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介绍了ＡＤ７７１５模／数转换器的基本技术参数，并针对分布式上下位机结构的无纸记录仪，在分析常用的两种获取Ａ／Ｄ采样值方法的基础上，提出了一种同步并行获取Ａ／Ｄ采样值的方法。凡采用分布式上下位机结构的数据采集仪表，同步并行技术对于如何合理使用Ａ／Ｄ芯片有着普遍的参考价值。
This paper introduces the basic technical parameters of AD7715 A / D converter and proposes a paperless recorder with distributed upper and lower computer. Based on the analysis of two commonly used A / D sampling methods, a synchronous parallel Get A / D sample values. Where the use of distributed upper and lower computer data acquisition instrumentation, synchronous parallel technology for the rational use of A / D chip has a universal reference value.