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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ON Semiconductor |
IC POT DPP QUAD 64TAP I2C 24SOIC
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Package: 24-SOIC (0.295", 7.50mm Width) |
In Stock436 |
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Potentiometer | 4 | 64 | 100k | I2C | 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 QUAD 64-TAP 2.5K 24TSSOP
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Package: 24-TSSOP (0.173", 4.40mm Width) |
In Stock151 |
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Potentiometer | 4 | 64 | 2.5k | I2C | Non-Volatile | ��5V | Selectable Address | ±20% | ±300 ppm/°C | 40 | -40°C ~ 85°C | 24-TSSOP (0.173", 4.40mm Width) | 24-TSSOP | |
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Analog Devices Inc. |
IC POT DIG SGLE 50K 8BIT 8SOIC
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Package: 8-SOIC (0.154", 3.90mm Width) |
In Stock436 |
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Potentiometer | 1 | 256 | 50k | SPI | Volatile | 2.7 V ~ 5.5 V | - | ±30% | 500 ppm/°C | 200 | -40°C ~ 125°C | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | |
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Intersil |
IC DCP DUAL 50K 256TP 24SOIC
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Package: 24-SOIC (0.295", 7.50mm Width) |
In Stock411 |
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Potentiometer | 2 | 256 | 50k | SPI | Non-Volatile | 5V | - | ±20% | ±300 ppm/°C | 100 | 0°C ~ 70°C | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC | |
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Intersil |
IC DCP QUAD 50K 256TP 24SOIC
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Package: 24-SOIC (0.295", 7.50mm Width) |
In Stock853 |
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Potentiometer | 4 | 256 | 50k | SPI | Non-Volatile | 2.7 V ~ 5.5 V | Selectable Address | ±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 DCP QUAD 50K 256TP 24SOIC
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Package: 24-SOIC (0.295", 7.50mm Width) |
In Stock421 |
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Potentiometer | 4 | 256 | 50k | SPI | 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 POT DGTL 128TP LN LP 20-TSSOP
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Package: 20-TSSOP (0.173", 4.40mm Width) |
In Stock339 |
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Potentiometer | 4 | 128 | 50k | I2C | Non-Volatile | 2.7 V ~ 5.5 V | Selectable Address | ±20% | ±80 ppm/°C | 70 | -40°C ~ 125°C | 20-TSSOP (0.173", 4.40mm Width) | 20-TSSOP | |
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Intersil |
IC POT DGTL 50K OHM 8-TSSOP
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Package: 8-TSSOP (0.173", 4.40mm Width) |
In Stock4,900 |
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Potentiometer | 1 | 100 | 50k | Up/Down (U/D, INC, CS) | Non-Volatile | 5V | - | ±20% | ±300 ppm/°C | 200 | 0°C ~ 70°C | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP | |
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Maxim Integrated |
IC RES TEMP 50/50K W/3MON 16-BGA
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Package: 16-LBGA, CSPBGA |
In Stock136 |
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Rheostat | 2 | 256 | 50k | I2C | Non-Volatile | 2.85 V ~ 5.5 V | Selectable Address, Temperature Sensor | ±20% | 50 ppm/°C | - | -40°C ~ 95°C | 16-LBGA, CSPBGA | 16-CSBGA (4x4) | |
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Intersil |
IC XDCP SGL 32-TAP 10K 8-SOIC
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Package: 8-SOIC (0.154", 3.90mm Width) |
In Stock478 |
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Potentiometer | 1 | 32 | 10k | Up/Down (U/D, INC, CS) | Non-Volatile | 3 V ~ 5.5 V | - | ±20% | ±600 ppm/°C | 40 | 0°C ~ 70°C | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | |
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Intersil |
IC DGTL POT 2CH 100K 16UTQFN
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Package: 16-UFQFN |
In Stock393 |
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Potentiometer | 2 | 128 | 100k | SPI | Volatile | 1.2 V ~ 5.5 V, 1.7 V ~ 5.5 V | - | ±20% | 45 ppm/°C | 70 | -40°C ~ 125°C | 16-UFQFN | 16-UTQFN (2.6x1.8) | |
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Microchip Technology |
IC DGTL POT 50K 2CH 14SOIC
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Package: 14-SOIC (0.154", 3.90mm Width) |
In Stock404 |
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Potentiometer | 2 | 129 | 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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Analog Devices Inc. |
IC DGTL POT 100K LP TSOT23-8
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Package: SOT-23-8 Thin, TSOT-23-8 |
In Stock348 |
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Potentiometer | 1 | 256 | 100k | SPI | Volatile | 2.7 V ~ 5.5 V | - | ±20% | 35 ppm/°C | 160 | -40°C ~ 125°C | SOT-23-8 Thin, TSOT-23-8 | TSOT-23-8 | |
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Renesas Electronics America |
IC DCP QUAD 10K 64TP 24TSSOP
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Package: 24-TSSOP (0.173", 4.40mm Width) |
In Stock326 |
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Potentiometer | 4 | 64 | 10k | SPI | 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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Renesas Electronics America |
IC DIGITAL POT 1K 32TP 8SOIC
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Package: 8-SOIC (0.154", 3.90mm Width) |
In Stock5,010 |
