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ADC0809CCV Folha de dados(PDF) 1 Page - National Semiconductor (TI) |
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ADC0809CCV Folha de dados(HTML) 1 Page - National Semiconductor (TI) |
1 / 14 page ADC0808/ADC0809 8-Bit µP Compatible A/D Converters with 8-Channel Multiplexer General Description The ADC0808, ADC0809 data acquisition component is a monolithic CMOS device with an 8-bit analog-to-digital con- verter, 8-channel multiplexer and microprocessor compatible control logic. The 8-bit A/D converter uses successive ap- proximation as the conversion technique. The converter fea- tures a high impedance chopper stabilized comparator, a 256R voltage divider with analog switch tree and a succes- sive approximation register. The 8-channel multiplexer can directly access any of 8-single-ended analog signals. The device eliminates the need for external zero and full-scale adjustments. Easy interfacing to microprocessors is provided by the latched and decoded multiplexer address inputs and latched 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. These features make this device ideally suited to applications from process and machine control to consumer and automotive applications. For 16-channel mul- tiplexer with common output (sample/hold port) see ADC0816 data sheet. (See AN-247 for more information.) Features n Easy interface to all microprocessors n Operates ratiometrically or with 5 VDC or analog span adjusted voltage reference n No zero or full-scale adjust required n 8-channel multiplexer with address logic n 0V to 5V input range with single 5V power supply n Outputs meet TTL voltage level specifications n Standard hermetic or molded 28-pin DIP package n 28-pin molded chip carrier package n ADC0808 equivalent to MM74C949 n ADC0809 equivalent to MM74C949-1 Key Specifications n Resolution 8 Bits n Total Unadjusted Error ±1⁄2 LSB and ±1 LSB n Single Supply 5 V DC n Low Power 15 mW n Conversion Time 100 µs Block Diagram TRI-STATE® is a registered trademark of National Semiconductor Corp. DS005672-1 See Ordering Information October 1999 © 1999 National Semiconductor Corporation DS005672 www.national.com |
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