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Hi
可以采用REF200: http://www.ti.com.cn/cn/lit/ds/symlink/ref200.pdf 第十六页。
500uA的电流源是需要可调吗?
Hi
100uA,200uA,300uA,400uA,500uA的电路在REF200的datasheet上都有。
如果是要分别可控,可以按照上面推荐的datasheet第十六页的电路,选择合适的电阻即可得到不同的电流,可以用电阻调。