AD573

a FEATURES Complete 10-Bit A/D Converter with Reference, Clock and Comparator Full 8- or 16-Bit Microprocessor Bus Interface Fast Successive Approximation Conversion—20 ␮s typ No Missing Codes Over Temperature Operates on +5 V and –12 V to –15 V Supplies Low Cost Monolithic Construction V+ 5k 10-Bit A/D Converter AD573* FUNCTIONAL BLOCK DIAGRAM V– DIGITAL COMMON CONVERT MSB DB9 DB8 10-BIT CURRENT OUTPUT DAC COMPARATOR 10-BIT SAR ANALOG IN ANALOG COMMON DB7 DB6 DB5 HIGH BYTE BIPOLAR OFFSET CONTROL INT CLOCK DB4 DB3 DB2 DB1 DB0 LSB HBE LOW BYTE BURIED ZENER REF DATA READY LBE AD573 PRODUCT DESCRIPTION The AD573 is a complete 10-bit successive approximation analog-to-digital converter consisting of a DAC, voltage reference, clock, comparator, successive approximation register (SAR) and three state output buffers—all fabricated on a single chip. No external components are required to perform a full accuracy 10-bit conversion in 20 µs. The AD573 incorporates advanced integrated circuit design and processing technologies. The successive approximation function is implemented with I2L (integrated injection logic). Laser trimming of the high stability SiCr thin-film resistor ladder network insures high accuracy, which is maintained with a temperature compensated subsurface Zener reference. Operating on supplies of +5 V and –12 V to –15 V, the AD573 will accept analog inputs of 0 V to +10 V or –5 V to +5 V. The trailing edge of a positive pulse on the CONVERT line initiates...