How do I amplify the current of a 0-10VDC?

[rainman]

Hi all,

I'm using a controller with differential DAC output of +-10VDC, 3mA. I would like to amplify the output to say 100mA.

Eg; 6.5VDC 3mA to 6.5VDC 100mA

Is there any way can I DIY a circuit to achieve this or simply purchase an amplifier/ PLC (that takes in low current DAC and output higher DAC)

Thanks.
Rgds.

[doorknob]

What frequency does your 0-10v signal operate at? How much noise can be tolerated in the output signal? What level of accuracy do you need in the output voltage compared with the input voltage?

There are a variety of electronic circuits that you could DIY to handle that requirement. In theory, you would want to find an amplifier circuit or IC that has a high-impedance input and a low-impedance output, while meeting constraints such as the ones that I listed above.

[Al_The_Man]

Simple OP amp set for a gain of 1?
Al.

[TaK]

It would help to know what devices you are trying to interface. 100mA is a pretty large current requirement for a signal line. It can be done, but there might be an easier solution for what you want to do.

[rainman]

Originally Posted by TaK It would help to know what devices you are trying to interface. 100mA is a pretty large current requirement for a signal line. It can be done, but there might be an easier solution for what you want to do.

The receiving end is IPG YLS-200 laser, basically the 0-10VDC is meant to modulate the power of the laser.

There is no mention of the power requirement for this DAC input from the manual, support from the local sales person is bad as well. (100mA is just my own guess)

So I think I might get help from the forumers here.

[rainman]

Originally Posted by Al_The_Man Simple OP amp set for a gain of 1? Al.

That's a straight forward and simple suggestion.

I'm looking at this, http://www.farnell.com/datasheets/57949.pdf

Probably will get 1-2pc to try out.

Thanks.

[Al_The_Man]

As suggested, your input may not require 100ma as this IS fairly high for analogue control input?
Otherwise you may need an op amp with a higher drive capability than shown.
Al.