CAT523 Datasheet | Catalyst Semiconductor

Advance Information Configured Digitally Programmable Potentiometer (DPP): Programmable Voltage Applications Features s Two 8-bit DPPS Configured as Programmable APPLICATIONS s Automated product calibration. s Remote control adjustment of equipment s Offset, gain and zero adjustments in Self- Voltages in DAC-like Applications s Buffered Wiper Outputs s Nonvolatile Wiper Storage s Output voltage range includes both supply rails s 2 independently addressable output wipers s 1 LSB Accuracy, High Resolution s Serial µP interface s Single supply operation: 2.7V-5.5V s Setting read-back without effecting outputs Calibrating and Adaptive Control systems. s Tamper-proof calibrations. s DAC (with memory) substitute DESCRIPTION The CAT523 is a dual, 8-bit digitally-programmable potentiometer 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 2 independently programmable DPPs have a mon output voltage range which includes both supply rails. The wipers are buffered by rail to rail OP AMPS. Wiper settings, stored in non-volatile 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 FUNCTIONAL DIAGRAM RDY/BSY V DD effecting the stored settings and stored settings can be read back without disturbing the DAC’s output. Control of the CAT523 is acplished with a simple 3 wire serial interface. A Chip Select pin allows several CAT523's to share a mon serial interface and munication back to the host controller is via a single serial data line thanks to the CAT523’s Tri-Stated Data Output pin. A...