Question

11. The MC1408 is an 8-bit D/A converter with equal reference and output resistors. If the reference voltage is 5.0 V. 4,4,4,4,41 a. What is the voltage step size? Solution Use the circuit below to answer the three questions·LEDI is Yellow andLED2 is AMBER and typically, Vr 1.85 V 8.5 mA. The NAND gates are 741S00 with 0.35 V as typical VoL. Show complete work in the space provided 14.6, 4 a. If A10 and Ai = 1, which LED is ON? b. Calculate a typical value for Rg. (Round up calculated resistor value to the nearest 7. standard 5% resistor, refer to attached data sheet) If Az is now 1 while Ai stays at 1, what is LED is on? c. ALED2 Rg Rg Solution IS. Use the schematic shown in Figure 28-1 to nswer the following a What is the step sine? (4 ps) b. If the analog input voltage is 2.48 V, what will be the digital output of the 0chg? (4 pes c. What decimal number will be displayed on the MAN727 (3 ps) เอเก LT S0V 12 14 14 DGND D เร GND cs 1.8 17 WR INTR 1.0เก GND 10 .s0V FIGURE 28-1

Answer 1

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