Discuss the resistive divider D/A converter. Find the general expression for the output voltage of a resistive divider network.
Using the resistive divider network, draw the circuit of a 6-bit D/A converter and explain its operation. What are the drawbacks of this D/A converter?
Show that the outputs of a binary weighted resistor network are directly proportional to the binary inputs.
Draw the schematic diagram of a resistive divider D/A converter. Explain its operation. Mention the drawbacks of this converter.
A 5-bit resistive divider network has 10 volts full-scale output, find the output voltage for a binary input 10101. (Ans. 6.5625 V)
A 6-bit resistive divider D/A converter has a resistance of 100 KΩ in the MSB branch.
The reference voltage is 15 V. The resistance in the feedback path of the operational amplifier is 39 \(k\Omega\). What is the output voltage for the binary input 101101?
(Ans. – 8.22V)
For a 6-bit resistive divider network, the reference voltage is 10 V, find the following:
(i) Full-Scale output voltage. (Ans.: 10 V)
(ii) The analog output voltage for a digital input of 010011. (Ans.: 3.02 V)
(iii) The output voltage change due to the least significant bit. (Ans.: 0.16 V)
Draw the schematic diagram of a binary ladder D/A converter. Explain its operation. Mention its merits and demerits.
Find the expressions for the output due to MSB and second MSB of a 4-bit binary ladder network.
Discuss the binary ladder D/A converter. Find the general expression for the output voltage of a binary ladder network.
What are the performance criteria for the D/A converter? Discuss their importance while selecting a D/A converter.
For a 6-bit binary ladder D/A converter the input levels are 0 = 0 V and 1 = 10 V, find
(i) The output voltages caused by each bit. (Ans. (i) -5 V, -2.5 V, -1.25 V, -0.625 V, -0.3125 V, -0.15625 V)
(ii) The output voltage corresponds to an input of 101101. (Ans. (ii) –7.03125 V)
(iii) The full-scale output voltage of the ladder. (Ans. (iii) –9.84 V)
For a 5-bit binary ladder D/A converter, the input levels are 0 = 0 V and 1 = 10 V, find the output voltage corresponding to binary input of (i) 10111 (Ans. –7.1875 V) (ii) 01101 (Ans. –4.0625 V).
What is the step size (or resolution in volts) of a 10-bit D/A converter if the full-scale output is +10 volts? Find the percentage resolution also. (Ans. 9.78 mV, 0.0978 %)
How many bits are required at the input of a D/A converter to achieve a resolution of 15 mV if the full-scale output is 15 volts? (Ans. 10 bits)