Intersil has introduced the first low-voltage digitally controlled potentiometer (DCP) with < 1 percent typical resistor tolerance, the ISL22317. The ultra-low tolerance allows the ISL22317 to be used as a true variable resistor, enabling users to set standard and non-standard resistor values for open-loop applications.
The ISL22317 is an excellent choice for designs that require specific current and resistor values such as test and measurement circuits, medical devices, backlight controls, or adjusting specific resistances in analog circuits. The patent-pending architecture of the ISL22317 allows it to track an external resistor within 10ppm/°C, improving overall system accuracy for temperatures up to 125°C.
The device reduces programming time and development costs by letting users 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. The device employs an easy-to-use I2C interface to program accurate resistor settings >1 million times in the integrated EEPROM memory. 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 >±20 percent tolerance of the resistor string in addition to wiper resistance error.
The ISL22317 is available in 3mmx3mm TDFN Package 0.75mm max thickness, 0.65mm pitch. Versions with 10kOhms, 50kOhms, and 100kOhms are available; 1,000-unit pricing is $1.80.
For more information, please visit: http://www.intersil.com/products/deviceinfo.asp?pn=ISL22317
Intersil SA, Sandringham House, 110 Sandringham Avenue, Harlow, Essex, CM19 5QA
Tel: +44 (0)1279 630922
Fax: +44 (0)1279 630939
Intersil Corporation is a leader in the design and manufacture of high-performance analog and mixed signal semiconductors. The Company’s products address some of the industry’s fastest growing markets, such as, flat panel displays, cell phones, other handheld systems, and notebooks. Intersil’s product families address power management functions and analog signal processing functions. Intersil products include ICs for battery management, hot-swap and hot-plug controllers, linear regulators, power sequencers, supervisory ICs, bridge drivers, PWM controllers, switching DC/DC regulators, Zilker Labs Digital Power ICs and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; D2Audio products; video and high-performance operational amplifiers; high-speed data converters; interface ICs; analog switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and radiation-hardened applications.
Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.