ADC/DAC Design

Thread Starter


Joined May 19, 2013
I have a homework until the next month to choose a DAC or ADC and design it in LTSpice so that it satisfies some parameters (the parameters are not imposed...I choose the values).

The problem is I never did something like this before.

Can someone point me into the right direction? Give me a list of baby steps to follow maybe.

I am completely lost.

I know what the ADC or DAC 's role is. I view them more like black boxes.


Joined Nov 23, 2012
Well, I would start by.
- googling ADC or DAC and reading the Wikipedia pages
- maybe reading about them in my text book

- Then find a simple, old-school part number of an 8-bit ADC
- Look up the datasheet
- Find the block diagram and circuit's schematic on the datasheet and figure out how it works.
- look at the recommended external parts for use in non application at the back of the datasheet.

Start to think about how it could be simulated.


Joined Mar 18, 2008
We used to use an ADC0800 8-Bit A/D Converter by Texas Instruments. Look at any Ti's datasheets for A/D's they were the best and still are.



Joined Mar 31, 2012
One place to start might be looking at how to bit-bang a DAC using a digital output port and some resistors followed by a voltage-follower buffer. You can start with just two or three bits to get the feel and then go to a few more bits to start seeing how the precision of the resistors starts coming into play.