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. 412-703
Mfr. Part No.AD5290YRMZ10
SGD7.07
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. 159-7405
Mfr. Part No.MCP4151-103E/P
BrandMicrochip
SGD1.097
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
SGD1.40
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. 165-4164
Mfr. Part No.MCP45HV51-103E/ST
BrandMicrochip
SGD1.843
Each (In a Tube of 96)
units
Serial-I2C 10kΩ 256 Linear Volatile 1 Surface Mount TSSOP 14 Single 1.8 to 5.5 (Digital) V, 10 to 36 (Analogue) V - 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 829-0548
Mfr. Part No.MCP45HV51-103E/ST
BrandMicrochip
SGD2.21
Each (In a Pack of 5)
units
Serial-I2C 10kΩ 256 Linear Volatile 1 Surface Mount TSSOP 14 Single 1.8 to 5.5 (Digital) V, 10 to 36 (Analogue) V - 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 799-0240
Mfr. Part No.MCP41HV51-103E/ST
BrandMicrochip
SGD2.23
Each (In a Pack of 4)
units
Serial-SPI 10kΩ 256 - Volatile 1 Surface Mount TSSOP 14 Dual, Single 36 V ±18V 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 759-0724
Mfr. Part No.AD5292BRUZ-20
SGD9.99
Each
units
Serial-SPI 20kΩ 1024 Linear Non-Volatile - Surface Mount TSSOP 14 Dual, Single 9 → 33 V ±9 → ±16.5V 5.1 x 4.5 x 1.2mm 1.2mm
RS Stock No. 165-2112
Mfr. Part No.MCP41HV51-103E/ST
BrandMicrochip
SGD1.86
Each (In a Tube of 96)
units
Serial-SPI 10kΩ 256 - Volatile 1 Surface Mount TSSOP 14 Dual, Single 36 V ±18V 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 709-5777
Mfr. Part No.AD5252BRUZ1
SGD5.43
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. 497-2656
Mfr. Part No.AD5241BRZ10
SGD4.14
Each (In a Pack of 5)
units
Serial-2 Wire, Serial-I2C 10kΩ 256 - Volatile 1 Surface Mount SOIC 14 Dual, Single 3 V, 5 V ±2.5V 8.75 x 4 x 1.5mm 1.5mm
RS Stock No. 165-3376
Mfr. Part No.MCP4013T-103E/CH
BrandMicrochip
SGD0.571
Each (On a Reel of 3000)
units
Serial-2 Wire 10kΩ 64 Linear Volatile 1 Surface Mount SOT-23 6 Single 1.8 to 5.5 V - 3.1 x 1.75 x 1.3mm 1.3mm
RS Stock No. 159-6634
Mfr. Part No.MCP4561-103E/MS
BrandMicrochip
SGD1.019
Each (In a Tube of 100)
units
Serial-2 Wire, Serial-I2C 10kΩ 256 - Non-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. 687-8449
Mfr. Part No.MCP4561-103E/MS
BrandMicrochip
SGD1.45
Each
units
Serial-2 Wire, Serial-I2C 10kΩ 256 - Non-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. 738-6749
Mfr. Part No.MCP4013T-103E/CH
BrandMicrochip
SGD0.818
Each (In a Pack of 5)
units
Serial-2 Wire 10kΩ 64 Linear Volatile 1 Surface Mount SOT-23 6 Single 1.8 → 5.5 V - 3.1 x 1.75 x 1.3mm 1.3mm
RS Stock No. 497-1489
Mfr. Part No.AD5231BRUZ100
SGD7.10
Each
units
Serial-2 Wire, Serial-I2C 100kΩ 1024 Linear, Log Non-Volatile 1 Surface Mount TSSOP 16 Dual, Single 3 V, 5 V ±2.5V 5 x 4.4 x 1.05mm 1.05mm
RS Stock No. 669-6367
Mfr. Part No.MCP42010-I/P
BrandMicrochip
SGD3.315
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. 709-5727
Mfr. Part No.AD5206BRZ100
SGD7.28
Each
units
Serial-3 Wire, Serial-SPI 100kΩ 256 - Volatile 6 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. 160-4479
Mfr. Part No.AD5171BRJZ100-R2
SGD3.36
Each (On a Reel of 250)
units
I2C, Serial-2 Wire 100kΩ 64 Linear Non-Volatile 1 Surface Mount SOT-23 8 Single 2.7 to 5.5 V - 2.9 x 1.6 x 1.3mm 1.3mm
RS Stock No. 723-9968
Mfr. Part No.MCP4161-103E/P
BrandMicrochip
SGD1.55
Each (In a Pack of 2)
units
Serial-SPI 10kΩ 257 Linear Non-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. 819-7086
Mfr. Part No.AD5171BRJZ100-R2
SGD4.68
Each (In a Pack of 5)
units
I2C, Serial-2 Wire 100kΩ 64 Linear Non-Volatile 1 Surface Mount SOT-23 8 Single 2.7 to 5.5 V - 2.9 x 1.6 x 1.3mm 1.3mm
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