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. 709-5800
Mfr. Part No.AD5259BRMZ50
MYR10.30
Each
units
Serial-I2C 50kΩ 256 - Non-Volatile 1 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS Stock No. 144-9093
Mfr. Part No.MCP41010-E/P
BrandMicrochip
MYR6.632
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
MYR6.812
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. 144-5722
Mfr. Part No.MCP41100-E/P
BrandMicrochip
MYR6.632
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. 403-654
Mfr. Part No.MCP41100-E/P
BrandMicrochip
MYR6.766
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. 523-7386
Mfr. Part No.AD8403ARZ10
MYR30.61
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. 703-7936
Mfr. Part No.MCP4361-103E/ST
BrandMicrochip
MYR7.89
Each
units
Serial-SPI 10kΩ 257 Linear Non-Volatile 1 Surface Mount TSSOP 20 Single 2.7 → 5.5 V - 6.6 x 4.5 x 1.05mm 1.05mm
RS Stock No. 146-0162
Mfr. Part No.MCP4362-503E/ST
BrandMicrochip
MYR6.795
Each (In a Tube of 96)
units
Serial-SPI 50kΩ 257 Linear Non-Volatile 4 Surface Mount TSSOP 14 Single 1.8 to 5.5 V - 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 146-0134
Mfr. Part No.MCP42010-I/P
BrandMicrochip
MYR9.077
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. 412-804
Mfr. Part No.AD8402ARZ10
MYR22.52
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. 538-4842
Mfr. Part No.AD5254BRUZ10
MYR23.28
Each
units
Serial-2 Wire, Serial-I2C 10kΩ 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. 709-5777
Mfr. Part No.AD5252BRUZ1
MYR17.18
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. 817-3550
Mfr. Part No.MCP4361T-103E/ST
BrandMicrochip
MYR6.817
Each (On a Reel of 2500)
units
Serial-SPI 10kΩ 257 - Non-Volatile 4 Surface Mount TSSOP 20 Single 5.5 V - 6.6 x 4.5 x 1.05mm 1.05mm
RS Stock No. 806-5339
Mfr. Part No.AD5292BRUZ-50
MYR25.10
Each (In a Pack of 2)
units
Serial-SPI 50kΩ 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. 145-8958
Mfr. Part No.MCP4661-103E/ST
BrandMicrochip
MYR4.58
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. 806-5327
Mfr. Part No.AD5291BRUZ-20
MYR23.03
Each (In a Pack of 2)
units
Serial-SPI 20kΩ 256 - 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. 723-9741
Mfr. Part No.MCP4261-502E/P
BrandMicrochip
MYR5.07
Each (In a Pack of 2)
units
Serial-SPI 5kΩ 257 Linear Non-Volatile 2 Through Hole PDIP 14 Single 1.8 to 5.5 V - 0.4 x 0.28 x 0.195in 4.95mm
RS Stock No. 669-6442
Mfr. Part No.MCP4661-103E/ST
BrandMicrochip
MYR5.28
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. 538-4858
Mfr. Part No.AD5254BRUZ100
MYR24.50
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. 669-6367
Mfr. Part No.MCP42010-I/P
BrandMicrochip
MYR9.77
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