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ON Semiconductor unveils single-channel DPP

An ON Semiconductor product story
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Edited by the Electronicstalk editorial team May 18, 2009

ON Semiconductor has added a 256-tap, single-channel linear-taper device to its range of digitally programmable potentiometers (DPP).

The CAT5140 digital potentiometer is a low-noise alternative to DACs and mechanical potentiometers.

It features an on-chip, 8-bit, non-volatile Eeprom memory, which allows designers to calibrate once and retain the wiper setting in memory on power-up.

The DPP also provides five additional non-volatile registers for general purpose data storage, as well as a volatile wiper register for applications requiring temporary storage.

The integrated memory options in the CAT5140 save board space and costs compared to DAC-based design approaches, which typically require external memory and additional interconnects.

Additionally, the ultra-low standby current (2uA max) of the CAT5140, combined with integrated memory, make it suitable for mechanical potentiometer replacement in space-constrained, hand-held applications.

Since it is digitally programmable, the CAT5140 is insensitive to mechanical vibrations, shock and oxidation, making it much more stable and reliable than mechanical potentiometers across most environmental conditions.

The CAT5140 is a single-channel, linear-taper digital potentiometer with a 400kHz, I2C-compatible interface for LCD screen adjustment; automated calibration; contrast, brightness and volume control; gain adjustment and line impedance matching applications.

Eeprom endurance for the CAT5140 is 2,000,000 data write stores and data retention is 100 years.

The digitally programmable potentiometer comes in a Pb-free, RoHS-compliant eight-lead MSOP package.

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