I am trying to create a constant current output for my project between 0 - 10 mA.
My output signal is 5-30v square wave and I am trying to convert to 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 should I use a op amp?
Assuming I am new to general electronics, and have budget.
Also, is there anything I should keep in mind when using IC
Also, I am using AD822 op amp, and I am seeing weird behaviour with a simple circuit.
for inverting I get correct Vout = (Rf/Rin) x Vin
but for
My Vin is 5v, Rg = 10K, Rf = 20K, should Vout should max at Rf/Rg x Vin + 1 = 11V
but my Vout is exceeding 11V as Vcc increase, and - pin is also increasing with Vcc but max at 5V.
I read that op amp +pin -pin should have same voltage.
Sorry for my newbie question.
Can anyone clarify?
Thank you.
My output signal is 5-30v square wave and I am trying to convert to 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 should I use a op amp?
Assuming I am new to general electronics, and have budget.
Also, is there anything I should keep in mind when using IC
Also, I am using AD822 op amp, and I am seeing weird behaviour with a simple circuit.
for inverting I get correct Vout = (Rf/Rin) x Vin
but for
My Vin is 5v, Rg = 10K, Rf = 20K, should Vout should max at Rf/Rg x Vin + 1 = 11V
but my Vout is exceeding 11V as Vcc increase, and - pin is also increasing with Vcc but max at 5V.
I read that op amp +pin -pin should have same voltage.
Sorry for my newbie question.
Can anyone clarify?
Thank you.