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. 709-5828
Mfr. Part No.AD5290YRMZ50
kr 51,42
Each
Units
Serial-3 Wire, Serial-SPI 50kΩ 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. 159-7405
Mfr. Part No.MCP4151-103E/P
BrandMicrochip
kr 6,903
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. 723-9930
Mfr. Part No.MCP4151-103E/P
BrandMicrochip
kr 10,11
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. 412-692
Mfr. Part No.AD8400ARZ1
kr 30,092
Each (In a Pack of 5)
Units
Serial-3 Wire, Serial-SPI 1kΩ 256 Linear Volatile 1 Surface Mount SOIC 8 Single 3 V, 5 V - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 538-4757
Mfr. Part No.AD5252BRUZ100
kr 36,42
Each
Units
Serial-2 Wire, Serial-I2C 100kΩ 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. 403-579
Mfr. Part No.MCP42100-E/P
BrandMicrochip
kr 26,222
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. 165-4730
Mfr. Part No.MCP42100-E/P
BrandMicrochip
kr 19,67
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. 709-5755
Mfr. Part No.AD5242BRZ100
kr 34,35
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. 100-0181
Mfr. Part No.X95840WV20IZ-2.7
BrandIntersil
kr 70,77
Each
Units
Serial-I2C 10kΩ 256 - Non-Volatile 3 Surface Mount TSSOP 20 Single 2.7 to 5.5 V - 6.5 x 4.4 x 0.9mm 0.9mm
RS Stock No. 412-703
Mfr. Part No.AD5290YRMZ10
kr 51,42
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. 669-6363
Mfr. Part No.MCP41050-I/SN
BrandMicrochip
kr 14,372
Each (In a Pack of 5)
Units
Serial-SPI 50kΩ 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. 709-5783
Mfr. Part No.AD5254BRUZ1
kr 57,51
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. 921-5368
Mfr. Part No.X9C103PZ
kr 62,89
Each (In a Pack of 2)
Units
Serial-3 Wire 10kΩ 100 Linear Non-Volatile 1 Through Hole PDIP 8 Single 5 V - 9.56 x 6.35 x 3.3mm 3.3mm
RS Stock No. 724-0047
Mfr. Part No.MCP4362-503E/ST
BrandMicrochip
kr 19,68
Each
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. 170-8170
Mfr. Part No.X9C103SZ
kr 46,112
Each (In a Tube of 100)
Units
Serial-3 Wire 10kΩ 100 Linear Non-Volatile 1 Surface Mount SOIC 8 Single 5 V - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 759-0724
Mfr. Part No.AD5292BRUZ-20
kr 64,03
Each
Units
Serial-SPI 20kΩ 1024 Linear Non-Volatile - Surface Mount TSSOP 14 Dual, Single 9 to 33 V ±9 → ±16.5V 5.1 x 4.5 x 1.2mm 1.2mm
RS Stock No. 709-5771
Mfr. Part No.AD5252BRUZ50
kr 36,42
Each
Units
Serial-3 Wire, Serial-I2C 50kΩ 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. 170-8096
Mfr. Part No.X95840WV20IZ-2.7
BrandIntersil
kr 60,905
Each (In a Tube of 75)
Units
Serial-I2C 10kΩ 256 - Non-Volatile 3 Surface Mount TSSOP 20 Single 2.7 to 5.5 V - 6.5 x 4.4 x 0.9mm 0.9mm
RS Stock No. 921-5349
Mfr. Part No.X9C103SZ
kr 62,89
Each (In a Pack of 2)
Units
Serial-3 Wire 10kΩ 100 Linear Non-Volatile 1 Surface Mount SOIC 8 Single 5 V - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 170-8172
Mfr. Part No.X9C103PZ
kr 53,198
Each (In a Tube of 50)
Units
Serial-3 Wire 10kΩ 100 Linear Non-Volatile 1 Through Hole PDIP 8 Single 5 V - 9.56 x 6.35 x 3.3mm 3.3mm