Lecture 14 - The A to D converter

Lecture 14 - The A to D converter - ECE265 1 ECE 265...

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ECE 265 LECTURE 14 Analog Signal Acquisition The A/D converters 12/1/2010 1 ECE265
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Joanne E. DeGroat, OSU Lecture Overview Analog signal acquistion The A/D Converters on the 68HC11 REF: Chapters 7 and 8 plus the 68HC11 reference manual. 12/1/2010 2 ECE265
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Joanne E. DeGroat, OSU Analog signals Analog output is typical of most transducers and sensors. Need to convert these analog signals into a digital representation so the microcontroller can use it. Some characteristics of analog signals. 12/1/2010 ECE265 3
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Joanne E. DeGroat, OSU Analog signals Analog output is typical of most transducers and sensors. Need to convert these analog signals into a digital representation so the microcontroller can use it. Some characteristics of analog signals. Maximum and minimum voltages 12/1/2010 ECE265 4
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Joanne E. DeGroat, OSU Analog signals Analog output is typical of most transducers and sensors. Need to convert these analog signals into a digital representation so the microcontroller can use it. Some characteristics of analog signals. Maximum and minimum voltages Precise continuous signals 12/1/2010 ECE265 5
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Joanne E. DeGroat, OSU Analog signals Analog output is typical of most transducers and sensors. Need to convert these analog signals into a digital representation so the microcontroller can use it. Some characteristics of analog signals. Maximum and minimum voltages Precise continuous signals Rate of voltage change 12/1/2010 ECE265 6
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Joanne E. DeGroat, OSU Analog signals Analog output is typical of most transducers and sensors. Need to convert these analog signals into a digital representation so the microcontroller can use it. Some characteristics of analog signals. Maximum and minimum voltages Precise continuous signals Rate of voltage change Frequency if not a steady state signal 12/1/2010 ECE265 7
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Analog-to-Digital Converters The ideal transfer function of a 3-bit ADC Full-scale (input voltage) range (FSR) Analog signal is
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Lecture 14 - The A to D converter - ECE265 1 ECE 265...

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