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. 165-4730
Mfr. Part No.MCP42100-E/P
BrandMicrochip
£1.48
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. 403-579
Mfr. Part No.MCP42100-E/P
BrandMicrochip
£1.936
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. 806-5336
Mfr. Part No.AD5292BRUZ-100
£4.89
Each (In a Pack of 2)
Units
Serial-SPI 100kΩ 1024 - Non-Volatile 1 Surface Mount TSSOP 14 Dual, Single 9 to 33 V ±9 → ±16.5V 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 669-6367
Mfr. Part No.MCP42010-I/P
BrandMicrochip
£1.78
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. 709-5755
Mfr. Part No.AD5242BRZ100
£2.49
Each
Units
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
RS Stock No. 709-5783
Mfr. Part No.AD5254BRUZ1
£4.77
Each
Units
Serial-3 Wire, Serial-I2C 1kΩ 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. 687-8446
Mfr. Part No.MCP4551-103E/MS
BrandMicrochip
£0.72
Each
Units
Serial-2 Wire, Serial-I2C 10kΩ 256 - Volatile 1 Surface Mount MSOP 8 Single 2.5 V, 3.3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS Stock No. 820-9343
Mfr. Part No.AD5246BKSZ50-RL7
£1.138
Each (In a Pack of 5)
Units
Serial-3 Wire, Serial-I2C 50kΩ 128 - Non-Volatile 1 Surface Mount SC-70 6 Single 2.7 to 5.5 V - 2.2 x 1.35 x 1mm 1mm
RS Stock No. 165-3382
Mfr. Part No.MCP4017T-104E/LT
BrandMicrochip
£0.297
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. 160-7975
Mfr. Part No.AD5246BKSZ50-RL7
£0.522
Each (On a Reel of 3000)
Units
Serial-3 Wire, Serial-I2C 50kΩ 128 - Non-Volatile 1 Surface Mount SC-70 6 Single 2.7 to 5.5 V - 2.2 x 1.35 x 1mm 1mm
RS Stock No. 709-5825
Mfr. Part No.AD5290YRMZ100
£4.26
Each
Units
Serial-3 Wire, Serial-SPI 100kΩ 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. 669-6442
Mfr. Part No.MCP4661-103E/ST
BrandMicrochip
£1.00
Each (In a Pack of 5)
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. 806-5320
Mfr. Part No.AD5272BRMZ-50
£3.30
Each (In a Pack of 2)
Units
Serial-3 Wire, Serial-I2C 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. 145-8958
Mfr. Part No.MCP4661-103E/ST
BrandMicrochip
£0.80
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. 819-7357
Mfr. Part No.AD8402ANZ10
£3.95
Each (In a Pack of 2)
Units
Serial-3 Wire 10kΩ 256 - - 1 Through Hole PDIP 14 Single 2.7 to 5.5 V - 19.69 x 7.11 x 4.95mm 4.95mm
RS Stock No. 889-5156
Mfr. Part No.MCP4551-103E/MS
BrandMicrochip
£0.518
Each (In a Tube of 100)
Units
Serial-2 Wire, Serial-I2C 10kΩ 256 - Volatile 1 Surface Mount MSOP 8 Single 2.5 V, 3.3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS Stock No. 159-6629
Mfr. Part No.MCP4641-103E/ST
BrandMicrochip
£0.671
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. 669-6430
Mfr. Part No.MCP4641-103E/ST
BrandMicrochip
£0.848
Each (In a Pack of 5)
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. 709-5676
Mfr. Part No.AD5162BRMZ2.5
£1.96
Each
Units
Serial-3 Wire, Serial-SPI 2.5kΩ 256 Linear Volatile 2 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS Stock No. 921-5352
Mfr. Part No.X9313WSZ
£3.48
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