A Programmable potentiometer is a component-level controlling device in which the resistance between two externally accessible terminals can be varied as programed by the master/host device.
The Digital potentiometer actually consists of a number of resistive elements connected in a series combination between the two terminals. The taps to these resistive elements are controlled by CMOS switches. These resistive elements are composed of polycrystalline silicon and are insulated from other parts of the circuit through the oxide layer coating. Only one of the CMOS switches is closed at a time leading to a certain resistance between the terminals.
There are special control registers which store the switching instructions for every wiper taps. The number of bits in the control registers depends on the number of resistive elements and the greater the number of resistive elements inside the digital pot, the greater the number of resistance values can be obtained. The CAT5241 programmable digital potentiometer IC, for example, has four independent digital pots on the same chip. Each of these four potentiometers has 63 resistive elements and need a 6-bit control resister to control their tapping.
The control registers can be programmed by a computer through I2C transmission. The wiper settings stored in these control registers are non-volatile, which means that the instructions are not erased from its memory even if the power is turned OFF.
A programmable potentiometer may be used as a three-terminal device or as a two-terminal device. These applications are briefly explained with the help of the following examples:
The digital pot can be used as a potential divider to get a certain voltage output anywhere between the voltages of the two terminals as the wiper voltage. This can be used to make a simple digital to analog converter which can give continuous varying voltage output by connecting the wiper to the input of an op-amp. The digital signal sent by the host device will be converted to an analog signal at the output of the op-amp. The greater the number of resistive elements in the potentiometer, the greater the resolution can be attained for the output signal.
The digital potentiometer can also be used as a programmable resister in circuits where the circuit parameters depend on a certain resistor. For example, we can use the programmable pot to vary the voltage gain in an op-amp by using it as the feedback element. Or we can vary the cutoff frequency of a high-pass or low-pass filter by using it as the biasing resistance.
Data Acquisition - Digital Potentiometers
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Part Number |
Manufacturer |
Description |
Package |
In Stock |
Quantity |
Configuration | Number of Circuits | Number of Taps | Resistance (Ohms) | Interface | Memory Type | Voltage - Supply | Features | Tolerance | Temperature Coefficient (Typ) | Resistance - Wiper (Ohms) (Typ) | Operating Temperature | Package / Case | Supplier Device Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Analog Devices Inc. |
IC DGTL POT DUAL 256POS 14TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock404 |
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Potentiometer | 2 | 256 | 50k | SPI | Volatile | 2.7 V ~ 5.5 V, ±2.2 V ~ 2.7 V | Cascade Pin | ±30% | 500 ppm/°C | 50 | -40°C ~ 125°C | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | |
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ON Semiconductor |
IC POT DPP 50K 64TAP SPI 24SOIC
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Package: 24-SOIC (0.295", 7.50mm Width) |
In Stock270 |
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Potentiometer | 2 | 64 | 50k | SPI | Non-Volatile | 2.5 V ~ 6 V | Selectable Address | ±20% | 300 ppm/°C | 80 | -40°C ~ 85°C | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC | |
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Intersil |
IC XDCP DUAL 64TAP 10K 24-SOIC
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Package: 24-SOIC (0.295", 7.50mm Width) |
In Stock400 |
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Potentiometer | 2 | 64 | 10k | SPI | Non-Volatile | ±5V | Selectable Address | ±20% | ±300 ppm/°C | 40 | 0°C ~ 70°C | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC | |
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Intersil |
IC XDCP DUAL 64TAP 10K 24-SOIC
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Package: 24-SOIC (0.295", 7.50mm Width) |
In Stock420 |
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Potentiometer | 2 | 64 | 10k | I2C | Non-Volatile | ±2.7 V ~ 5.5 V | Selectable Address | ±20% | ±300 ppm/°C | 150 | -40°C ~ 85°C | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC | |
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Intersil |
IC XDCP SGL 100TAP 10K 8-DIP
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Package: 8-DIP (0.300", 7.62mm) |
In Stock265 |
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Potentiometer | 1 | 100 | 10k | Up/Down (U/D, INC, CS) | Non-Volatile | 5V | - | ±20% | ±300 ppm/°C | 200 | -40°C ~ 85°C | 8-DIP (0.300", 7.62mm) | 8-PDIP | |
