Intersil has introduced its first low-voltage digitally controlled potentiometer (DCP) with less than 1% typical resistor tolerance.

The ISL22317 is targetted at designs that require specific current and resistor values such as test and measurement circuits, medical devices, backlight controls, or adjusting specific resistances in analogue circuits.

The patent-pending architecture of the ISL22317 allows it to track an external resistor within 10ppm/deg C, improving overall system accuracy for temperatures up to 125 deg C. 

The device enables designers to select accurate pre-determined resistor values, and use calculated resistor values in schematics. In addition, it allows one to use the known value of one system to calibrate other systems. 

It also features a zero-compensated wiper resistance in rheostat mode. By negating wiper resistance, overall accuracy is improved, especially at the low tap positions where the ratio of wiper resistance to actual resistance is much higher.

This enables users to do schematic calculations based on an actual 1 percent value, instead of competitive solutions that have greater than ±20% tolerance of the resistor string in addition to wiper resistance error.

The ISL22317 is available in 3x3mm TDFN Package – 0.75mm max thickness, 0.65mm pitch. Versions with 10kohm, 50kohm and 100kohm are available.