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. 159-7405
Mfr. Part No.MCP4151-103E/P
BrandMicrochip
SGD1.049
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. 912-7255
Mfr. Part No.AD5290YRMZ10
SGD6.321
Each (In a Tube of 50)
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. 412-703
Mfr. Part No.AD5290YRMZ10
SGD7.68
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. 723-9930
Mfr. Part No.MCP4151-103E/P
BrandMicrochip
SGD1.335
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. 829-0548
Mfr. Part No.MCP45HV51-103E/ST
BrandMicrochip
SGD2.116
Each (In a Pack of 5)
units
Serial-I2C 10kΩ 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. 165-4164
Mfr. Part No.MCP45HV51-103E/ST
BrandMicrochip
SGD1.764
Each (In a Tube of 96)
units
Serial-I2C 10kΩ 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. 799-0240
Mfr. Part No.MCP41HV51-103E/ST
BrandMicrochip
SGD2.118
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
SGD9.56
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
SGD1.764
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. 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. 497-2656
Mfr. Part No.AD5241BRZ10
SGD4.04
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. 161-0608
Mfr. Part No.AD5241BRZ10
SGD3.26
Each (In a Tube of 56)
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. 913-0775
Mfr. Part No.AD5252BRUZ1
SGD4.63
Each (In a Tube of 96)
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. 165-3376
Mfr. Part No.MCP4013T-103E/CH
BrandMicrochip
SGD0.547
Each (On a Reel of 3000)
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. 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. 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. 709-5777
Mfr. Part No.AD5252BRUZ1
SGD5.90
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. 145-6776
Mfr. Part No.AD5206BRZ100
SGD6.713
Each (In a Tube of 31)
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. 160-3302
Mfr. Part No.AD5228BUJZ10-RL7
SGD0.885
Each (On a Reel of 3000)
units
Up/Down 100kΩ 32 Linear - 1 Surface Mount TSOT 8 Single 2.7 → 5.5 V - 2.9 x 1.6 x 0.9mm 0.9mm
RS Stock No. 709-5727
Mfr. Part No.AD5206BRZ100
SGD7.91
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