论文部分内容阅读
概述A/D转换器的种类繁多,AD574模数转换器已被许多国外厂商用于各自的数据采集系统,国内也有不少单位选用AD574设计数据采集系统.有的器件制造厂正在引进生产这种先进的集成电路.AD574主要特点AD574是美国模拟器件公司制造的大规模集成电路,是目前国际市场上较先进的、高集成度、价格低廉的逐次比较式模数转换器.它的突出特点是芯片内部包含微机接口逻辑,可方便地与8080、8085、Z-80、6800、6502等通用微处理器系统配接.输入与TTL及CMOS兼容,数据总线可与微机数据总线直接相连,读写及转换命令由控制总线提供,输出可以是12位一次读出或分两次(先读高8位,再读低4位)读出.输入电压有单极性和双极性两种.对外可提供一个+10.000V基准电压,最大输出电流1.5mA.有较宽的温度使用范围并保证此温度范围内的线性度.
Overview A wide range of A / D converters, AD574 A / D converter has been used by many foreign manufacturers for their own data acquisition system, there are many domestic units choose AD574 design data acquisition system. Some device manufacturers are introducing the production of this AD574 Key Features The AD574 is a large scale integrated circuit manufactured by Analog Devices and is the most advanced, highly integrated and inexpensive analog-to-digital converter available on the international market today The chip contains microcomputer interface logic, which can be easily interfaced with common microprocessor systems such as 8080, 8085, Z-80, 6800, 6502. The input is compatible with TTL and CMOS, and the data bus can be directly connected with the microcomputer data bus to read and write And conversion command provided by the control bus, the output can be read out once in 12 bits or two times (read the first high 8, read low 4) read the input voltage has a unipolar and bipolar two. It provides a + 10.000V reference voltage and a maximum output current of 1.5mA. It has a wide temperature range and ensures linearity in this temperature range.