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. 160-1639
Mfr. Part No.AD5175BRMZ-10
HK$25.50
Each (In a Tube of 50)
units
Serial-3 Wire, Serial-I2C 10kΩ 1024 - Non-Volatile 1 Surface Mount MSOP 10 Dual, Single 2.7 → 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 806-5317
Mfr. Part No.AD5272BRMZ-100
HK$37.57
Each (In a Pack of 2)
units
Serial-3 Wire, Serial-I2C 100kΩ 1024 - Non-Volatile 1 Surface Mount MSOP 10 Dual, Single 2.7 → 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 819-7095
Mfr. Part No.AD5171BRJZ5-R2
HK$29.61
Each (In a Pack of 5)
units
I2C, Serial-2 Wire 5kΩ 64 Linear Non-Volatile 1 Surface Mount SOT-23 8 Single 2.7 → 5.5 V - 2.9 x 1.6 x 1.3mm 1.3mm
RS Stock No. 160-1643
Mfr. Part No.AD5272BRMZ-100
HK$28.75
Each (In a Tube of 50)
units
Serial-3 Wire, Serial-I2C 100kΩ 1024 - Non-Volatile 1 Surface Mount MSOP 10 Dual, Single 2.7 → 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 160-4482
Mfr. Part No.AD5171BRJZ5-R2
HK$19.60
Each (On a Reel of 250)
units
I2C, Serial-2 Wire 5kΩ 64 Linear Non-Volatile 1 Surface Mount SOT-23 8 Single 2.7 → 5.5 V - 2.9 x 1.6 x 1.3mm 1.3mm
RS Stock No. 806-5298
Mfr. Part No.AD5175BRMZ-10
HK$33.29
Each (In a Pack of 2)
units
Serial-3 Wire, Serial-I2C 10kΩ 1024 - Non-Volatile 1 Surface Mount MSOP 10 Dual, Single 2.7 → 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 629-3286
Mfr. Part No.AD5227BUJZ10-R2
HK$17.16
Each (In a Pack of 5)
units
Serial-3 Wire 10kΩ 64 - Volatile 1 Surface Mount TSOT 8 Single 3 V, 5 V - 2.9 x 1.6 x 0.87mm 0.87mm
RS Stock No. 820-9218
Mfr. Part No.AD5170BRMZ100
HK$27.662
Each (In a Pack of 5)
units
Serial-3 Wire, Serial-I2C 100kΩ 256 Linear Non-Volatile 1 Surface Mount MSOP 10 Single 2.7 → 5.5 V - 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 183-1992
Mfr. Part No.AD5207BRUZ100
HK$23.53
Each (In a Pack of 5)
units
Serial-3 Wire 100kΩ 256 Linear Non-Volatile 1 Surface Mount TSSOP 14 Dual, Single 2.7 → 5.5 V ±2.2 to ±2.7V 5.1 x 4.5 x 0.95mm 0.95mm
RS Stock No. 145-5814
Mfr. Part No.AD5173BRMZ2.5
HK$26.61
Each (In a Tube of 50)
units
Serial-3 Wire, Serial-I2C 2.5kΩ 256 - Volatile 2 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS Stock No. 145-1094
Mfr. Part No.AD5162BRMZ10
HK$17.03
Each (In a Tube of 50)
units
Serial-3 Wire, Serial-SPI 10kΩ 256 Linear Volatile 2 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS Stock No. 161-0609
Mfr. Part No.AD5241BRZ100
HK$18.48
Each (In a Tube of 56)
units
Serial-2 Wire, Serial-I2C 100kΩ 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. 538-6028
Mfr. Part No.AD5263BRUZ50
HK$60.16
Each
units
Serial-2 Wire, Serial-3 Wire, Serial-I2C, Serial-SPI 50kΩ 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. 806-5336
Mfr. Part No.AD5292BRUZ-100
HK$55.28
Each (In a Pack of 2)
units
Serial-SPI 100kΩ 1024 - Non-Volatile 1 Surface Mount TSSOP 14 Dual, Single 9 → 33 V ±9 → ±16.5V 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 697-7287
Mfr. Part No.AD8403ARUZ10
HK$60.67
Each
units
Serial-3 Wire, Serial-SPI 10kΩ 256 Linear Volatile 4 Surface Mount TSSOP 24 Single 3 V, 5 V - 7.8 x 4.4 x 1.05mm 1.05mm
RS Stock No. 806-5301
Mfr. Part No.AD5270BRMZ-50
HK$37.57
Each (In a Pack of 2)
units
Serial-SPI 50kΩ 1024 - Non-Volatile 1 Surface Mount MSOP 10 Dual, Single 2.7 → 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 796-8795
Mfr. Part No.AD5122BRUZ10
HK$31.32
Each (In a Pack of 2)
units
Serial-SPI 10kΩ 128 Linear Non-Volatile 2 Surface Mount TSSOP 16 Dual, Single 2.3 → 5.5 V ±2.25 → ±2.75V 5.1 x 4.5 x 1.05mm 1.05mm
RS Stock No. 161-0610
Mfr. Part No.AD5242BRUZ10
HK$21.65
Each (In a Tube of 96)
units
Serial-2 Wire, Serial-I2C 10kΩ 256 - Volatile 2 Surface Mount TSSOP 16 Dual, Single 3 V, 5 V ±2.5V 5 x 4.4 x 1.05mm 1.05mm
RS Stock No. 912-7255
Mfr. Part No.AD5290YRMZ10
HK$34.23
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. 158-0155
Mfr. Part No.AD5252BRUZ100
HK$30.456
Each (In a Tube of 96)
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