Digital Potentiometers

Digital Potentiometers are three-terminal devices, two fixed end terminals and one wiper terminal which are used to vary resistance.

What is a Digital potentiometer?

A digital potentiometer also known as a digipot, is similar to a standard analogue potentiometer, which is a variable type resistor except the digital potentiometer has an IC (integrated circuit) that can take a signal input rather. 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 vulnerable 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. 806-5317
Mfr. Part No.AD5272BRMZ-100
HK$43.375
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 to 5.5 V ±2.5 → ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 806-5298
Mfr. Part No.AD5175BRMZ-10
HK$38.41
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 to 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 to 5.5 V - 2.9 x 1.6 x 1.3mm 1.3mm
RS Stock No. 709-7111
Mfr. Part No.AD8400ARZ50
HK$29.17
Each
units
Serial-3 Wire, Serial-SPI 50kΩ 256 Linear Volatile 1 Surface Mount SOIC 8 Single 3 V, 5 V - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 709-7115
Mfr. Part No.AD8402ARUZ10
HK$44.16
Each
units
Serial-3 Wire, Serial-SPI 10kΩ 256 Linear Volatile 2 Surface Mount TSSOP 14 Single 3 V, 5 V - 5 x 4.4 x 1mm 1mm
RS Stock No. 709-7130
Mfr. Part No.AD8402ARZ100
HK$44.16
Each
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. 759-0698
Mfr. Part No.AD5165BUJZ100-R7
HK$19.32
Each (On a Tape of 5)
units
Serial-3 Wire 100kΩ 256 Linear Volatile - Surface Mount SOT-23 8 Single 2.7 → 5.5 V - 2.9 x 1.6 x 0.9mm 0.9mm
RS Stock No. 497-1192
Mfr. Part No.AD5262BRUZ20
HK$51.53
Each
units
Serial-2 Wire, Serial-I2C 20kΩ 256 Linear Volatile 2 Surface Mount TSSOP 16 Dual, Single 15 V ±5V 5 x 4.4 x 1.05mm 1.05mm
RS Stock No. 497-2678
Mfr. Part No.AD5241BRZ1M
HK$25.432
Each (In a Pack of 5)
units
Serial-2 Wire, Serial-I2C 1000kΩ 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. 759-0718
Mfr. Part No.AD5245BRJZ100-R2
HK$25.43
Each
units
Serial-3 Wire 100kΩ 256 Linear Volatile - Surface Mount SOT-23 8 Single 2.7 → 5.5 V - 2.9 x 1.6 x 1.3mm 1.3mm
RS Stock No. 709-4734
Mfr. Part No.AD5243BRMZ2.5
HK$24.53
Each
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. 709-5724
Mfr. Part No.AD5206BRZ10
HK$50.67
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. 697-8031
Mfr. Part No.AD5248BRMZ50
HK$25.63
Each (In a Pack of 5)
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. 709-5673
Mfr. Part No.AD5162BRMZ10
HK$24.06
Each
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. 796-8805
Mfr. Part No.AD5142ABRUZ10
HK$38.51
Each (In a Pack of 2)
units
Serial-I2C 10kΩ 256 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. 709-7133
Mfr. Part No.AD8402ARZ50
HK$44.16
Each
units
Serial-3 Wire, Serial-SPI 50kΩ 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. 709-5727
Mfr. Part No.AD5206BRZ100
HK$50.67
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
RS Stock No. 183-2141
Mfr. Part No.AD5271BRMZ-20
HK$24.236
Each (In a Pack of 5)
units
SPI 20kΩ 256 Linear Non-Volatile 1 Surface Mount MSOP 10 Dual, Single 2.7 to 5.5 V ±2.5 to ±2.75V 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 709-4752
Mfr. Part No.AD5282BRUZ20
HK$51.53
Each
units
Serial-3 Wire, Serial-I2C 20kΩ 256 - Volatile 2 Surface Mount TSSOP 16 Dual, Single 15 V ±5V 5 x 4.4 x 1.05mm 1.05mm
RS Stock No. 497-2656
Mfr. Part No.AD5241BRZ10
HK$24.946
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