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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 SGL 100TAP 10K 8-SOIC
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Package: 8-SOIC (0.154", 3.90mm Width) |
In Stock410 |
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Potentiometer | 1 | 100 | 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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Renesas Electronics America |
IC POT DGTL PB 16TP LN LP 8-SOIC
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Package: 8-SOIC (0.154", 3.90mm Width) |
In Stock370 |
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Potentiometer | 1 | 16 | 10k | Pushbutton | Non-Volatile | 2.7 V ~ 5.5 V | - | ±20% | ±80 ppm/°C | 130 | -40°C ~ 125°C | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | |
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Renesas Electronics America |
IC DGTL POT 1CH 50K 10MSOP
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Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
In Stock105 |
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Potentiometer | 1 | 128 | 50k | I²C | Volatile | 1.2 V ~ 5.5 V, 1.7 V ~ 5.5 V | Selectable Address | ±20% | 85 ppm/°C | 70 | -40°C ~ 125°C | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | 10-MSOP | |
|
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 Stock180 |
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Potentiometer | 1 | 64 | 2.5k | I²C | Non-Volatile | 2.7 V ~ 5.5 V | Selectable Address | ±20% | ±300 ppm/°C | 400 | -40°C ~ 85°C | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC | |
|
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Renesas Electronics America |
IC XDCP SGL 64-TAP 10K 16-SOIC
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Package: 16-SOIC (0.295", 7.50mm Width) |
In Stock232 |
|
Potentiometer | 1 | 64 | 10k | I²C | Non-Volatile | 5V | Selectable Address | ±20% | ±300 ppm/°C | 150 | 0°C ~ 70°C | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC | |
|
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Renesas Electronics America |
IC XDCP SGL 64-TAP 10K 16-SOIC
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Package: 16-SOIC (0.295", 7.50mm Width) |
In Stock482 |
|
Potentiometer | 1 | 64 | 10k | I²C | Non-Volatile | 2.7 V ~ 5.5 V | Selectable Address | ±20% | ±300 ppm/°C | 400 | -40°C ~ 85°C | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC | |
|
|
Renesas Electronics America |
IC XDCP SGL 64-TAP 10K 16-SOIC
|
Package: 16-SOIC (0.295", 7.50mm Width) |
In Stock294 |
|
Potentiometer | 1 | 64 | 10k | I²C | Non-Volatile | 5V | 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 SGL 64-TAP 2K 14-TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock499 |
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Potentiometer | 1 | 64 | 2.5k | I²C | Non-Volatile | ±5V | Selectable Address | ±20% | ±300 ppm/°C | 40 | -40°C ~ 85°C | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | |
|
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Renesas Electronics America |
IC XDCP SGL 64-TAP 2K 14-TSSOP
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Package: 14-TSSOP (0.173", 4.40mm Width) |
In Stock395 |
|
Potentiometer | 1 | 64 | 2.5k | I²C | Non-Volatile | ±2.7 V ~ 5.5 V | Selectable Address | ±20% | ±300 ppm/°C | 150 | 0°C ~ 70°C | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | |
|
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Renesas Electronics America |
IC XDCP SGL 100TAP 1K 8-SOIC
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Package: 8-SOIC (0.154", 3.90mm Width) |
In Stock470 |
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Potentiometer | 1 | 100 | 1k | 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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Renesas Electronics America |
IC XDCP DUAL 256TAP 50K 24-TSSOP
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Package: 24-TSSOP (0.173", 4.40mm Width) |
In Stock277 |
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Potentiometer | 2 | 256 | 50k | SPI | Non-Volatile | 2.7 V ~ 5.5 V | Selectable Address | ±20% | ±300 ppm/°C | 300 (Max) | -40°C ~ 85°C | 24-TSSOP (0.173", 4.40mm Width) | 24-TSSOP | |
|
Renesas Electronics America |
IC XDCP QUAD 4X10K EE 20-TSSOP
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Package: 20-TSSOP (0.173", 4.40mm Width) |
In Stock5,000 |
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Potentiometer | 4 | 64 | 10k | I²C | Non-Volatile | 5V | Selectable Address | ±20% | ±300 ppm/°C | 40 | -40°C ~ 85°C | 20-TSSOP (0.173", 4.40mm Width) | 20-TSSOP | |
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Renesas Electronics America |
IC XDCP QUAD 2/10/10/50K 20-S
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Package: 20-SOIC (0.295", 7.50mm Width) |
In Stock391 |
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Potentiometer | 4 | 64 | 2k, 10k, 10k, 50k | I²C | Non-Volatile | 5V | Selectable Address | ±20% | ±300 ppm/°C | 40 | -40°C ~ 85°C | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC | |
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Renesas Electronics America |
IC XDCP DUAL 50K 2-WIRE 20-DIP
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Package: 20-DIP (0.300", 7.62mm) |
In Stock413 |
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Potentiometer | 2 | 64 | 50k | I²C | Non-Volatile | 5V | Selectable Address | ±20% | ±300 ppm/°C | 40 | -40°C ~ 85°C | 20-DIP (0.300", 7.62mm) | 20-PDIP | |
|
ON Semiconductor |
IC DGTL POT 10KOHM 32TAP SOT23-5
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Package: SC-74A, SOT-753 |
In Stock334 |
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- | 1 | 32 | 10k | - | Volatile | 2.7V ~ 5.5V | - | - | 30ppm/°C | - | -40°C ~ 85°C | SC-74A, SOT-753 | SOT-23-5 |
