Has anybody used this one? http://www.ti.com/product/lme49990 Sounds too good to be true. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
TI opamp
Started by ●March 10, 2015
Reply by ●March 10, 20152015-03-10
John Larkin <jlarkin@highlandtechnology.com> Wrote in message:> > > Has anybody used this one? > > http://www.ti.com/product/lme49990 > > Sounds too good to be true. > > > -- > > John Larkin Highland Technology, Inc > picosecond timing laser drivers and controllers > > jlarkin att highlandtechnology dott com > http://www.highlandtechnology.com > >I know audiophiles wet their panties over that one...if you do a Google search on it a lot of designs from audio enthusiast sites pop up -- ----Android NewsGroup Reader---- http://usenet.sinaapp.com/
Reply by ●March 10, 20152015-03-10
On Mon, 9 Mar 2015 23:53:25 -0400 (EDT), bitrex <bitrex@de.lete.earthlink.net> wrote:>John Larkin <jlarkin@highlandtechnology.com> Wrote in message: >> >> >> Has anybody used this one? >> >> http://www.ti.com/product/lme49990 >> >> Sounds too good to be true. >> >> >> -- >> >> John Larkin Highland Technology, Inc >> picosecond timing laser drivers and controllers >> >> jlarkin att highlandtechnology dott com >> http://www.highlandtechnology.com >> >> > >I know audiophiles wet their panties over that one...if you do a > Google search on it a lot of designs from audio enthusiast sites > pop upI'd like to get it into my LT Spice circuit, but TI only furnishes Pspice and Tina models, so I'll have to shoehorn one of them into LT Spice. The models are huge. As a shortcut, I could use the UniversalOpamp model and plug in the key specs, but I can't find documentation on that, either. Like, what does the noise parameter 'en' actually do? Or 'enk' ? -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●March 10, 20152015-03-10
On a sunny day (Mon, 09 Mar 2015 20:36:05 -0700) it happened John Larkin <jlarkin@highlandtechnology.com> wrote in <8hpsfapfh93ej3s33qhqqa4ljmqtjrrvb4@4ax.com>:> > >Has anybody used this one? > >http://www.ti.com/product/lme499900.00001% reminds me of audio amp adds of teh late sixties.>Sounds too good to be true.Depends who is listening I suppose. A good audiophile can easily hear 0.000001%.
Reply by ●March 10, 20152015-03-10
On Tuesday, 10 March 2015 14:36:09 UTC+11, John Larkin wrote:> Has anybody used this one? > > http://www.ti.com/product/lme49990 > > Sounds too good to be true.Well the LME suggests that they got it when they took over National Semiconductor, so it might be okay. TI has been known to publish data sheets on the basis that if they get enough interest they'll try to make the part that matches the data sheet. -- Bill Sloman, Sydney
Reply by ●March 10, 20152015-03-10
On 10/03/15 04:53, bitrex wrote:> John Larkin <jlarkin@highlandtechnology.com> Wrote in message: >> >> >> Has anybody used this one? >> >> http://www.ti.com/product/lme49990 >> >> Sounds too good to be true. >> >> >> -- >> >> John Larkin Highland Technology, Inc >> picosecond timing laser drivers and controllers >> >> jlarkin att highlandtechnology dott com >> http://www.highlandtechnology.com >> >> > > I know audiophiles wet their panties over that one...if you do a > Google search on it a lot of designs from audio enthusiast sites > pop up >/Real/ audiophiles don't use opamps !
Reply by ●March 10, 20152015-03-10
On 3/9/2015 10:36 PM, John Larkin wrote:> > > Has anybody used this one? > > http://www.ti.com/product/lme49990 > > Sounds too good to be true.Note that the GBW is 110MHz on page 1 of the specs :) Nice op-amp!
Reply by ●March 10, 20152015-03-10
On Tue, 10 Mar 2015 11:28:27 +0100, David Brown <david.brown@hesbynett.no> wrote:>On 10/03/15 04:53, bitrex wrote: >> John Larkin <jlarkin@highlandtechnology.com> Wrote in message: >>> >>> >>> Has anybody used this one? >>> >>> http://www.ti.com/product/lme49990 >>> >>> Sounds too good to be true. >>> >>> >>> -- >>> >>> John Larkin Highland Technology, Inc >>> picosecond timing laser drivers and controllers >>> >>> jlarkin att highlandtechnology dott com >>> http://www.highlandtechnology.com >>> >>> >> >> I know audiophiles wet their panties over that one...if you do a >> Google search on it a lot of designs from audio enthusiast sites >> pop up >> > >/Real/ audiophiles don't use opamps !/Real/ audiophiles are notorious lunatics. I have a long list somewhere around of idiotic audio terms, like "macrodynamics" and "soundstaging" and "bass speed." This amp looks better than the LT1028. I hope it doesn't have a similar noise peak off the graph. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●March 10, 20152015-03-10
On Tue, 10 Mar 2015 08:44:40 -0500, John S <Sophi.2@invalid.org> wrote:>On 3/9/2015 10:36 PM, John Larkin wrote: >> >> >> Has anybody used this one? >> >> http://www.ti.com/product/lme49990 >> >> Sounds too good to be true. > >Note that the GBW is 110MHz on page 1 of the specs :)Yup. The ADI low-noise amps, still relatively noisy, are slow. The LT1028 is below 1 nv/rthz but has issues.> >Nice op-amp!Sure looks it. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●March 10, 20152015-03-10
On Tuesday, March 10, 2015 at 10:52:37 AM UTC-4, John Larkin wrote:> On Tue, 10 Mar 2015 11:28:27 +0100, David Brown > <david.brown@hesbynett.no> wrote: > > >On 10/03/15 04:53, bitrex wrote: > >> John Larkin <jlarkin@highlandtechnology.com> Wrote in message: > >>> > >>> > >>> Has anybody used this one? > >>> > >>> http://www.ti.com/product/lme49990 > >>> > >>> Sounds too good to be true. > >>> > >>> > >>> -- > >>> > >>> John Larkin Highland Technology, Inc > >>> picosecond timing laser drivers and controllers > >>> > >>> jlarkin att highlandtechnology dott com > >>> http://www.highlandtechnology.com > >>> > >>> > >> > >> I know audiophiles wet their panties over that one...if you do a > >> Google search on it a lot of designs from audio enthusiast sites > >> pop up > >> > > > >/Real/ audiophiles don't use opamps ! > > /Real/ audiophiles are notorious lunatics. I have a long list > somewhere around of idiotic audio terms, like "macrodynamics" and > "soundstaging" and "bass speed." > > This amp looks better than the LT1028. I hope it doesn't have a > similar noise peak off the graph.Nice opamp..Thanks, well lotsa current noise, and the slew rate is a bit slow for a 100MHz GBW. Too bad they don't show the noise plots out past 100kHz. (Maybe someone will measure it?) George H.> > > > -- > > John Larkin Highland Technology, Inc > picosecond timing laser drivers and controllers > > jlarkin att highlandtechnology dott com > http://www.highlandtechnology.com
