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Jon Titus
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Re: Introduction: Fundamentals of Designing With Microcontrollers
Jon Titus   1/16/2012 7:35:45 PM
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Q: What is the input range of the ADC? What is the educational value of the kits you presented.

A:  The input range has a maximum of the supply voltage of the microcontroller.  An MCU with a +3.3-volt power source cannot accept a voltage over 3.3 volts on any input, although MCU manufacturers include a bit of tolerance.  The ADC range depends on the reference voltage, so read the data sheet for the MCU you plan to use.  For a 2.500-volt reference, for example, you can digitize a signal between 0 and 2.500 volts.  Some MCUs have an internal reference you can select, or you supply an external reference.



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