8-bit digital potentiometer embeds high-performance EEPROM

Unterpremstaetten, Austria—austriamicrosystems has expanded its digital potentiometer portfolio with the AS1507, a 256-tap SPI-interfaced non-volatile dual digital potentiometer available with 10, 50 and 100k Ohms resistance.

The AS1507 is suitable for use in low-power environments, using a maximum of 500nA during standby and low 200µA (max) during operation, including the CMOS write current. Operating from a single supply from 2.7 to 5.5V, the AS1507 offers an end-to end resistance temperature coefficient of 90ppm/°C. The AS1507 delivers an integral nonlinearity (INL) of ±0.5LSB (max) as well as differential nonlinearity (DNL) of ±0.5LSB (max). A mute input signal allows a wiper reset to zero for both potentiometer registers.

The AS1507 digital potentiometer stores the wiper information in the integrated Hi-EPR (High Endurance, Performance & Retention) EEPROM, which allows 10 million write cycles at 25°C and 1 million write cycles at 85°C, which is 50 times more than conventional high grade EEPROM, the company said. Additionally, the AS1507 delivers 150 years of data retention at 85°C, storing the EEPROM information 15 times longer than standard high grade EEPROM. A ready signal indicates the end of a writing operation.

The AS1507 is available in a 16-pin TDFN 3-mm x 3-mm package.

Datasheet: Click here.


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