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庫存編號 145-6195
製造零件編號AD5161BRMZ50
TWD42
毎管:50 個
單位
Serial-2 Wire, Serial-3 Wire, Serial-I2C, Serial-SPI 50kΩ 256 - Volatile 1 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS庫存編號 709-5664
製造零件編號AD5161BRMZ50
TWD58
/個 (每包:5個)
單位
Serial-2 Wire, Serial-3 Wire, Serial-I2C, Serial-SPI 50kΩ 256 - Volatile 1 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS庫存編號 160-9980
製造零件編號AD8400ARZ10
TWD78
毎管:98 個
單位
Serial-3 Wire, Serial-SPI 10kΩ 256 Linear Volatile 1 Surface Mount SOIC 8 Single 3 V, 5 V - 5 x 4 x 1.5mm 1.5mm
RS庫存編號 799-0247
製造零件編號MCP41HV31-503E/ST
BrandMicrochip
TWD43
/個 (每包:4個)
單位
Serial-SPI 50kΩ 128 - Volatile 1 Surface Mount TSSOP 14 Dual, Single 36 V ±18V 5.1 x 4.5 x 1.05mm 1.05mm
RS庫存編號 165-2114
製造零件編號MCP41HV31-503E/ST
BrandMicrochip
TWD41
毎管:96 個
單位
Serial-SPI 50kΩ 128 - Volatile 1 Surface Mount TSSOP 14 Dual, Single 36 V ±18V 5.1 x 4.5 x 1.05mm 1.05mm
RS庫存編號 160-1646
製造零件編號AD5291BRUZ-20
TWD147
毎管:96 個
單位
Serial-SPI 20kΩ 256 - 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庫存編號 806-5327
製造零件編號AD5291BRUZ-20
TWD191
/個 (每包:2個)
單位
Serial-SPI 20kΩ 256 - 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庫存編號 230-703
製造零件編號AD8400ARZ10
TWD98
/個 (每包:5個)
單位
Serial-3 Wire, Serial-SPI 10kΩ 256 Linear Volatile 1 Surface Mount SOIC 8 Single 3 V, 5 V - 5 x 4 x 1.5mm 1.5mm
RS庫存編號 161-0582
製造零件編號AD5262BRUZ20
TWD129
毎管:96 個
單位
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庫存編號 709-5759
製造零件編號AD5248BRMZ100
TWD85
單位
Serial-3 Wire, Serial-I2C 100kΩ 256 - Volatile 2 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm
RS庫存編號 786-1192
製造零件編號MAX5478EUD+
BrandMaxim
TWD92
/個 (每包:2個)
單位
Serial-I2C 50kΩ 256 Linear Non-Volatile 1 Surface Mount TSSOP 14 Dual 2.7 → 5.25 V - 5.1 x 4.5 x 0.95mm 0.95mm
RS庫存編號 165-9476
製造零件編號MAX5478EUD+
BrandMaxim
TWD80
毎管:96 個
單位
Serial-I2C 50kΩ 256 Linear Non-Volatile 1 Surface Mount TSSOP 14 Dual 2.7 → 5.25 V - 5.1 x 4.5 x 0.95mm 0.95mm
RS庫存編號 160-1639
製造零件編號AD5175BRMZ-10
TWD96
毎管:50 個
單位
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庫存編號 165-3384
製造零件編號MCP4019T-104E/LT
BrandMicrochip
TWD14
個 (在毎卷:3000)
單位
Serial-I2C 100kΩ 128 Linear Volatile 1 Surface Mount SC-70 5 Single 1.8 → 5.5 V - 2.25 x 1.35 x 1mm 1mm
RS庫存編號 168-4167
製造零件編號AD5262BRUZ20-RL7
TWD128
個 (在毎卷:1000)
單位
Serial-3 Wire, Serial-SPI 20kΩ 256 Linear Volatile - Surface Mount TSSOP 16 Dual, Single 4.5 → 16.5 V ±4.5 → ±5.5V 5.1 x 4.5 x 1.2mm 1.2mm
RS庫存編號 889-5878
製造零件編號MCP41010-I/SN
BrandMicrochip
TWD35
毎管:100 個
單位
Serial-SPI 10kΩ 256 Linear - 1 Surface Mount SOIC 8 Single 3.3 V, 5 V - 4.9 x 3.9 x 1.25mm 1.25mm
RS庫存編號 145-8983
製造零件編號MCP4551-503E/MS
BrandMicrochip
TWD24
毎管:100 個
單位
Serial-I2C 50kΩ 257 Linear Non-Volatile 1 Surface Mount MSOP 8 Single 1.8 → 5.5 V - 3 x 3 x 0.95mm 0.95mm
RS庫存編號 911-5592
製造零件編號MCP4641T-502E/ML
BrandMicrochip
TWD28
個 (在毎卷:3300)
單位
Serial-I2C 5kΩ 129 - Non-Volatile 2 Surface Mount QFN 16 Single 2.7 → 5.5 V - 4 x 4 x 0.95mm 0.95mm
RS庫存編號 759-0715
製造零件編號AD5262BRUZ20-RL7
TWD141
單位
Serial-3 Wire, Serial-SPI 20kΩ 256 Linear Volatile - Surface Mount TSSOP 16 Dual, Single 4.5 → 16.5 V ±4.5 → ±5.5V 5.1 x 4.5 x 1.2mm 1.2mm
RS庫存編號 168-4105
製造零件編號AD5259BRMZ50
TWD64
毎管:50 個
單位
Serial-I2C 50kΩ 256 - Non-Volatile 1 Surface Mount MSOP 10 Single 3 V, 5 V - 3 x 3 x 0.85mm 0.85mm