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. 821-3021
Mfr. Part No.CAT5114LI-50-G
£1.618
Each (In a Pack of 5)
Units
Up/Down 50kΩ 32 Linear Non-Volatile 1 Through Hole PDIP 8 Single 2.5 to 6 V - 10.16 x 7.11 x 4.95mm 4.95mm
RS Stock No. 709-4721
Mfr. Part No.AD5204BRZ10
£3.34
Each
Units
Serial-3 Wire, Serial-SPI 10kΩ 256 - Volatile 4 Surface Mount SOIC W 24 Dual, Single 3 V, 5 V ±2.5V 15.6 x 7.6 x 2.35mm 2.35mm
RS Stock No. 770-7761
Mfr. Part No.MCP41010-I/P
BrandMicrochip
£1.198
Each (In a Pack of 6)
Units
Serial-SPI 10kΩ 256 Linear Volatile 1 Through Hole PDIP 8 Single 2.7 to 5.5 V - 9.78 x 6.6 x 3.68mm 3.68mm
RS Stock No. 145-8990
Mfr. Part No.MCP4131-503E/P
BrandMicrochip
£0.427
Each (In a Tube of 60)
Units
Serial-SPI 50kΩ 129 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. 709-4756
Mfr. Part No.AD5282BRUZ200
£3.93
Each
Units
Serial-3 Wire, Serial-I2C 200kΩ 256 - Volatile 2 Surface Mount TSSOP 16 Dual, Single 15 V ±5V 5 x 4.4 x 1.05mm 1.05mm
RS Stock No. 823-3567
Mfr. Part No.MCP4241-103E/ST
BrandMicrochip
£0.498
Each (In a Pack of 10)
Units
SPI 10kΩ 129 - Non-Volatile 2 Surface Mount TSSOP 14 Single 2.7 to 5.5 V - 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 146-0243
Mfr. Part No.MCP4241-103E/ST
BrandMicrochip
£0.484
Each (In a Tube of 96)
Units
SPI 10kΩ 129 - Non-Volatile 2 Surface Mount TSSOP 14 Single 2.7 to 5.5 V - 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 709-5749
Mfr. Part No.AD5222BRZ10
£1.308
Each (In a Pack of 5)
Units
Increment/Decrement 10kΩ 128 - Volatile 2 Surface Mount SOIC 14 Dual, Single 3 V, 5 V ±2.5V 8.75 x 4 x 1.5mm 1.5mm
RS Stock No. 709-4715
Mfr. Part No.AD5204BRUZ10
£3.34
Each
Units
Serial-3 Wire, Serial-SPI 10kΩ 256 - Volatile 4 Surface Mount TSSOP 24 Dual, Single 3 V, 5 V ±2.5V 7.8 x 4.4 x 1.05mm 1.05mm
RS Stock No. 738-6972
Mfr. Part No.MCP4131-503E/P
BrandMicrochip
£0.566
Each (In a Pack of 5)
Units
Serial-SPI 50kΩ 129 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. 796-8824
Mfr. Part No.AD5144ABRUZ100
£5.21
Each
Units
Serial-I2C 100kΩ 256 Linear Non-Volatile 4 Surface Mount TSSOP 20 Dual, Single 2.3 to 5.5 V ±2.25 → ±2.75V 6.6 x 4.5 x 1.05mm 1.05mm
RS Stock No. 497-2634
Mfr. Part No.AD5241BRUZ100
£2.138
Each (In a Pack of 5)
Units
Serial-2 Wire, Serial-I2C 100kΩ 256 - Volatile 1 Surface Mount TSSOP 14 Dual, Single 3 V, 5 V ±2.5V 5 x 4.4 x 1mm 1mm
RS Stock No. 709-6364
Mfr. Part No.AD7376ARWZ100
£6.69
Each
Units
Serial-3 Wire, Serial-SPI 100kΩ 128 - Volatile 1 Surface Mount SOIC W 16 Dual, Single 30 V ±15V 10.5 x 7.6 x 2.35mm 2.35mm
RS Stock No. 538-6012
Mfr. Part No.AD5263BRUZ200
£5.31
Each
Units
Serial-2 Wire, Serial-3 Wire, Serial-I2C, Serial-SPI 200kΩ 256 Linear Volatile 4 Surface Mount TSSOP 24 Dual, Single 5 V ±5V 7.8 x 4.4 x 1.05mm 1.05mm
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. 145-8983
Mfr. Part No.MCP4551-503E/MS
BrandMicrochip
£0.518
Each (In a Tube of 100)
Units
Serial-I2C 50kΩ 257 Linear Non-Volatile 1 Surface Mount MSOP 8 Single 1.8 to 5.5 V - 3 x 3 x 0.95mm 0.95mm
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. 709-5783
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. 146-0134
Mfr. Part No.MCP42010-I/P
BrandMicrochip
£1.36
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