Digital Potentiometers

What is a Digital potentiometer?
Digital Potentiometers are a three terminal device, two fixed end terminals and one wiper terminal which is used to vary the resistance.
A Digital potentiometer also known as digipot, is similar to a standard analogue potentiometer, which is a variable resistor except the digital potentiometer has an integrated chip (IC) that accepts a signal input rather than the physical movement of a shaft or slide for adjustment. 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 vunerable 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. 723-9930
Mfr. Part No.MCP4151-103E/P
BrandMicrochip
$1.725
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. 159-7405
Mfr. Part No.MCP4151-103E/P
BrandMicrochip
$1.111
Each (In a Tube of 60)
units
Serial-SPI 10kΩ 257 Linear Volatile 1 Through Hole PDIP 8 Single 1.8 → 5.5 V - 0.4 x 0.28 x 0.195in 4.95mm
RS Stock No. 144-9093
Mfr. Part No.MCP41010-E/P
BrandMicrochip
$1.723
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. 829-0545
Mfr. Part No.MCP45HV51-502E/ST
BrandMicrochip
$2.224
Each (In a Pack of 5)
units
Serial-I2C 5kΩ 256 Linear Volatile 1 Surface Mount TSSOP 14 Single 1.8 → 5.5 (Digital) V, 10 → 36 (Analogue) V - 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 403-676
Mfr. Part No.MCP41010-E/P
BrandMicrochip
$2.562
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. 165-4163
Mfr. Part No.MCP45HV51-502E/ST
BrandMicrochip
$2.115
Each (In a Tube of 96)
units
Serial-I2C 5kΩ 256 Linear Volatile 1 Surface Mount TSSOP 14 Single 1.8 → 5.5 (Digital) V, 10 → 36 (Analogue) V - 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 770-7761
Mfr. Part No.MCP41010-I/P
BrandMicrochip
$2.018
Each (In a Pack of 6)
units
Serial-SPI 10kΩ 256 Linear Volatile 1 Through Hole PDIP 8 Single 2.7 → 5.5 V - 9.78 x 6.6 x 3.68mm 3.68mm
RS Stock No. 145-9002
Mfr. Part No.MCP41010-I/P
BrandMicrochip
$1.61
Each (In a Tube of 60)
units
Serial-SPI 10kΩ 256 Linear Volatile 1 Through Hole PDIP 8 Single 2.7 → 5.5 V - 9.78 x 6.6 x 3.68mm 3.68mm
RS Stock No. 723-9968
Mfr. Part No.MCP4161-103E/P
BrandMicrochip
$1.845
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. 165-3467
Mfr. Part No.MCP4161-103E/P
BrandMicrochip
$1.367
Each (In a Tube of 60)
units
Serial-SPI 10kΩ 257 Linear Non-Volatile 1 Through Hole PDIP 8 Single 1.8 → 5.5 V - 0.4 x 0.28 x 0.195in 4.95mm
RS Stock No. 159-6628
Mfr. Part No.MCP42050-I/P
BrandMicrochip
$2.404
Each (In a Tube of 30)
units
Serial-SPI 50kΩ 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. 669-6376
Mfr. Part No.MCP42050-I/P
BrandMicrochip
$3.535
Each (In a Pack of 2)
units
Serial-SPI 50kΩ 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. 799-0256
Mfr. Part No.MCP41HV51-503E/ST
BrandMicrochip
$1.99
Each (In a Pack of 4)
units
Serial-SPI 50kΩ 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. 165-2115
Mfr. Part No.MCP41HV51-503E/ST
BrandMicrochip
$2.115
Each (In a Tube of 96)
units
Serial-SPI 50kΩ 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. 144-5722
Mfr. Part No.MCP41100-E/P
BrandMicrochip
$1.723
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
$2.45
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. 628-3762
Mfr. Part No.MCP41010-I/SN
BrandMicrochip
$1.98
Each (In a Pack of 5)
units
Serial-SPI 10kΩ 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. 724-0154
Mfr. Part No.MCP4161-502E/SN
BrandMicrochip
$1.405
Each (In a Pack of 2)
units
Serial-SPI 5kΩ 257 Linear Non-Volatile 1 Surface Mount SOIC 8 Single 1.8 → 5.5 V - 4.9 x 3.9 x 1.25mm 1.25mm
RS Stock No. 889-5878
Mfr. Part No.MCP41010-I/SN
BrandMicrochip
$1.373
Each (In a Tube of 100)
units
Serial-SPI 10kΩ 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. 146-0134
Mfr. Part No.MCP42010-I/P
BrandMicrochip
$2.404
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