The step size of the DAC of Figure 11-5 can be changed by changing the value of
Question:
The step size of the DAC of Figure 11-5 can be changed by changing the value of RF. Determine the required value of RF for a step size of 0.5 V. Will the new value of RF change the percentage resolution?
Figure 11-5
Transcribed Image Text:
D C B 1 ΚΩ MSB 2 ΚΩ 4 ΚΩ 8 ΚΩ LSB Digital inputs: O V or 5 V (a) R = 1 k Op- amp +Vs -Vs VOUT D 0000 0000 1 1 1 1 1 1 1 1 Input code C B 0000 TTTT 1 1 1 1 0000 1 1 1 1 1100 COTT 0 0 1 1 COTT 0 0 1 1 COTT 0 0 1 1 G A 1100 0101 0101 OTOT 0 1 0 1 VOUT (volts) 0 -0.625LSB -1.250 -1.875 -2.500 -3.125 -3.750 -4.375 -5.000 -5.625 -6.250 -6.875 -7.500 -8.125 -8.750 -9.375- Full- scale
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The step size of the DAC of Figure 115 can be calculated using the following equation Step size Vref ...View the full answer
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Related Book For
Digital Systems Principles And Application
ISBN: 9780134220130
12th Edition
Authors: Ronald Tocci, Neal Widmer, Gregory Moss
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