Lec13 - 13-1EE 319KIntroduction to MicrocontrollersLecture...

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Unformatted text preview: 13-1EE 319KIntroduction to MicrocontrollersLecture 13: DAC, Sound on 9S12, Lab8Ramesh Yerraballi13-2Digital to Analog ConversionExamplesSignal generation (sound, image, touch)Output to affect external devices (power, flow, heat)The DAC precision is the number of distinguishable DAC outputs (e.g., 16 alternatives, 4 bits). The DAC range is the maximum and minimum DAC output (0 to 5V). The DAC resolution is the smallest distinguishable change in output. (5V/16 =0.31V)Range(volts) = Precision(alternatives) * Resolution(volts)The DAC accuracy is (Actual - Ideal) / Ideal Ramesh Yerraballi13-32-bit DAC - Two DesignsNQ1QV1(V)V2(V)0 00.000.0010 51.251.6725 02.503.3335 53.755.00Q1Q10k20120110202Ramesh Yerraballi13-44-bit DACNQ3Q2Q1QtheoryVout(V)0 0 0 5*0/15 0.0010 0 0 55*1/15 0.3320 0 5 5*2/15 0.6785 0 0 5*8/15 2.67155 5 5 55*15/155.005*15/155....
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This note was uploaded on 01/25/2010 for the course EE 319K taught by Professor Bard during the Spring '08 term at University of Texas at Austin.

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Lec13 - 13-1EE 319KIntroduction to MicrocontrollersLecture...

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