Analog-to-Digital convertor, modified. Assume that you have a 12-bit A/D converter that can digitize an analog...

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Electrical Engineering

Analog-to-Digital convertor, modified. Assume that youhave a 12-bit A/D converter that can digitize an analog voltageover the range of 0.00 Volts to + 3.30 Volts (just like the one inthe TM4C123G).

(a) What is the minimum voltage that an analoginput voltage could change and be guaranteed to be detected by achange in the digital output value? E.g. in millivolts ormicrovolts.
(b) What is the binary number that represents ananalog voltage of +1.11 volts?
(c) Suppose that the A/D converter is connected toa microprocessor with a 16-bit wide data bus. What would thehexadecimal number be for an analog voltage of +2.96V?
(d) Assume that the A/D converter is a successiveapproximation-type A/D converter. How many samples must it takebefore it finally digitizes the analog voltage?
(e) Suppose that the A/D converter is beingcontrolled by a 1 MHz clock signal and a sample occurs on therising edge of every clock. How long will it take to digitize ananalog voltage?
Thank you for the help! Much appreciated!

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4.1 Ratings (782 Votes)

a Between minimum possible value 000000000000 and maximumpossible value 111111111111 a 12bit AD converter has212 possible digital outputs ie 212quantization levels000000000000 represents analog voltage 000 V111111111111 represents analog voltage 330 VThe smallest analog voltage detectable by this AD converter isthe change denoted by the differenece between two consecutivedigital outputs that have only one bit position different ie thedifference in terms of analog See Answer

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