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AD673JP Datasheet(PDF) 1 Page - Analog Devices |
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AD673JP Datasheet(HTML) 1 Page - Analog Devices |
1 / 9 page FUNCTIONAL BLOCK DIAGRAM BURIED ZENER REF COMP- ARATOR ANALOG IN DB7 VCC VSS DIGITAL COMMON CONVERT INT CLOCK 8-BIT SAR DB6 DB5 DB4 DB3 DB2 DB1 DB0 MSB LSB ANALOG COMMON BIPOLAR OFFSET CONTROL DATA READY AD673 5k DATA ENABLE 8-BIT CURRENT OUTPUT DAC REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a 8-Bit A/D Converter AD673 FEATURES Complete 8-Bit A/D Converter with Reference, Clock and Comparator 30 s Maximum Conversion Time Full 8- or 16-Bit Microprocessor Bus Interface Unipolar and Bipolar Inputs No Missing Codes Over Temperature Operates on +5 V and –12 V to –15 V Supplies MIL-STD-883 Compliant Version Available GENERAL DESCRIPTION The AD673 is a complete 8-bit successive approximation analog-to-digital converter consisting of a DAC, voltage refer- ence, clock, comparator, successive approximation register (SAR) and 3-state output buffers—all fabricated on a single chip. No external components are required to perform a full ac- curacy 8-bit conversion in 20 µs. The AD673 incorporates advanced integrated circuit design and processing technologies. The successive approximation function is implemented with I 2L (integrated injection logic). Laser trim- ming of the high stability SiCr thin-film resistor ladder network insures high accuracy, which is maintained with a temperature compensated sub-surface Zener reference. Operating on supplies of +5 V and –12 V to –15 V, the AD673 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 the 20 µs conversion cycle. DATA READY indicates comple- tion of the conversion. The AD673 is available in two versions. The AD673J as speci- fied over the 0 °C to +70°C temperature range and the AD673S guarantees ±1/2 LSB relative accuracy and no missing codes from –55 °C to +125°C. Two package configurations are offered. All versions are also of- fered in a 20-pin hermetically sealed ceramic DIP. The AD673J is also available in a 20-pin plastic DIP. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 PRODUCT HIGHLIGHTS 1. The AD673 is a complete 8-bit A/D converter. No external components are required to perform a conversion. 2. The AD673 interfaces to many popular microprocessors without external buffers or peripheral interface adapters. 3. The device offers true 8-bit accuracy and exhibits no missing codes over its entire operating temperature range. 4. The AD673 adapts to either unipolar (0 V to +10 V) or bipolar (–5 V to +5 V) analog inputs by simply grounding or opening a single pin. 5. Performance is guaranteed with +5 V and –12 V or –15 V supplies. 6. The AD673 is available in a version compliant with MIL- STD-883. Refer to the Analog Devices Military Products Databook or current AD673/883B data sheet for detailed specifications. |
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