Digital to Analog Converter (DAC) - Contol and Instrumentation - Multisim

 DIGITAL TO ANALOG CONVERTER

In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog-signal

1. Binary Weighted Resistors DAC.
2. R-2R Ladder Digital to Analog Converter (DAC)

Here we use these two methods only

Binary Weighted Resistors DAC:

                                   A weighted resistor DAC produces an analog output, which is almost equal to the digital (binary) input by using binary weighted resistors in the inverting adder circuit. In short, a binary weighted resistor DAC is called as weighted resistor DAC.

Circuit Diagram:

Simulation Circuit:

Components Used are

1. IC741
2. Resistor Rf   1 k ohm (feedback resistor)
3. Resistors 10 k, 5 k, 2.5 k ohm
4. Multimeter
5. Digital constant (on the left side b0,  b1,  b2) 

you can find the digital constant in digital sources shown in below picture 

Tabulation:

R-2R Ladder Digital to Analog Converter (DAC)

                                       The R-2R Ladder DAC overcomes the disadvantages of a binary weighted resistor DAC. As the name suggests, R-2R Ladder DAC produces an analog output, which is almost equal to the digital (binary) input by using a R-2R ladder network in the inverting adder circuit

Circuit Diagram:

                  

Simulation Circuit:

Components Used are

1. IC741
2. Resistor Rf   2.2 k ohm (feedback resistor)
3. Resistors   3  -  1.1 k,   5  -  2.2  k ohm
4. Multimeter
5. Digital constant (on the left side a0,  a1,  a2,  a3 ) 

Tabulation:

Formula Used:

Here the 1st formula is for Binary Weighted Register Method

              2nd formula is for R - 2 R Ladder Method

Model Calculation:

 Binary Weighted Register Method

R - 2 R Ladder Method

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