I am trying to create a constant current output for my project between 0 - 10 mA.
I read we can convert voltage to current by using op amp http://www.allaboutcircuits.com/textbook/semiconductors/chpt-8/voltage-to-current-signal-conversion/
but I also found IC http://www.ti.com/lit/ds/symlink/xtr110.pdf
so for voltage current conversion do I have to use a IC like xtr110 or can I just use a op amp?
Also, xtr110 seems to only output 4-20 mA, is there a IC that can output 0-10 mA?
My output signal is 5-30v square wave and I am trying to convert to 0-10 mA.