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ADC0809 8-Bit μP Compatible A/D Converters with 8-Channel Multiplexer

ADC0809DIP

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Analog to digital converters find huge application as an intermediate device to convert the signals from analog to digital form. These digital signals are used for further processing by the digital processors. Various sensors like temperature, pressure, force etc. convert the physical characteristics into electrical signals that are analog in nature.

DC0809 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 ADC0809 has been optimized by incorporating the most desirable aspects of several A/D conversion techniques. The 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.

Features:

  • Easy interface to all microprocessors
  • Operates ratiometrically or with 5V DC or analog span adjusted voltage reference
  • No zero or full-scale adjust required
  • 8-channel multiplexer with address logic
  • 0V to 5V input range with single 5V power supply
  • Outputs meet TTL voltage level specifications
  • Standard hermetic or molded 28-pin DIP package
  • 28-pin molded chip carrier package
  • ADC0809 equivalent to MM74C949-1


Key Specifications:

  • Resolution: 8 Bits
  • Total Unadjusted Error: ±1⁄2 LSB and ±1 LSB
  • Single Supply: 5V
  • DC: Low Power 15 mW
  • Conversion Time: 100 μs

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