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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