AD574A

a FEATURES Complete 12-Bit A/D Converter with Reference and Clock 8- and 16-Bit Microprocessor Bus Interface Guaranteed Linearity Over Temperature 0 ؇ C to +70؇ C – AD574AJ, K, L –55؇ C to +125؇ C – AD574AS, T, U No Missing Codes Over Temperature 35 ␮ s Maximum Conversion Time Buried Zener Reference for Long-Term Stability and Low Gain T.C. 10 ppm/ ؇C max AD574AL 12.5 ppm/؇ C max AD574AU Ceramic DIP, Plastic DIP or PLCC Package Available in Higher Speed, Pinout-Compatible Versions (15 ␮s AD674B, 80 ␮s AD774B; 10 ␮s (with SHA) AD1674) Available in Versions Compliant with MIL-STD-883 and JAN QPL +5V SUPPLY VLOGIC DATA MODE SELECT 12/8 CHIP SELECT CS BYTE ADDRESS/ SHORT CYCLE AO READ/CONVERT R/C CHIP ENABLE CE +12/+15V SUPPLY VCC +10V REFERENCE REF OUT ANALOG COMMON AC REFERENCE INPUT REF IN -12/-15V SUPPLY VEE BIPOLAR OFFSET BIP OFF 10V SPAN INPUT 10VIN 1 2 3 4 5 6 7 Complete 12-Bit A/D Converter AD574A* BLOCK DIAGRAM AND PIN CONFIGURATION STATUS STS DB11 27 MSB 26 DB10 25 DB9 24 DB8 23 DB7 22 DB6 21 DB5 20 DB4 19 DB3 18 DB2 17 DB1 DB0 16 LSB 15 DIGITAL COMMON DC DIGITAL DATA OUTPUTS 28 MSB CONTROL 3 S T A T E O U T P U T B U F F E R S CLOCK 3k SAR 12 N I B B L E A N I B B L E B N I B B L E C LSB COMP 12 8 9 10 19.95k 11 12 13 5k 9.95k 5k DAC N VEE 10V REF IDAC IDAC = 4 x N x IREF IREF 8k 20V SPAN INPUT 14 20VIN AD574A 12 PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS The AD574A is a complete 12-bit successive-approximation analog-to-digital converter with 3-state output b...