【摘要】 电压测量是电量和非电量检测的一个重要部分。介绍了基于24位模/数器件AD7710的直流电压表头的硬件设计和软件设计。阐述了AD7710的模拟电压输入、基准电压输入以及与微处理器的数字接口电路。分析介绍了表头的采样滤波、快速平均、自动量程转换与校准技术。对印制电路板和软件设计等要注意的问题进行了讨论。更多还原

【Abstract】 Voltage measuring is very important and also generally.It is the final part of the non-electric quantity detecting in computerized measurement system.The hardware and software of the DC voltage meter based on AD7710 is proposed.The circuit of analog input,reference input and the serial digital interface with microcomputer of AD7710 is presented.The technology of digital filtering,calibrating,fast averaging and automatic range switching is detailed.And some problems in designing PCB for the high resolution are discussed.更多还原