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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Intersil |
IC DGTL POT DUAL 50K 16UTQFN
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Package: 16-UFQFN |
In Stock231 |
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Potentiometer | 2 | 256 | 50k | I2C | Volatile | 1.2 V ~ 5.5 V, 1.7 V ~ 5.5 V | Selectable Address | ±20% | 65 ppm/°C | 70 | -40°C ~ 125°C | 16-UFQFN | 16-UTQFN (2.6x1.8) | |
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Intersil |
IC XDCP DUAL 64TAP 10K 24-TSSOP
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Package: 24-TSSOP (0.173", 4.40mm Width) |
In Stock252 |
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Potentiometer | 2 | 64 | 10k | I2C | Non-Volatile | ��5V | Selectable Address | ±20% | ±300 ppm/°C | 40 | 0°C ~ 70°C | 24-TSSOP (0.173", 4.40mm Width) | 24-TSSOP | |
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Intersil |
IC POT DGTL 256TP LN LP 10-MSOP
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Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
In Stock440 |
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Potentiometer | 1 | 256 | 100k | SPI | Non-Volatile | ��2.25 V ~ 5.5 V | - | ±20% | 50 ppm/°C | 70 | -40°C ~ 125°C | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | 10-MSOP | |
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Intersil |
IC XDCP DUAL 256TAP 50K 24-SOIC
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Package: 24-SOIC (0.295", 7.50mm Width) |
In Stock187 |
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Potentiometer | 2 | 256 | 50k | SPI | Non-Volatile | 2.7 V ~ 5.5 V | - | ±20% | ±300 ppm/°C | 300 (Max) | 0°C ~ 70°C | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC | |
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Intersil |
IC POT XDCP QUAD LN LP 20-TSSOP
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Package: 20-TSSOP (0.173", 4.40mm Width) |
In Stock412 |
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Potentiometer | 4 | 256 | 50k | I2C | Volatile | 2.7 V ~ 5.5 V | Selectable Address | ±20% | ±45 ppm/°C | 70 | -40°C ~ 105°C | 20-TSSOP (0.173", 4.40mm Width) | 20-TSSOP | |
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Intersil |
IC XDCP DUAL 256TAP 50K 14-TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock311 |
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Potentiometer | 2 | 256 | 50k | I2C | Non-Volatile | 2.7 V ~ 5.5 V | Selectable Address | ±20% | ±45 ppm/°C | 70 | -40°C ~ 85°C | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | |
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Intersil |
IC XDCP SGL 64-TAP 10K 14-TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock277 |
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Potentiometer | 1 | 64 | 10k | I2C | Non-Volatile | 5V | Selectable Address | ±20% | ±300 ppm/°C | 150 | -40°C ~ 85°C | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | |
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Intersil |
IC XDCP QUAD 256TAP 50K 24-DIP
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Package: - |
In Stock336 |
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Potentiometer | 4 | 256 | 50k | SPI | Non-Volatile | 5V | Selectable Address | ±20% | ±300 ppm/°C | 220 (Max) | -40°C ~ 85°C | - | - | |
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Maxim Integrated |
IC RHEOSTAT DALLAST 3V 10K 8SOIC
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Package: 8-SOIC (0.209", 5.30mm Width) |
In Stock419 |
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Potentiometer | 1 | 64 | 10k | Pushbutton, Serial | Non-Volatile | ��2.7 V ~ 8 V | - | ±20% | 750 ppm/°C | 400 | -40°C ~ 85°C | 8-SOIC (0.209", 5.30mm Width) | 8-SOIC | |
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Intersil |
IC DGTL POT QUAD 50K 24SOIC
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Package: 24-SOIC (0.295", 7.50mm Width) |
In Stock1,169 |
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Potentiometer | 4 | 256 | 50k | I2C | Non-Volatile | ��5V | Selectable Address | ±20% | ±300 ppm/°C | 40 | -40°C ~ 85°C | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC | |
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Intersil |
IC XDCP 32-TAP 10K 3WIRE 8-SOIC
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Package: 8-SOIC (0.154", 3.90mm Width) |
In Stock258 |
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Potentiometer | 1 | 32 | 10k | Up/Down (U/D, INC, CS) | Non-Volatile | 2.7 V ~ 5.5 V | - | ±20% | ±300 ppm/°C | 400 | 0°C ~ 70°C | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | |
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Intersil |
IC XDCP 128-TAP 50KOHM 10-MSOP
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Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
In Stock397 |
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Potentiometer | 1 | 128 | 50k | Up/Down (U/D, INC, CS) | Non-Volatile | 2.7 V ~ 5.5 V | - | ±20% | ±45 ppm/°C | 70 | -40°C ~ 85°C | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | 10-MSOP | |
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Microchip Technology |
IC POT DGTL SNGL 50K RHEO 8MSOP
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Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
In Stock122 |
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Rheostat | 1 | 257 | 50k | SPI | Non-Volatile | 1.8 V ~ 5.5 V | - | ±20% | 150 ppm/°C | 75 | -40°C ~ 125°C | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | |
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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 Stock119 |
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Rheostat | 2 | 257 | 10k | SPI | 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 | |
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Microchip Technology |
IC POT DGTL SNGL 5K RHEO 8MSOP
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Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
In Stock289 |
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Rheostat | 1 | 257 | 5k | SPI | Volatile | 1.8 V ~ 5.5 V | - | ±20% | 150 ppm/°C | 75 | -40°C ~ 125°C | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | |
