Dual-channel dig-pots offer 256-resitor taps

Dual-channel dig-pots offer 256-resitor taps

The CAT5270 and CAT5271 digitally programmable potentiometer (DPP) ICs are dual-channel devices with 256 resistor taps for fine resolution adjustment and an I2 C-compatible interface for maximum interoperability. The CAT5270 allows microprocessor 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 and 100 kΩ and can be used as a potentiometer or as a 2-terminal, variable rheostat. The volatile wiper register for both devices is set to midscale on power-up. The CAT5270 and CAT5271 are supplied in 14-lead TSSOP and 10-lead MSOP packages, respectively. Both offer a temperature coefficient of 100 ppm/°C. (Ea/10,000: CAT5270, $0.81;$ CAT5271, $0.90 — available now)

ON Semiconductor , Phoenix , AZ
Sales 602-244-6600
http://www.onsemi.com