Question

Page 3 of 4 Take Test Unt 1-2Lecare 2。apter 2 (10)-. Pags 4 of 4 What in the output of a Dra convertert (chapter 2) OAnalog signal QUESTION 6 1 paints Save Arer For an 8-bit digital to analog converter, if a digital value of 0000 1000 produces a voltage of 0.625V what is the resolution of DAC? (Chapter 2) O aos O 0078 O 16 O 10 QUESTION 10 What is the output of an ND convertert (Chapter 2 O Analog signal O Digtal signal Resistance QUESTION 7 1 points Save Answe For an 8-bit digital to analog converter, if a digital value of 0000 produces a voltage of T.25V what wouid a eO-agical Vahoe efi0010-0000 produce? (Chapter 2) Question Completion Status 3.75 O s 0625 0 25 1 peines Save Answer QUESTION Which device can be used to amplify the signal from a transacer? Chapter 2) O Mes Amp O Actuator Signal Generator Cick Save and Submt to sove and submt Click Sove All Awers to sove oll answers Sav ond Submit to sove and submit Chick Sove All Answers to sove all onswers tps /bb groe eda/webappsvasessment/take/launch ap course assessment id- 415495, spicourse assessment id- 415495 1... 5/8/2019

Answer 1

8 - bit value of 00001000 corresponds to 0 times 2^0 + 0 times 2^1 + 0 times 2^2 + 1 times 2^3 + 0 times 2^4 + 0 times 2^5 + 0 times 2^6 + 0 times 2^7 = 8 Total Number of step for 8 - bit DAC = 2^8 - 1 = 255 steps 8 - bit values of 0000 1000 corresponds to 8th step of DAC. Value of DAC at 0000 0000 = Ov value of DAC at 00000 1000 = 0.625 V therefore Resolution of DAC = 0.625/8 = 0.078125 V. therefore In one step DAC value changes by a step size of 0.078 V option (b) is correct \r\n 0001 0000 rightarrow 1.25 v rightarrow 0001 0000 corresponds to a value of 1 times 2^4 = 16. Therefore In 16th step value of DAC = 1.25 V therefore Resolution of DAC = 1.25/16 = 0.078125 V/step At 0010 0000 corresponding value = 1 times 2^5 = 32 therefore

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