Each instruction in an assembly program has the … If n- then smallest resistor =2 R=2R/s & largest resistor=$2^{\gamma}R=128 R/2$. Simultaneous ADC, Stairstep Ramp ADC, and Successive Approximation ADC. The binary-weighted-resistor DAC employs the characteristics of the inverting summer Op Amp circuit. i) The accuracy and stability of this tyoe DAC depends on the accuracy of the resistors used . 6 : - What is the disadvantage of binary weighted type DAC ? High resolution and accuracy can be achieved. What is the major advantage of the R/2R ladder D/A converter as compared to a binary-weighted-input D/A converter? R-2R Ladder Digital to Analog Converter (DAC) The R-2R ladder DAC constructed as a binary-weighted DAC that uses a repeating cascaded structure of resistor values R and 2R. 14 . What are the three types of ADC's? High operating frequency . ii) This type of DAC requires a wide range of resistor values. Answer to No . If n=8 then smallest resistor 2 R=2R/2 & largest resistor $2^{\gamma}=128 R/2$. There are many techniques in which this is done, each with its own advantage and disadvantage. Binary-Weighted Digital to Analog Converter. Advantages of Digital to Analog Converter (DAC) The advantages of Digital to Analog Converter are: Weighted Resistor Circuit is the fastest converting circuit compared to other methods. Since it's constructed from resistors with only two values, it overcomes the disadvantage of a binary-weighted DAC. Disadvantages of Digital to Analog Converter (DAC) The disadvantages of DAC are: The following figure shows the n-bit counter type ADC. The output voltage of a DAC is VD which is equivalent to corresponding digital input to DAC. Figure 1: a weighted DAC. A 4-bit R/2R D/A converter has a reference of 5 volts. What is the analog output for the input code 0101? High power DAC’s are simple to implement. In contrast, the R-2R ladder network uses only two values of resistance. The counter type ADC is constructed using a binary counter, DAC and a comparator. In this article we will learn how a DAC works and how it can be used in out designs. B . Design a 4-bit, weighted-resistor DAC whose full-scale output voltage is -10 V. Logic levels are 1’= +5 V and 0 == 0 V. This improves the precision due to the relative ease of producing equal valued-matched resistors (or current sources). What is the major advantage of the R/2R ladder D/A converter as compared to a binary-weighted D/A converter? C . The picture is a bit simplified as it lacks the digital switches that switch the 4 bits on and off, but the basic gist remains the same. Require wide range of resistors . weighted resistor DAC). If the range of output voltage of a 6-bit DAC … Operation: The n-bit binary counter is initially set to 0 by using reset command. A . A Digital to Analog Converter commonly referred as DAC, D/A or D2A is a device that converts binary values (0s and 1s) to a set of continuous analog voltages. Below we have a simple, 4-bit binary-weighted digital to analog converter (a.k.a. The principal disadvantage of this type of converter is that a different-valued precision resistor must be used for each digital input. The binary-weighted-resistor DAC employs the characteristics of the inverting summer Op Amp circuit. i) The accuracy and stability of thie type DAC depends on the accuracy of the resistors used. 15 . Thus the largest resistor is 128 times the smallest one. Thus the largest resistor is 128 times the smallest one . If the input resistor values are set to multiples of two: 1R, 2R and 4R, the output voltage would be equal to the sum of V … Example 19-2. ii) This type of DAC requires a wide range of resistors values. In this type of DAC, the output voltage is the inverted sum of all the input voltages. 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