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. 809-9780
Mfr. Part No.AD5206BN10
R 59.93
Each
units
Serial-3 Wire 10kΩ 256 Linear Non-Volatile 1 Through Hole PDIP 24 Dual, Single 2.7 → 5.5 V - 32.51 x 7.11 x 4.95mm 4.95mm
RS stock no. 145-7593
Mfr. Part No.AD5248BRMZ10
R 28.543
Each (In a Tube of 50)
units
Serial-3 Wire 10kΩ 256 Linear Volatile - Surface Mount MSOP 10 Single 2.7 → 5.5 V - 3.1 x 3.1 x 1.1mm 1.1mm
RS stock no. 158-5281
Mfr. Part No.AD5206BRZ10
R 61.597
Each (In a Tube of 31)
units
Serial-3 Wire, Serial-SPI 10kΩ 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. 759-0711
Mfr. Part No.AD5248BRMZ10
R 37.08
Each
units
Serial-3 Wire 10kΩ 256 Linear Volatile - Surface Mount MSOP 10 Single 2.7 → 5.5 V - 3.1 x 3.1 x 1.1mm 1.1mm
RS stock no. 709-5724
Mfr. Part No.AD5206BRZ10
R 107.35
Each
units
Serial-3 Wire, Serial-SPI 10kΩ 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. 709-4743
Mfr. Part No.AD5243BRMZ50
R 48.57
Each
units
Serial-3 Wire, Serial-I2C 50kΩ 256 - Volatile 2 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS stock no. 160-4479
Mfr. Part No.AD5171BRJZ100-R2
R 37.469
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 → 5.5 V - 2.9 x 1.6 x 1.3mm 1.3mm
RS stock no. 914-0251
Mfr. Part No.AD5228BUJZ10-RL7
R 19.324
Each (In a Pack of 5)
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. 819-7086
Mfr. Part No.AD5171BRJZ100-R2
R 50.976
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 → 5.5 V - 2.9 x 1.6 x 1.3mm 1.3mm
RS stock no. 912-6564
Mfr. Part No.AD5243BRMZ50
R 28.291
Each (In a Tube of 50)
units
Serial-3 Wire, Serial-I2C 50kΩ 256 - Volatile 2 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS stock no. 160-3302
Mfr. Part No.AD5228BUJZ10-RL7
R 8.456
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. 168-4166
Mfr. Part No.AD5200BRMZ10-REEL7
R 29.33
Each (On a Reel of 1000)
units
Serial-3 Wire, Serial-SPI 10kΩ 256 Linear Volatile 1 Surface Mount SOIC 10 Dual, Single 2.7 → 5.5 V ±2.7V 3.15 x 3.15 x 0.97mm 0.97mm
RS stock no. 412-692
Mfr. Part No.AD8400ARZ1
R 75.876
Each (In a Pack of 5)
units
Serial-3 Wire, Serial-SPI 1kΩ 256 Linear Volatile 1 Surface Mount SOIC 8 Single 3 V, 5 V - 5 x 4 x 1.5mm 1.5mm
RS stock no. 875-8678
Mfr. Part No.AD5165BUJZ100-R2
R 41.462
Each (In a Pack of 5)
units
3-Wire Digital Interface 100kΩ 256 Linear - 1 Surface Mount SOT-23 8 Single 5.5 V - 2.9 x 1.6 x 0.9mm 0.9mm
RS stock no. 709-7143
Mfr. Part No.AD8403ARZ50
R 64.37
Each
units
Serial-3 Wire, Serial-SPI 50kΩ 256 Linear Volatile 4 Surface Mount SOIC W 24 Single 3 V, 5 V - 15.6 x 7.6 x 2.35mm 2.35mm
RS stock no. 758-9594
Mfr. Part No.AD5220BRMZ100
R 54.13
Each
units
Serial-3 Wire 100kΩ 128 Linear Volatile - Surface Mount MSOP 8 Single 2.7 → 5.5 V - 3.2 x 3.2 x 1.1mm 1.1mm
RS stock no. 497-2606
Mfr. Part No.AD5200BRMZ10
R 24.28
Each (In a Pack of 5)
units
Serial-2 Wire, Serial-I2C 10kΩ 256 Linear Volatile 1 Surface Mount MSOP 10 Dual, Single 3 V, 5 V ±2.5V 3 x 3 x 0.85mm 0.85mm
RS stock no. 160-1649
Mfr. Part No.AD5292BRUZ-50
R 72.861
Each (In a Tube of 96)
units
Serial-SPI 50kΩ 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. 912-7246
Mfr. Part No.AD8400ARZ1
R 35.469
Each (In a Tube of 98)
units
Serial-3 Wire, Serial-SPI 1kΩ 256 Linear Volatile 1 Surface Mount SOIC 8 Single 3 V, 5 V - 5 x 4 x 1.5mm 1.5mm
RS stock no. 158-5278
Mfr. Part No.AD5162BRMZ50
R 20.851
Each (In a Tube of 50)
units
Serial-3 Wire, Serial-SPI 50kΩ 256 Linear Volatile 2 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm