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Digipot can store EEPROM info for 150 years

Posted: 21 Aug 2007 ?? ?Print Version ?Bookmark and Share

Keywords:digipot? EEPROM? 150 years date retention?

austriamicrosystems has expanded its digital potentiometer portfolio with the AS1506, an 256-tap SPI-interfaced nonvolatile digipot available with 10-, 50- and 100k resistance.

The AS1506 is suitable for use in low power environments, using a maximum of 500nA during standby and 200?A (max) during operation, including the CMOS write current. Operating from a single supply from 2.7V to 5.5V, the digipot offers an end-to end resistance temperature coefficient of 90ppm/C. It delivers an INL of 0.5LSB (max) and a DNL of 0.5LSB (max).

The AS1506 stores the wiper information in the integrated Hi-EPR EEPROM, which allows 10 million write cycles at 25C and 1 million write cycles at 85C50 times more than conventional high-grade EEPROM. Additionally, the AS1506 delivers 150 years of data retention at 85C, storing the EEPROM information 15 times longer than standard high-grade EEPROM.

"The AS1506 offers several advantages over analog potentiometers and competition's non-volatile digital potentiometers," said Walter Moshammer, marketing director for standard linear at austriamicrosystems. "Besides the obvious advantages of a digital potentiometer such as being vibration and shock proof, providing better resolution, small form factor, as well as increased overall performance, the AS1506 offers an outstanding EEPROM, which is able to hold the stored information for decades, even in the harshest environments, and endure millions of write cycles."

The AS1506 is available in a small 8-pin TDFN 3mm x 3mm packaging.

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