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. 738-6109
Mfr. Part No.MCP4011-502E/SN
BrandMicrochip
$0.806
Each (In a Pack of 5)
units
Serial-2 Wire 5kΩ 64 - Volatile - Surface Mount SOIC 8 Single 2.5 V, 3.3 V, 5 V - 4.9 x 3.9 x 1.25mm 1.25mm
RS Stock No. 161-0610
Mfr. Part No.AD5242BRUZ10
$3.87
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. 158-0466
Mfr. Part No.AD5227BUJZ10-R2
$2.25
Each (On a Reel of 250)
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. 921-5848
Mfr. Part No.X9C102PZ
$10.06
Each (In a Pack of 2)
units
Serial-3 Wire 1kΩ 100 Linear Non-Volatile 1 Through Hole PDIP 8 Single 5 V - 9.56 x 6.35 x 3.3mm 3.3mm
RS Stock No. 190-4761
Mfr. Part No.DS1267BS-100+
$7.88
Each (In a Tube of 46)
units
- 100kΩ 256 Linear - 2 Surface Mount SO 16 Single 4.5 → 5.5 V - 10.5 x 7.6 x 2.35mm 2.35mm
RS Stock No. 191-3918
Mfr. Part No.DS1803Z-050+
$6.50
Each (In a Tube of 50)
units
- 50kΩ 256 Linear Volatile 2 Surface Mount SOIC 16 Single 5.5 (Max.) V - 10 x 4 x 1.5mm 1.5mm
RS Stock No. 168-4106
Mfr. Part No.AD8402ARZ100
$5.58
Each (In a Tube of 56)
units
Serial-3 Wire, Serial-SPI 100kΩ 256 Linear Volatile 2 Surface Mount SOIC 14 Single 3 V, 5 V - 8.75 x 4 x 1.5mm 1.5mm
RS Stock No. 190-5381
Mfr. Part No.MAX5484EUD+
$6.75
Each (In a Pack of 5)
units
- 50kΩ 1024 Linear Non-Volatile 1 Surface Mount TSSOP 14 Dual, Single 2.7 → 5.25 V -2.5 → -0.2V 5.1 x 4.5 x 0.95mm 0.95mm
RS Stock No. 165-2112
Mfr. Part No.MCP41HV51-103E/ST
BrandMicrochip
$1.93
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. 709-6360
Mfr. Part No.AD7376ARUZ50
$12.84
Each
units
Serial-3 Wire, Serial-SPI 50kΩ 128 - Volatile 1 Surface Mount TSSOP 14 Dual, Single 30 V ±15V 5 x 4.4 x 1mm 1mm
RS Stock No. 165-2241
Mfr. Part No.MCP4011T-202E/MC
BrandMicrochip
$0.601
Each (On a Reel of 3300)
units
Serial-2 Wire 2.1kΩ 64 - Volatile 1 Surface Mount DFN 8 Single 1.8 → 5.5 V - 3 x 2 x 0.95mm 0.95mm
RS Stock No. 806-5317
Mfr. Part No.AD5272BRMZ-100
$6.71
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. 912-6564
Mfr. Part No.AD5243BRMZ50
$3.04
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. 183-1891
Mfr. Part No.AD5160BRJZ100-RL7
$2.924
Each (In a Pack of 5)
units
SPI 100kΩ 256 Linear - 1 Surface Mount SOT-23 8 Single 2.7 → 5.5 V - 3 x 1.7 x 1.3mm 1.3mm
RS Stock No. 158-5283
Mfr. Part No.AD5220BRZ50
$3.58
Each (In a Tube of 98)
units
Serial-3 Wire 50kΩ 128 - Volatile 1 Surface Mount SOIC 8 Single 3 V, 5 V - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 806-5301
Mfr. Part No.AD5270BRMZ-50
$6.71
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. 759-0711
Mfr. Part No.AD5248BRMZ10
$3.97
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. 183-1969
Mfr. Part No.AD5203ARZ10
$7.875
Each (In a Pack of 2)
units
Serial-3 Wire 10kΩ 64 Linear - 1 Surface Mount SOIC 24 Single 2.7 → 5.5 V - 15.6 x 7.6 x 2.35mm 2.35mm
New
RS Stock No. 196-9009
Mfr. Part No.X9511WSIZ
$6.002
Each (In a Tube of 100)
units
- - 32 - - - - - 8 - - - - -
RS Stock No. 160-2735
Mfr. Part No.AD5111BCPZ80-500R7
$1.87
Each (On a Reel of 500)
units
Up/Down 80kΩ 128 Linear Non-Volatile 1 Surface Mount LFCSP 8 Single 5.5 V - 2 x 2 x 0.6mm 0.6mm
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