Goggle is only your friend if you enter the correct search terms it seems. =
Some of the hits I got from yours are not ones I got from mine.... Hopefull=
y some will work out for me. Thanks for that.

As Milosz indicated, there are lots of SPI devices. I need i2c as I'm tryin=
g to integrate a mod into an existing system. I was also trying to keep com=
ponent count down, so did not really want to do the digital pot thing.

Thanks,

Joe


=20
________________________________________
From: piclist-bounces@mit.edu [piclist-bounces@mit.edu] On Behalf Of Jean-P=
aul Louis [louijp@yahoo.com]
Sent: 08 December 2014 15:36
To: Microcontroller discussion list - Public.
Subject: Re: [EE]:: Instrumetation amplifier menagerie

Joe,
Google is your friend. search for =93I2C controlled amplifier=94, and you w=
ill get a large choice

My $0.02,
Jean-Paul
AC9GH


> On Dec 8, 2014, at 9:58 AM, Kardasinski, Milosz <Milosz.Kardasinski@analo=
g.com> wrote:
>
> Most PGA's seem to be SPI. Is there any reason you cannot use an I2C digi=
tal pot in the gain stage of a suitable opamp?
>
> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf =
Of Joe McCauley
> Sent: Monday, December 08, 2014 9:15 AM
> To: Microcontroller discussion list - Public.
> Subject: RE: [EE]:: Instrumetation amplifier menagerie
>
> I don't suppose you have come across any amps where the gain can be set v=
ia I2C interface?
>
> I've been looking for a single supply I2C gain controlled amp last month.=
 I did not find anything suitable before being distracted by something else=
..
>
> Joe
>
> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf =
Of RussellMc
> Sent: 06 December 2014 13:27
> To: Microcontroller discussion list - Public.
> Subject: [EE]:: Instrumetation amplifier menagerie
>
> After a wander through various web sites covering various more and less c=
ommon aspects of instrumentation amplifiers I had the following tabs open (=
plus others related but lee worthy of inclusion).
> May be of interest to some. (All are no doubt known to gargoyle but some =
were accessed via links from links from ... .
>
> Not all are wonderful but there are a few gems.
>
> Potential black hole for some but a fairly specialised one.
>
> YMMV
>
>          Russell
>
>
>
> http://www.analog.com/library/analogDialogue/archives/34-01/haystack/hays=
tack.pdf
> http://www.analog.com/en/power-management/power-monitors/ad8557/products/=
CU_dh_designers_guide_to_instrumentation_amps/fca.html
> http://www.analog.com/static/imported-files/application_notes/AN-244.pdf
> http://www.analog.com/static/imported-files/design_handbooks/581275667431=
2778737Complete_In_Amp.pdf
> http://www.linear.com/products/instrumentation_amplifiers
> http://www.linear.com/product/LT1167
> http://www.ti.com/lit/an/slyt226/slyt226.pdf
> http://www.analog.com/en/amplifier-linear-tools/multisim/topic.html  .
> https://www.google.co.nz/search?q=3Dinstrumentation+amplifier&espv=3D2&bi=
w=3D1807&bih=3D1148&tbm=3Disch&tbo=3Du&source=3Duniv&sa=3DX&ei=3DVMWCVI_rLp=
a48gWJz4LoCw&ved=3D0CCIQsAQ&dpr=3D0.9
> http://www.analog.com/static/imported-files/tech_articles/25406877Common.=
pdf
> http://www.ti.com/lsds/ti/amplifiers-linear/instrumentation-amplifier-pro=
ducts.page
> .
> http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=3D11017&mid=
=3D11&lang=3Den
> .
> http://www.analog.com/static/imported-files/tech_articles/55798267SEN5247=
e.pdf
> .  http://en.wikipedia.org/wiki/Instrumentation_amplifier
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