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ICL7109是一种高精度、低噪声、低漂移、价格低廉的双积分式12位A/D转换器,由于另有一位极性位输出,实际上具有13位A/D的精度。ICL7109的抗干扰能力很强,特别适用于噪声干扰大、速度要求不太高的测试环境。本文介绍8031单片机对ICL710A/D转换器的主动控制技术。该接口技术能使单片机在工作时不受A/D转换器发出中断的影响或其它的干扰,但又能保证转换数据不被丢失,因此这是一种十分有用的接口技术。一、接口电路 ICL7109与微机接口时,通常将RUN/HOLD(运行/保持)引脚接高电平。使其不断地作A/D转换。当采用直接方式接口时,由STATUS(状态信号)
The ICL7109 is a precision, low noise, low drift, low cost, dual-integrated 12-bit A / D converter that actually has 13-bit A / D accuracy due to one more polarity output. ICL7109 strong anti-interference ability, especially for noise interference, speed requirements are not too high test environment. This article describes the 8031 microcontroller ICL710A / D converter active control technology. This interface technology can make the one-chip computer work without interruption of A / D converter or other interference, but can guarantee the conversion data is not lost, so this is a very useful interface technology. First, the interface circuit ICL7109 and computer interface, usually the RUN / HOLD (Run / Hold) pin high. Make it constantly for A / D conversion. When using the direct interface, the STATUS (status signal)