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Intersil |
IC XDCP SGL 256TAP 50K 14-TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock150 |
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Potentiometer | 1 | 256 | 50k | I2C | Non-Volatile | 5V | Selectable Address | ±20% | ±300 ppm/°C | 150 (Max) | -40°C ~ 85°C | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | |
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Intersil |
IC XDCP SGL 256TAP 100K 14-TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock388 |
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Potentiometer | 1 | 256 | 100k | I2C | Non-Volatile | 2.7 V ~ 5.5 V | Selectable Address | ±20% | ±300 ppm/°C | 300 (Max) | -40°C ~ 85°C | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | |
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Intersil |
IC XDCP 32-TAP 10KOHM SOT23-6
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Package: SOT-23-6 |
In Stock499 |
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Rheostat | 1 | 32 | 10k | Up/Down (U/D, CS) | Volatile | 2.7 V ~ 5.5 V | - | ±20% | ±35 ppm/°C | 600 | -40°C ~ 85°C | SOT-23-6 | SOT-23-6 | |
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Analog Devices Inc. |
IC DCP DUAL 50K 256POS 14TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock127 |
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Potentiometer | 2 | 256 | 50k | I2C | Non-Volatile | 2.7 V ~ 5.5 V, ±2.25 V ~ 2.75 V | Selectable Address | ±20% | 650 ppm/°C | 200 | -40°C ~ 105°C | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | |
 
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Analog Devices Inc. |
IC DGTL POT 256POS 16-TSSOP
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Package: 16-TSSOP (0.173", 4.40mm Width) |
In Stock35,164 |
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Potentiometer | 2 | 256 | 10k | I2C | Volatile | 2.7 V ~ 5.5 V, ±2.3 V ~ 2.7 V | Selectable Address | ±30% | 30 ppm/°C | 60 | -40°C ~ 105°C | 16-TSSOP (0.173", 4.40mm Width) | 16-TSSOP | |
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Nuvoton Technology Corporation of America |
IC POT DGTL 100K 64 TAPS 8-DIP
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Package: 8-DIP (0.300", 7.62mm) |
In Stock243 |
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Potentiometer | 1 | 64 | 100k | Up/Down (U/D, INC, CS) | Non-Volatile | 2.7 V ~ 5.5 V | - | ±20% | 300 ppm/°C | 80 | -40°C ~ 85°C | 8-DIP (0.300", 7.62mm) | 8-PDIP | |
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Nuvoton Technology Corporation of America |
IC POT DGTL 100K 100TAPS 8-DIP
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Package: 8-DIP (0.300", 7.62mm) |
In Stock366 |
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Potentiometer | 1 | 100 | 100k | Up/Down (U/D, INC, CS) | Non-Volatile | 2.7 V ~ 5.5 V | - | ±20% | 300 ppm/°C | 80 | -40°C ~ 85°C | 8-DIP (0.300", 7.62mm) | 8-PDIP | |
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ON Semiconductor |
IC POT DPP NV 100TAP U/D 8MSOP
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Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
In Stock492 |
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Potentiometer | 1 | 100 | 1k | Up/Down (U/D, INC, CS) | Non-Volatile | 2.5 V ~ 6 V | - | ±20% | 300 ppm/°C | 1000 (Max) | -40°C ~ 85°C | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | |
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Microchip Technology |
IC DGTL POT 257TAPS 5K 20QFN
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Package: 20-VFQFN Exposed Pad |
In Stock204 |
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Potentiometer | 4 | 257 | 5k | I2C | Non-Volatile | 1.8 V ~ 5.5 V | Mute, Selectable Address | ±20% | 150 ppm/°C | 75 | -40°C ~ 125°C | 20-VFQFN Exposed Pad | 20-QFN (4x4) | |
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Maxim Integrated |
IC POT DIGIT DL LOG 50K 16SOIC
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Package: 16-SOIC (0.154", 3.90mm Width) |
In Stock417 |
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Potentiometer | 2 | 64 | 45k | I2C | Non-Volatile | 4.5 V ~ 7 V | Mute, Selectable Address, Zero-Cross Sense | ±20% | 750 ppm/°C | 160 | -40°C ~ 85°C | 16-SOIC (0.154", 3.90mm Width) | 16-SO | |
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Microchip Technology |
IC DGTL POT QUAD 10K 20QFN
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Package: 20-VFQFN Exposed Pad |
In Stock486 |
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Potentiometer | 4 | 129 | 10k | SPI | Volatile | 1.8 V ~ 5.5 V | - | ±20% | 150 ppm/°C | 75 | -40°C ~ 125°C | 20-VFQFN Exposed Pad | 20-QFN-EP (4x4) | |
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Microchip Technology |
IC DGTL POT QUAD 10K 20QFN
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Package: 20-VFQFN Exposed Pad |
In Stock135 |
