ECET 340 Week 5 HomeWork 5

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DEVRY ECET 340 Week 5 HomeWork 5

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• 1. Explain, briefly, why an analog restoring
  filter is sometimes used at the output of a DAC.
• 2. Given Iref 2 mA for a DAC1408 IC, find Iout
  for the input 1110 1110
• 3. Find the number of discrete voltages output by
  a 12-bit DAC. Show work.
• 4. Use the internet to locate the data sheet for
  an MC1408 DAC. From it find, for the MC1408-7
  version, the following
• a. The settling time

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• b. Accuracy at full scale output current (1.99
  mA), 25ºC
• c. Output current range when -7V ltvee""gtlt
  -15v"" is"" used.""gt
• 5. Assume that an MC1408 DAC is attached to Port
  T of an HC12 Microprocessor as shown below.
  Verify that the program below outputs 8 different
  values to the DAC and determine the output
  voltage (Vout) after each output operation. Show
  your work in the space below
• 6. How does the SCI system achieve
  synchronization between the transmitter and
  receiver?
• 7. The SCI1 serial port is initialized for 8 data
  bits, 1 stop bit and 2400 baud. How much time is
  required to data transfer 3000 characters?
• 8. Why is the maximum data rate of the SPI system
  faster than the SCI system?
• 9. Discuss the advantages and disadvantages of
  the SCI versus SPI data transfers.