關于ad0809的詳細資料，英文版

General Description The ADC0808， ADC0809 data acquisition component is a monolithic CMOS device with an 8-bit analog-to-digital converter， 8-channel multiplexer and microprocessor compatible control logic. The 8-bit A/D converter uses successive approximation as the conversion technique. The converter features a high impedance chopper stabilized comparator， a 256R voltage divider with analog switch tree and a successive 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， excellent 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 multiplexer 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 VDC n Low Power 15 mW n Conversion Time 100 μs