HIMA Z7136 数模转换可能会降低信号质量
一个数模转换器（数（字）－模（拟）转换器,数（字）－模,D2A，或者数字对数字)是一个将数字信号变成一个模拟信号。一；一个模数转换器(ADC)执行相反的功能。
有几个DAC结构；DAC是否适合特定应用取决于品质因数包括:解决，最大采样频率和其他人。数模转换可能会降低信号质量，因此应指定一个在应用中误差很小的DAC。
DAC通常用于音乐播放器将数字数据流转换成模拟数据流音频信号。它们也用于电视和移动电话将数字视频数据转换成模拟视频信号。这两种应用在频率/分辨率权衡的两端使用DAC。音频DAC是一种低频、高分辨率类型，而视频DAC是一种高频、中低分辨率类型。
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