Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > sci.electronics.design > #433686
| From | Winfield Hill <hill@rowland.harvard.edu> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: noise in instrumentation amplifier |
| Date | 2016-11-03 10:58 -0700 |
| Organization | Rowland Institute |
| Message-ID | <nvftsd0gu4@drn.newsguy.com> (permalink) |
| References | <45614b8824e86ebb44aee5912bcfa0966f41b39e@news.nemoweb.net> <nrdm1cpl82bndljdev6h9oq4nc0lroel8n@4ax.com> <c73e9e30-32a1-467c-9252-44792a10d8c6@googlegroups.com> |
George Herold wrote...
> Spehro Pefhany wrote:
>> On Thu, 03 Nov 16, the renowned val <a@aa> wrote:
>>
>>> I have a basic instrumentation amplifier made with
>>> three MAX 44245 op amps. >My problem is that I have
>>> too much noise in the 50 to 100 kHz bandwidth ...
>>
>> If you look at the datasheet, that op-amp has a strong
>> peak of noise around 40kHz (130nV/rtHz) vs. less than
>> 50nV/rtHz at 1kHz (still pretty noisy). ...
>
> 50 nV/rtHz, Yuck! And they call it a low noise opamp.
Did y'all notice it's an auto-zero amplifier, to get
its 7.5uV Vos max spec? That means it has input
switches running, with charge injection, etc.
--
Thanks,
- Win
Back to sci.electronics.design | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
noise in instrumentation amplifier val <a@aa> - 2016-11-03 12:26 +0000
Re: noise in instrumentation amplifier Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2016-11-03 09:21 -0400
Re: noise in instrumentation amplifier George Herold <gherold@teachspin.com> - 2016-11-03 07:21 -0700
Re: noise in instrumentation amplifier val <a@aa> - 2016-11-03 16:25 +0000
Re: noise in instrumentation amplifier George Herold <gherold@teachspin.com> - 2016-11-03 10:41 -0700
Re: noise in instrumentation amplifier Winfield Hill <hill@rowland.harvard.edu> - 2016-11-03 10:58 -0700
Re: noise in instrumentation amplifier George Herold <gherold@teachspin.com> - 2016-11-03 15:36 -0700
Re: noise in instrumentation amplifier val <a@aa> - 2016-11-04 10:34 +0000
Re: noise in instrumentation amplifier George Herold <gherold@teachspin.com> - 2016-11-04 06:14 -0700
Re: noise in instrumentation amplifier bill.sloman@ieee.org - 2016-11-04 20:39 -0700
Re: noise in instrumentation amplifier val <a@aa> - 2016-11-06 16:16 +0000
Re: noise in instrumentation amplifier Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2016-11-03 21:30 -0400
Re: noise in instrumentation amplifier Kevin Glover <kevinfglover@yahoo.com> - 2016-11-04 10:23 -0700
Re: noise in instrumentation amplifier George Herold <gherold@teachspin.com> - 2016-11-04 10:40 -0700
Re: noise in instrumentation amplifier Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2016-11-04 18:16 -0400
Re: noise in instrumentation amplifier George Herold <gherold@teachspin.com> - 2016-11-04 16:10 -0700
Re: noise in instrumentation amplifier Phil Allison <pallison49@gmail.com> - 2016-11-04 20:43 -0700
Re: noise in instrumentation amplifier val <a@aa> - 2016-11-05 10:54 +0000
Re: noise in instrumentation amplifier Phil Allison <pallison49@gmail.com> - 2016-11-05 05:37 -0700
Re: noise in instrumentation amplifier John S <Sophi.2@invalid.org> - 2016-11-05 09:00 -0500
Re: noise in instrumentation amplifier Phil Allison <pallison49@gmail.com> - 2016-11-05 18:23 -0700
Re: noise in instrumentation amplifier val <a@aa> - 2016-11-06 16:11 +0000
Re: noise in instrumentation amplifier Robert Baer <robertbaer@localnet.com> - 2016-11-07 20:32 -0800
Re: noise in instrumentation amplifier gravpoet <tciacciarelli@gmail.com> - 2016-11-03 06:26 -0700
Re: noise in instrumentation amplifier John Larkin <jjlarkin@highlandtechnology.com> - 2016-11-03 09:08 -0700
csiph-web