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Maxim's digital pots with EEPROM

Posted: 05 Apr 2005 ?? ?Print Version ?Bookmark and Share

Keywords:maxim integrated products? digital potentiometer? max5477? max5478? max5479?

Maxim Integrated Products unveiled what it claims as the industry's smallest 256-step, dual, nonvolatile digital potentiometers with on-chip EEPROM and packaged in a 3-by-3mm TQFN.

The integrated memory of the MAX5477/MAX5478/MAX5479 and MAX5487/MAX5488/MAX5489 enables the devices to operate like mechanical potentiometers by storing the wiper position prior to power down. This capability significantly reduces chip size, compared to mechanical pots, said Maxim. The new products also offer ratiometric and end-to-end temperature coefficients as low as 5ppm/C and 50ppm/C, respectively.

In addition, the pots save power by requiring less than 1?A in standby current and operating from a 2.7V to 5.5V single supply. End-to-end resistances of 10 kilohms, 50 kilohms and 100 kilohms are available. The MAX5477/MAX5478/MAX5479 use an addressable I?C interface, while the MAX5487/MAX5488/MAX54889 use an SPI interface.

Prices start at $1.87 for the MAX5477/MAX5478/MAX5479 and $1.87 for the MAX5487/MAX5488/MAX5489 (1,000-up, FOB USA).

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