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在科研中,经常要用到8位以上的DAC变换器,一方面购买集成电路困难,另一方面价钱很贵。我们用常见的或者手中有的8位DAC变换器能够很方便地连接成9～16位的DAC变换器,具体用多少位由自己选择确定。我们根据手中的不同片子,成功地试验了三种电路。现在都以12位为例,分别分析一下组合式DAC变换器的工作原理和它们的不同特点。 1.用两个8位DAC集成电路片子和三个运算放
In scientific research, often use more than 8 DAC converter, on the one hand the difficulty of buying integrated circuits, on the other hand the price is very expensive. We use common or in the hands of some 8-bit DAC converter can be easily connected to 9 to 16-bit DAC converter, the exact number of bits chosen by their own choice. We have successfully tested three circuits based on the different pieces in our hands. Now 12 examples, respectively, analyze the working principle of the combined DAC converter and their different characteristics. 1. With two 8-bit DAC integrated circuit chip and three op amp