analog (DTA) conversion is needed more frequently than most people are
aware of. The visible DTAs sre used wherever a digital system has to
deliver an analog output. The invisible DTAs are often found in the
feedback paths of anlog to digital (ADC)
Up to about 5
bit accuracy simple resistor networks work fairly well.
This kind of
network only uses resistors of similar values to improve matching
properties. Usable up to 10bit.