From: "Richard Webb"
Subject: Re: Which OpAmp to use?
Date: Mon, 28 Oct 2002 22:36:34 -0000
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How about a Burr-Brown (TI) OPA642 (slew rate of 380V/us). Great voltage
feedback device, but it might struggle to get near the 4V wanted. I would
suggest the AD8057 but off the top of my head I'm not sure if it could
handle the 50 ohm load. I think that the OPA681 current feedback amp is
certainly worth a look. Can go to 4V with a 5V supply. Slew rate of 2100V/uS
and huge bandwidth. Oh and it supply some decent current, so that 50ohm load
"Jim Thompson" wrote in message
> On Mon, 28 Oct 2002 18:31:06 GMT,
> firstname.lastname@example.org (Bruce Lane),
> In Newsgroup: sci.electronics.design,
> Article: <email@example.com>,
> Entitled: "Re: Which OpAmp to use?",
> Wrote the following:
> |On Mon, 28 Oct 2002 18:00:30 GMT, Jim Thompson
> | wrote:
> |>Takes a slew-rate of more than 250V/us. I'd suggest a discrete
> | I was thinking that might be the case, though the LT chips
> |mentioned by another poster look promising.
> | Whatcha think, Jim? Darlington pair? Single-device
> |common-emitter? Something else?
> | Thanks much.
> I'd make up a simple-minded diff-pair driving a follower with feedback
> setting the gain.
> ...Jim Thompson
> | James E.Thompson, P.E. | mens |
> | Analog Innovations, Inc. | et |
> | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
> | Phoenix, Arizona Voice:(480)460-2350 | |
> | Jim-T@analog_innovations.com Fax:(480)460-2142 | Brass Rat |
> | http://www.analog-innovations.com | 1962 |
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