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Potentiometer | 4 | 129 | 10k | SPI | Volatile | 1.8 V ~ 5.5 V | - | ±20% | 150 ppm/°C | 75 | -40°C ~ 125°C | 20-VFQFN Exposed Pad | 20-QFN-EP (4x4) | |
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Microchip Technology |
IC POT DGTL DUAL 10K SPI 16QFN
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Package: 16-VQFN Exposed Pad |
In Stock484 |
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Potentiometer | 2 | 129 | 10k | SPI | Non-Volatile | 1.8 V ~ 5.5 V | - | ±20% | 150 ppm/°C | 75 | -40°C ~ 125°C | 16-VQFN Exposed Pad | 16-QFN-EP (4x4) | |
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Microchip Technology |
IC RHEOSTAT 10K 2CH 10MSOP
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Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
In Stock247 |
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Rheostat | 2 | 129 | 10k | SPI | Non-Volatile | 1.8 V ~ 5.5 V | - | ±20% | 150 ppm/°C | 75 | -40°C ~ 125°C | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | 10-MSOP | |
|
Microchip Technology |
IC DGTL POT 50K 2CH 14SOIC
|
Package: 14-SOIC (0.154", 3.90mm Width) |
In Stock404 |
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Potentiometer | 2 | 257 | 50k | SPI | Volatile | 1.8 V ~ 5.5 V | - | ±20% | 150 ppm/°C | 75 | -40°C ~ 125°C | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC | |
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Maxim Integrated |
IC DGTL POT 50K 2CH 20TSSOP
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Package: 20-TSSOP (0.173", 4.40mm Width) |
In Stock317 |
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Potentiometer | 2 | 256 | 50k | Serial | Volatile | 2.7 V ~ 3.3 V, 5V | - | ±20% | 750 ppm/°C | 900 | -40°C ~ 85°C | 20-TSSOP (0.173", 4.40mm Width) | 20-TSSOP | |
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Maxim Integrated |
IC DGTL POT 10/30K 2CH 16TSSOP
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Package: 16-TSSOP (0.173", 4.40mm Width) |
In Stock582 |
|
Rheostat | 2 | 256 | 30k | I2C | Non-Volatile | 2.85 V ~ 5.5 V | - | ±25% | 50 ppm/°C | - | -40°C ~ 95°C | 16-TSSOP (0.173", 4.40mm Width) | 16-TSSOP | |
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Renesas Electronics America |
IC DCP QUAD 50K 256TP 24SOIC
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Package: 24-SOIC (0.295", 7.50mm Width) |
In Stock429 |
|
Potentiometer | 4 | 256 | 50k | I²C | Non-Volatile | 5V | Selectable Address | ±20% | ±300 ppm/°C | 220 (Max) | 0°C ~ 70°C | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC | |
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Renesas Electronics America |
IC DGTL POT 10K 1CH 14TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock281 |
|
Potentiometer | 1 | 64 | 10k | SPI | Non-Volatile | ±5V | Selectable Address | ±20% | ±300 ppm/°C | 40 | 0°C ~ 70°C | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | |
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Renesas Electronics America |
IC DGTL POT 256POS 100K 20TSSOP
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Package: 20-TSSOP (0.173", 4.40mm Width) |
In Stock454 |
|
Potentiometer | 4 | 256 | 100k | SPI | Volatile | 1.2 V ~ 5.5 V, 1.7 V ~ 5.5 V | - | ±20% | 45 ppm/°C | 70 | -40°C ~ 125°C | 20-TSSOP (0.173", 4.40mm Width) | 20-TSSOP | |
|
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Renesas Electronics America |
IC POT DGTL 128TP LN LP 10-MSOP
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Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
In Stock314 |
|
Potentiometer | 2 | 128 | 50k | SPI | Non-Volatile | 2.7 V ~ 5.5 V | - | ±20% | ±80 ppm/°C | 70 | -40°C ~ 125°C | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | 10-MSOP | |
|
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Renesas Electronics America |
IC XDCP DUAL 64TAP 2.5K 24-SOIC
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Package: 24-SOIC (0.295", 7.50mm Width) |
In Stock365 |
|
Potentiometer | 2 | 64 | 2.5k | SPI | Non-Volatile | ±2.7 V ~ 5.5 V | Selectable Address | ±20% | ±300 ppm/°C | 150 | 0°C ~ 70°C | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC | |
|
Renesas Electronics America |
IC XDCP DUAL 64-TAP 2.5K 24TSSOP
|
Package: 24-TSSOP (0.173", 4.40mm Width) |
In Stock289 |
|
Potentiometer | 2 | 64 | 2.5k | I²C | Non-Volatile | ±5V | Selectable Address | ±20% | ±300 ppm/°C | 40 | 0°C ~ 70°C | 24-TSSOP (0.173", 4.40mm Width) | 24-TSSOP | |
|
Renesas Electronics America |
IC XDCP 32-TAP 1K 3-WIRE 8-SOIC
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Package: 8-SOIC (0.154", 3.90mm Width) |
In Stock415 |
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Potentiometer | 1 | 32 | 1k | Up/Down (U/D, INC, CS) | Non-Volatile | 5V | - | ±20% | ±300 ppm/°C | 40 | 0°C ~ 70°C | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | |
|
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Renesas Electronics America |
IC XDCP 32-TAP 100KOHM SOT23-6
|
Package: SOT-23-6 |
In Stock201 |
|
Rheostat | 1 | 32 | 100k | Up/Down (U/D, CS) | Volatile | 2.7 V ~ 5.5 V | - | ±20% | ±35 ppm/°C | 600 | -40°C ~ 85°C | SOT-23-6 | SOT-23-6 |
