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Digital potentiometers operate up to 125 degrees C

Milpitas, Calif. — Intersil Corp. has introduced two new families of 128-tap, non-volatile single, dual, and quad digitally-controlled potentiometers (DCPs). These DCPs with SPI and I2C interfaces deliver precision measurement and a wide operating temperature range for applications designed to function from -40°C to +125°C.

The new families are comprised of 24 cost-effective devices suitable for calibrating system tolerances, controlling system parameters and for AC measurement or signal processing. These DCPs can tune or adjust values in portable or large systems, or can adjust brightness on LED and LCD displays.

All DCP families feature a combination of resistor elements and CMOS switches, and each operates with a voltage range from 2.7 V to 5.5 V. Wiper position is controlled by the user through either an SPI serial interface or I2C interface. The devices can be used in any application that requires an adjustment within the voltage range of 0 V to 5 V.

The DCPs are said to feature an excellent temperature coefficient, providing highly precise measurements and reducing resistance drifts in applications that experience temperature fluctuations. The devices are designed to operate over the full industrial temperature range, making them suitable for industrial designs, automotive designs, medical instrumentation and many consumer electronics applications.

The ISL223X6 (I2C) and ISL224X6 (SPI) include single, dual and quad versions integrated with non-volatile memory. They are designed for use either as voltage dividers or as variable resistors since they can be used as 3-terminal potentiometers or as 2-terminal variable resistors. Terminal voltages can be adjusted to any value between GND and VDD.

The ISL22316 and ISL22416 integrate a single DCP and non-volatile memory in a monolithic CMOS integrated circuit. The ISL22326 and ISL22426 dual versions integrate two DCPs with memory, while the quad ISL22346 and ISL22446 versions incorporate four DCPs with memory.

The ISL223X9 and ISL224X9 also include single, dual and quad versions. In all of these devices, the VH is connected to VDD and the VL is connected to GND, providing a voltage divider solution in a small package that requires only a minimal number of external components. The single versions are the ISL22319 and ISL22419 with one DCP and non-volatile memory. The dual versions are the ISL22329 and ISL22429 with two DCPs and non-volatile memory. The quad versions include the ISL22349 and ISL22449, with four DCPs and non-volatile memory.

Pricing: The single ISL22316 and ISL22416 devices are available now in 10-lead MSOP packaging with prices starting at $0.97 each. The dual ISL22326 and ISL22426 devices are available now in 14-lead TSSOP packaging with prices starting at $1.55 each, and the quad ISL22346 and ISL22446 parts are available in 20-lead TSSOP packaging and priced at $2.64 each. The single ISL22319 and ISL22419 are available now in 8-lead MSOP packaging with prices starting at $0.95. The dual ISL22329 and ISL22429 are available in 10-lead MSOP packaging and priced at $1.49 each and the quad ISL22349 and ISL22449 are available in 14-lead TSSOP packaging and priced at $2.57 each. All pricing is in 1,000-unit quantities.

Product family information: digitally-controlled potentiometers
Product information by part numbers:

Intersil Corp. , 1-408-432-888, www.intersil.com

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