Digital to Analog conversion in Multisim

Thread Starter


Joined Aug 7, 2012
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)?

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:


Joined Mar 14, 2008
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.