The one bit digital to analog converter (DAC) is a magical circuit that accomplishes D/A conversion

without using any analog components. This a neat trick. The matched resistors required by

conventional current summing DACs become more and more difficult to make as the number of bits per

word increases. Even with laser trimming, temperature changes can adversely affect the linearity of such

converters. Avoiding the use of matched resistors results in a converter that is not only cheaper, but is

inherently linear.-The one bit digital to analog converter (DAC) is a magical circuit that accomplishes D/A conversion

without using any analog components. This is a neat trick. The matched resistors required by

conventional current summing DACs become more and more difficult to make as the number of bits per

word increases. Even with laser trimming, temperature changes can adversely affect the linearity of such

converters. Avoiding the use of matched resistors results in a converter that is not only cheaper, but is

inherently linear.