# what is the disadvantage of binary weighted type dac?

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