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Microchip Technology |
IC POT DGTL SNGL 5K SPI 8MSOP
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Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
In Stock127 |
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Potentiometer | 1 | 129 | 5k | SPI | Non-Volatile | 1.8 V ~ 5.5 V | - | ±20% | 150 ppm/°C | 75 | -40°C ~ 125°C | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | |
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Microchip Technology |
IC DGTL SNGL 50K SPI 8DFN
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Package: 8-VDFN Exposed Pad |
In Stock203 |
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Rheostat | 1 | 129 | 50k | SPI | Non-Volatile | 1.8 V ~ 5.5 V | - | ±20% | 150 ppm/°C | 75 | -40°C ~ 125°C | 8-VDFN Exposed Pad | 8-DFN-EP (3x3) | |
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Microchip Technology |
IC DGTL POT 10K 1CH 8SOIC
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Package: 8-SOIC (0.154", 3.90mm Width) |
In Stock279 |
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Potentiometer | 1 | 64 | 10k | Up/Down (U/D, CS) | Non-Volatile | 2.7 V ~ 5.5 V | - | ±20% | 150 ppm/°C | 70 | -40°C ~ 125°C | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | |
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Microchip Technology |
IC DGTL POT 10K 2CH 14SOIC
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Package: 14-SOIC (0.154", 3.90mm Width) |
In Stock671 |
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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 | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC | |
|
Analog Devices Inc. |
IC POT DGTL DUAL 1024POS 16TSSOP
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Package: 16-TSSOP (0.173", 4.40mm Width) |
In Stock295 |
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Potentiometer | 2 | 1024 | 25k | SPI | Non-Volatile | 2.7 V ~ 5 V, ��2.25 V ~ 2.75 V | Cascade Pin | ±8% | 35 ppm/°C | 50 | -40°C ~ 85°C | 16-TSSOP (0.173", 4.40mm Width) | 16-TSSOP | |
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Maxim Integrated |
IC POT DGTL 32-TAP NV I2C 8-TDFN
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Package: 8-WDFN Exposed Pad |
In Stock161 |
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Potentiometer | 1 | 32 | 50k | I2C | Non-Volatile | 2.7 V ~ 5.25 V | Selectable Address | ±25% | 35 ppm/°C | 610 | -40°C ~ 85°C | 8-WDFN Exposed Pad | 8-TDFN-EP (3x3) | |
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Renesas Electronics America |
IC XDCP QUAD 256TP 100K 24TSSOP
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Package: 24-TSSOP (0.173", 4.40mm Width) |
In Stock344 |
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Potentiometer | 4 | 256 | 100k | I²C | Non-Volatile | ±2.7 V ~ 5.5 V | Selectable Address | ±20% | ±300 ppm/°C | 150 | -40°C ~ 85°C | 24-TSSOP (0.173", 4.40mm Width) | 24-TSSOP | |
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Renesas Electronics America |
IC XDCP SGL 256TAP 50K 14-TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock449 |
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Potentiometer | 1 | 256 | 50k | SPI | 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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Renesas Electronics America |
IC XDCP 32-TAP 50K 3WIRE 8-MSOP
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Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
In Stock357 |
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Potentiometer | 1 | 32 | 50k | Up/Down (U/D, INC, CS) | Non-Volatile | 5V | - | ±20% | ±300 ppm/°C | 200 | -40°C ~ 85°C | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | |
|
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Renesas Electronics America |
IC XDCP 32-TAP 10K 3-WIRE 8-MSOP
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Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
In Stock115 |
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Potentiometer | 1 | 32 | 10k | Up/Down (U/D, INC, CS) | Non-Volatile | 5V | - | ±20% | ±300 ppm/°C | 40 | 0°C ~ 70°C | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | |
|
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Renesas Electronics America |
IC DGTL POT 2CH 50K 14TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock305 |
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Potentiometer | 2 | 128 | 50k | SPI | Volatile | 1.2 V ~ 5.5 V, 1.7 V ~ 5.5 V | - | ±20% | 65 ppm/°C | 70 | -40°C ~ 125°C | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | |
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Renesas Electronics America |
IC XDCP SGL 64-TAP 2.5K 16-SOIC
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Package: 16-SOIC (0.295", 7.50mm Width) |
In Stock203 |
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Potentiometer | 1 | 64 | 2.5k | SPI | Non-Volatile | ±2.7 V ~ 5.5 V | Selectable Address | ±20% | ±300 ppm/°C | 150 | -40°C ~ 85°C | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC | |
|
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Renesas Electronics America |
IC XDCP 100TAP 100K 3WIRE 8-SOIC
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Package: 8-SOIC (0.154", 3.90mm Width) |
In Stock154 |
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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 | 400 | -40°C ~ 85°C | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | |
|
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Renesas Electronics America |
IC XDCP 100TAP 100K 3WIRE 8-MSOP
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Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
In Stock206 |
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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 | 400 | 0°C ~ 70°C | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | |
|
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Renesas Electronics America |
IC XDCP SGL 1024TAP 100K 14TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock353 |
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Potentiometer | 1 | 1024 | 100k | I²C | Non-Volatile | 2.7 V ~ 5.5 V | Selectable Address | ±20% | ±300 ppm/°C | 150 | -40°C ~ 85°C | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP |
