Amplify Analog Output

[ebf11]

I want to use the analog output on my USB-6001 DAQ to drive a proportional air regulator. The regulator requires a max current of 20mA given the 0-10 output voltage on the DAQ. The DAQ's analog output is only able to supply a maximum current of 5mA. Is there a way to amplify this current to the needed 20mA while maintaining the 0-10V output? Any help or direction is greatly appreciated, thank you.

[santo_13]

You can implement a high-current buffer such as OPA633 at the output of DAQ.

Note: this requires a basic understanding of electronics and building circuits. In addition, the external OPAMP buffer will require an external power supply and the input offset voltage of the selected OPAMP will affect the accuracy of voltage generated by the DAQ.

How much current do you need?

This is a good article to learn OPAMP buffering techniques - https://www.allaboutcircuits.com/technical-articles/how-to-buffer-an-op-amp-output-for-higher-curren...

[crossrulz]

Just find an OpAmp that can handle the current you need (20mA shouldn't be hard) and use Voltage Follower configuration to buffer your signal.

[santo_13]

After @crossrulz comment, I realized that you require 20mA but the DAQ provides only 5mA.

In this case, any common purpose OPAMP should be able to provide the 20mA, do consider the input offset of OPAMP if you need an accurate voltage generation.