a modulated supply source

Hi Ahmad,

I think you forgot to attach your proposed circuit... Depending on your bandwidth requirement the BUF634 could be worth a look. You can't get the same current out of it as the OPA541 but you get an bandwidth of 30MHz to 180MHz indead of 55kHz.

Thomas

Thomas:

Thank you for the time, responding to my post.

Looks like there has been an issue with uploading the schematic related to my question.

One of the folks at TI is trying to resolve the issue, and hopefully you will be able to see my schematic that I could not attach.

I try to attach it to this email/post one more time, please recheck to find out if you can see it.

Regards,

-Ahmad

Hi Ahmad,

It looks like you have copied the circuit shown in Figure 5 of the datasheet and changed the gain. So your circuit looks good to me.

With 2A you are still in the "Safe Operating Area" of the device (shown in Figure 1), but you migh think about reducing the supply voltage: You still have a lot of room to meet the Input Common-Mode Voltage requirement of 6V to the rail. Reducing the supply voltage will reduce the internal Pd and reduce self heating of the IC. A +/-12V supply could be a nice option (if availible). Make sure that the heat has some place to go!

Did you have any specific concerns when you posted this circuit?

Thomas 

Thomas:

You answerd my question(s) and concern.

I wanted to double check to make sure this was going to work.

Thanks,

-Ahmad

Ahmad;

I suggest that you download TI's free software "TINA-TI". You can use it to draw a circuit and then run an analysis to see if it works as you think it should.

Neil:

Thank you so much for the response, so good to hear from you.

I had to pleasure to work with you many times back at Burr-Brown and then TI.

Regards,

-Ahmad