CAT504 Datasheet | Catalyst Semiconductor

8-Bit Quad DACpot Features s Output settings retained without power s Output range includes both supply rails s 4 independently addressable outputs s 1 LSB Accuracy s Serial µP interface s Single supply operation: 2.7V-5.5V s Setting read-back without effecting outputs APPLICATIONS s Automated product calibration. s Remote control adjustment of equipment s Offset, gain and zero adjustments in Self- Calibrating and Adaptive Control systems. s Tamper-proof calibrations. DESCRIPTION The CAT504 is a quad 8-Bit Memory DAC designed as an electronic replacement for mechanical potentiometers and trim pots. 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 4 independently programmable DAC's have an output range which includes both supply rails. Output settings, stored in non-volatile EEPROM memory, are not lost when the device is powered down and are automatically reinstated when power is returned. Each output can be dithered to test new output values without effecting the stored settings and stored settings can be read back without disturbing the DAC’s output. FUNCTIONAL DIAGRAM VPP 3 VDD 1 VREF H 14 Control of the CAT504 is acplished with a simple 3 wire serial interface. A Chip Select pin allows several CAT504s to share a mon serial interface and munication back to the host controller is via a single serial data line thanks to the CAT504’s Tri-Stated Data Output pin. The CAT504 operates from a single 3- 5 volt power supply drawing just a few milliwatts of power. When storing data in EEPROM memory an additional 20 volt low current supply is required. The CAT504 is available in the 0 to 70° C mercial and - 40° C to + 85° C Industrial operating temperature ranges and...