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vamanan
Guest
任何人都可以在电路转换0to5V至4 20mA.Is有任何IC的可用？
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F
FoxyRick
Guest
试试这些：[网址] http://www.analogmicro.de/english/products/am422.htm [/网址] [网址] http://www.analog.com/en/prod/0，2877，AD694产品， 00.html [/网址] [网址] http://focus.ti.com/docs/prod/folders/print/xtr101.html [/网址] [网址] http://focus.ti.com/docs/ [/网址]干杯，FoxyRick prod/folders/print/xtr110.html。
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IanP
Guest
另一个选择是采用如8针PICAXE - 08M小型微处理器，利用其产生的PWM输出4 - 20mA和设置它的模拟imputs一采取的0 - 5V（或任何你需要的）控制信号..看看这个例子：[网址] http://www.edaboard.com/viewtopic.php?t=163559&highlight=picaxe+420ma [/url]和看到它是简单和廉价的..此致，IanP
C
Candy8866
Guest
试试看：它可以告诉你如何0 - 5V直流转换器具来的4 - 20mA，直流电压隔离放大器是一种能的IC转换直流电压，输出电流或电压，根据负载没有关系的比较。它还告诉你如何设计PCB。[网址] http://www.szsunyuan.com/upload/2007122049991157.pdf [/网址] [网址] http://www.szsunyuan.com/upload/2007101755938085.pdf [ /网址]