ADC0808 National Semiconductor, ADC0808 Datasheet
ADC0808
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ADC0808 Summary of contents
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... TTL TRI-STATE ® outputs. The design of the ADC0808, ADC0809 has been optimized by incorporating the most desirable aspects of several A/D conversion techniques. The ADC0808, ADC0809 offers high speed, high accuracy, minimal temperature dependence, ex- cellent long-term accuracy and repeatability, and consumes minimal power ...
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... Connection Diagrams Dual-In-Line Package Order Number ADC0808CCN or ADC0809CCN See NS Package J28A or N28A Ordering Information TEMPERATURE RANGE ± Error 1 ⁄ LSB Unadjusted ADC0808CCN 2 ± 1 LSB Unadjusted ADC0809CCN Package Outline N28A Molded DIP www.national.com Molded Chip Carrier Package Order Number ADC0808CCV or ADC0809CCV DS005672-11 − ...
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... Voltage, Top of Ladder REF(+) Voltage, Center of Ladder V Voltage, Bottom of Ladder REF(−) I Comparator Input Current IN Electrical Characteristics Digital Levels and DC Specifications: ADC0808CCN, ADC0808CCV, ADC0809CCN and ADC0809CCV, 4.75 V −40˚C T +85˚C unless otherwise noted A Symbol Parameter ANALOG MULTIPLEXER I OFF Channel Leakage Current OFF(+) ...
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... Electrical Characteristics Digital Levels and DC Specifications: ADC0808CCN, ADC0808CCV, ADC0809CCN and ADC0809CCV, 4.75 V −40˚C T +85˚C unless otherwise noted A Symbol Parameter DATA OUTPUTS AND EOC (INTERRUPT) V Logical “1” Output Voltage OUT(1) V Logical “0” Output Voltage OUT(0) V Logical “0” Output Voltage EOC ...
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... DC component which is not passed by the AC am- plifier. This makes the entire A/D converter extremely insen- sitive to temperature, long term drift and input offset errors. Figure 4 shows a typical error curve for the ADC0808 as measured using the procedures outlined in AN-179 ⁄ ...
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Functional Description FIGURE 2. 3-Bit A/D Transfer Curve www.national.com (Continued) FIGURE 1. Resistor Ladder and Switch Tree DS005672-13 FIGURE 3. 3-Bit A/D Absolute Accuracy Curve FIGURE 4. Typical Error Curve 6 DS005672-2 DS005672-14 DS005672-15 ...
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Timing Diagram FIGURE 5. 7 DS005672-4 www.national.com ...
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... DS005672-21 Applications Information OPERATION 1.0 RATIOMETRIC CONVERSION The ADC0808, ADC0809 is designed as a complete Data Acquisition System (DAS) for ratiometric conversion sys- tems. In ratiometric systems, the physical variable being measured is expressed as a percentage of full-scale which is not necessarily related to an absolute standard. The voltage ...
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... FIGURE 9. Ratiometric Conversion System The ADC0808 needs less than a milliamp of supply current so developing the supply from the reference is readily ac- complished. In Figure 11 a ground referenced system is shown which generates the supply from the reference. The ...
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Applications Information FIGURE 11. Ground Referenced Conversion System with www.national.com (Continued) FIGURE 10. Ground Referenced Conversion System Using Trimmed Supply Reference Generating V Supply CC 10 DS005672-24 DS005672-25 ...
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Applications Information (Continued) FIGURE 12. Typical Reference and Supply Circuit = Ratiometric transducers FIGURE 13. Symmetrically Centered Reference 3.0 CONVERTER EQUATIONS The transition between adjacent codes N and N+1 is given by: The center of ...
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... The average value of the comparator input current varies di- rectly with clock frequency and with V Figure 6 . Typical Application *Address latches needed for 8085 and SC/MP interfacing the ADC0808 to a microprocessor PROCESSOR 8080 MEMR 8085 RD ...
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... Physical Dimensions inches (millimeters) unless otherwise noted Order Number ADC0808CCN or ADC0809CCN Order Number ADC0808CCV or ADC0809CCV Molded Dual-In-Line Package (N) NS Package Number N28B Molded Chip Carrier (V) NS Package Number V28A 13 www.national.com ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...