Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001
· After we have used a controller equation to estimate a value to put into our process, we must convert this from a digital value in the computers memory, to a physical voltage.
· This voltage is typically limited to 20mA in most computer boards, and drawing near this current reduces accuracy and life of the board.
· A simple circuit is shown below for a simple digital to analog converter.
· The calculations for the A/D converter resolution and accuracy still apply.
