CAT523

The CAT523 is a dual, 8-bit digitally-programmable potentiometer (DPP™) configured for programmable voltage and DAC-like applications. Intended for final calibration of products such as camcorders, fax machines and cellular telephones on automated high volume production lines, it is also well suited for systems capable of self calibration, and applications where equipment which is either difficult to access or in a hazardous environment, requires periodic adjustment.

The two independently programmable DPPs CAT523 have a common output voltage range which includes both supply rails. The wipers are buffered by rail to rail op amps. Wiper settings, stored in non-volatile NVRAM memory, are not lost when the device is powered down and are automatically reinstated when power is returned. Each wiper can be dithered to test new output values without effecting the stored settings and stored settings can be read back without disturbing the DPP's output.

Control of the CAT523 is accomplished with a simple 3-wire, Microwire-like serial interface. A Chip Select pin allows several CAT523's to share a common serial interface and communication back to the host controller is via a single serial data line thanks to the CAT523's Tri-Stated Data Output pin. A RDY/BSY output working in concert with an internal low voltage detector signals proper operation of non-volatile NVRAM memory Erase/Write cycle.

The CAT523 is available in the 0C to 70C Commercial and -40C to + 85C Industrial operating temperature ranges and offered in 14-pin plastic DIP and SOIC mount packages.