摘要
AD421是美国ADI公司推出的高性能模数转换器，其优良特性使其被广泛应用于各种智能变送器中及其他工业控制场合中。在简要介绍D／A转换器AD421的原理的基础上，着重说明了该芯片在流量监测中的应用，给出流量监测仪系统的硬件结构框图和软件设计；开发出一种集LED显示、RS485通信及4～20mA输出廉价的流量显示表，该流量监测仪性能可靠，可应用于多个工业场合。
AD421 was producted by ADI Company in Amercian. Its excellent capability made it can be used in all kinds of smart transmitter and others occasion. On the basis of simple introduces the operating principle of the DAC AD421, emphasizes it which applyed in the measure of flow. The design gives the chart of hardware - structure and sofeware. The smart transmitter include the 4-20 mA two- wire current output,RS 232 digital output and the display of LED. It is reliability and can be used in many occasion.
出处
《现代电子技术》
2007年第4期176-177,185,共3页
Modern Electronics Technique
基金
安徽省教育厅自然科学重点科研项目(2005kj006zd)
