Digital to Analog Conversion

(Published Jan. 2008)

Digital to 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) converters.

1. Resistor Networks

Up to about 5 bit accuracy simple resistor networks work fairly well.

2. R, 2R Networks

This kind of network only uses resistors of similar values to improve matching properties. Usable up to 10bit.