Digital to Analog conversion in Multisim

Thread Starter

xxxyyyba

Joined Aug 7, 2012
289
Here is schematic for Analog to Digital conversion:



Here are two Digital to Analog converters in Multisim:



Which one should I use? I want to connect it at output of ADC to get original sine wave. How should I connect it (which pins should I use)?

EDIT:
I found answer, however, other problem occurs :)
Here is schematic with 8bit DAC:



Here is transient analysis, showing input and output sine wave:



What are voltage spikes at output signal?
 
Last edited:

crutschow

Joined Mar 14, 2008
25,267
D/A converters can have spikes in there output when all all the bits are changing at an MSB rollover due to the fact that the interal switches can't all change instantly .
You need a low-pass filter or sample-and-hold at the output to smooth out the glitches.
 
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