ecel303_lab4se - DrexelUniversity...

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TITLE: Analog to Digital Conversion NAME: Seher Ahmad PARTNER: Palak Chandra TA: Nicholas Vacirca SECTION: ECEL 303-061 DATE PERFORMED: 04/26/2007 DATE DUE: 05/04/2007 DATE RECEIVED Drexel University Electrical and Computer Engineering Dept. Electrical Engineering Laboratory III, ECEL-303
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ANALOG-TO-DIGITAL CONVERSION Objective The object of this experiment was to learn the elements of an analog-to-digital converter and to utilize an analog-to-digital chip in the laboratory. For the purpose of this lab, the A/D converter chip ADC 0804 was used in a variety of settings. The results were seen on LED displays which indicated the output that resulted from the corresponding input setting. Circuit Diagrams Fig. 1. Free Running Analog-Digital Converter (ADC 0804) with Pins Labeled and Numbered Performed by Palak Chandra and Seher Ahmad on April 26, 2007
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Fig. 2. Detailed Block Diagram of the ADC 0804 Chip Performed by Palak Chandra and Seher Ahmad on April 26, 2007
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Graphs and Relevant Displays Fig. 3. Plot of the ADC’s Output Waveform (Assuming zero input) captured From the Oscilloscope for Part 1 Freq = 364.6 kHz, V p-p = 4.750 V Performed by Palak Chandra and Seher Ahmad on April 26, 2007 Voltage Time
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Fig. 4. Plot of the ADC’s Output Waveform (with 10 kΩ resistor) captured from the Oscilloscope for Part 1 Freq = 552.5 kHz, V p-p = 4.500 V, R temp = 9.979 kΩ Performed by Palak Chandra and Seher Ahmad on April 26, 2007 Voltage Time
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The resolution for a system is given by the following equation, Resolution = 2 FS n V , n = number of bits (8) Equation 1 Shaded implies the LED is ON, but the State is OFF Fig. 5. LED Read-outs (On/Off) for Un-tuned V FS = 5V (Part 4) Performed by Palak Chandra and Seher Ahmad on April 26, 2007 For the above system, the resolution is given by, 8 5 2 V = 19.53 mV bit Shaded implies the LED is ON, but the State is OFF Fig. 6. LED Read-outs (On/Off) for Fine-tuned V FS = 5V (Part 5) Performed by Palak Chandra and Seher Ahmad on April 26, 2007
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For the above system, the resolution is given by, 8 5 2 V = 19.53 mV bit Shaded implies the LED is ON, but the State is OFF Fig. 7. LED Read-outs (On/Off) for Fine-tuned V
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This note was uploaded on 12/02/2011 for the course ECEL 353 taught by Professor Gerber during the Spring '11 term at Hanoi University of Technology.

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ecel303_lab4se - DrexelUniversity...

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