DAC in ECE Academic Lab Slides by Zachary Chan
Explore digital-to-analog converters in ECE academic labs with slides by Zachary Chan. Learn about the importance of DACs in microcontrollers, resolution based on bits, common DAC types like Binary Weighted Resistor and R2R Ladder, and how they impact signal output quality.
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Presentation Transcript
DIGITAL TO ANALOG CONVERTER GT ECE ACADEMIC LAB SLIDES BY ZACHARY CHAN
OVERVIEW In order to output a continuous signal, microcontrollers need to output analog signals (current and voltage) even though they store digital signals Also called DACs Microcontrollers typically have them built in
RESOLUTION The resolution of a DAC is based on how many bits is uses to represent signals An n-bit DAC has 2^n step levels Higher resolution will output the analog signal better
COMMON DACS Binary Weighted Resistor R2R Ladder
BINARY WEIGHTED RESISTOR Each resistor has a different value This increases the probability of error in the circuit, especially as more bits of resolution are added
R2R LADDER Only uses resistors with two different values, so it is easier to manufacture with accuracy This means it is easier to add more bits of resolution Preferred DAC as opposed to the Binary Weighted Resistor DAC
