modified 8 years ago

DAC manual input using an R 2R ladder

01:26:52

Calculating the values of resistors needed to make a DAC results in odd values that are often not practical, but there’s an elegant solution to this problem.  

By constructing a R/2R ladder resistor network on the input of the summing circuit, binary weighting can be achieved with only two kinds of resistor values! 
In this EC simulation, I have only done this for 4 bits but you could continue it to 8 bits.
Now you can obtain 16 analogue values from the 4 input switches.


Enjoy!

1001001

published 8 years ago

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.