to 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 709-5777
Mfr. Part No.AD5252BRUZ1
€3.64
Each
units
Serial-3 Wire, Serial-I2C 1kΩ 256 Linear Non-Volatile 2 Surface Mount TSSOP 14 Dual, Single 3 V, 5 V ±2.5V 5 x 4.4 x 1mm 1mm
RS Stock No. 412-703
Mfr. Part No.AD5290YRMZ10
€4.73
Each
units
Serial-3 Wire, Serial-SPI 10kΩ 256 - Volatile 1 Surface Mount MSOP 10 Dual, Single 15 V ±12 V, ±5 V, ±9 V 3 x 3 x 0.85mm 0.85mm
RS Stock No. 806-5301
Mfr. Part No.AD5270BRMZ-50
€3.665
Each (In a Pack of 2)
units
Serial-SPI 50kΩ 1024 - Non-Volatile 1 Surface Mount MSOP 10 Dual, Single 2.7 to 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 159-7405
Mfr. Part No.MCP4151-103E/P
BrandMicrochip
€0.635
Each (In a Tube of 60)
units
Serial-SPI 10kΩ 257 Linear Volatile 1 Through Hole PDIP 8 Single 1.8 to 5.5 V - 0.4 x 0.28 x 0.195in 4.95mm
RS Stock No. 191-3920
Mfr. Part No.DS3903E-020+
€1.284
Each (In a Tube of 74)
units
- 110kΩ 128 Linear Non-Volatile 3 Surface Mount TSSOP 20 Single 5.5 V - 6.6 x 0.177 x 0.037mm 0.04mm
RS Stock No. 196-9010
Mfr. Part No.X9511WSIZ
€4.325
Each (In a Pack of 2)
units
- - 32 - - - - - 8 - - - - -
RS Stock No. 165-3383
Mfr. Part No.MCP4018T-104E/LT
BrandMicrochip
€0.33
Each (On a Reel of 3000)
units
Serial-I2C 100kΩ 128 Linear Volatile 1 Surface Mount SC-70 6 Single 1.8 to 5.5 V - 2 x 1.25 x 1mm 1mm
RS Stock No. 160-2735
Mfr. Part No.AD5111BCPZ80-500R7
€1.024
Each (On a Reel of 500)
units
Up/Down 80kΩ 128 Linear Non-Volatile 1 Surface Mount LFCSP 8 Single 5.5 V - 2 x 2 x 0.6mm 0.6mm