Choosing voltage opamp

But that would kill my BW (the BW on that is only 4MHz, and I need

I have broadband light source w/ rapid scann>

OK, I doublechecked the requirements, I don't have to get the exact

Thanks for all advices,

Vitaliy

I was thinking in terms of bandwidth, but yes, the slew rate is relevant also.

You'll almost certainly need a 50 ohm load at 40 MHz speed, so forget my earlier suggestion of using a higher load to reduce the current requirement.

Mark

I found this, it might be just what you need:

Available at Digi-key for 6.36 $US each, or get 100 for $2.82 each. Search on MAX477 at

Mark

Vitaliy wrote: ...

...

You keep mentioning 10V p-p, but if you have a conventional transimpedance amplifier you will get a unipolar signal so you will only get a maximum of 5vp-p (0v to +5V) unless you offset the output or AC couple the output amplifier.

kevin

Thanks, Mark. I've ordered the samples for now to see how it works in reality.

I will get a few samples of > I found this, it might be just what you need:

You're welcome. Good luck. -- Mark

Hi Kevin,

On OPA657 output voltage swing with normal operating conditions (+25C) is +-3.9V.

I think the following opamps have similar specs to MAX477 Mark suggested.

Vitaliy

Kev>