Analogue, Mixed Signal, LSI


Dual-channel digital potentiometers

11 November 2009 Analogue, Mixed Signal, LSI

ON Semiconductor has announced the availability of two new digitally programmable potentiometer (DPP) ICs suitable for high accuracy and stability for variable resistance adjustment applications in a wide range of industrial and consumer products. The CAT5270 and CAT5271 are dual-channel digital potentiometers with 256 resistor taps for fine resolution adjustment and an I²C-compatible interface for maximum interoperability. The new DPPs feature a volatile wiper register, making them ideally suited for applications using an MCU with on-chip memory for wiper recall, or for systems that do not require memory. The CAT5270 allows MCU control of up to 16 devices from a single bus, while the CAT5271 offers a single, fixed address. Both devices are available with end-to-end resistance options of 50 kΩ and 100 kΩ and can be used as a potentiometer or as a 2-terminal, variable rheostat.



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