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简要介绍了14位串/并行数模转换器件AD7840的功能、特性及其基本线结构和引脚功能,给出了采用AD7840设计的LED程控电流源的D/A转换方案及电路。
The function, characteristics, basic line structure and pin functions of the 14-bit serial / parallel digital-to-analog converter AD7840 are briefly introduced. The D / A conversion scheme and circuit of the LED programmed current source using the AD7840 are given.