I don't suppose you have come across any amps where the gain can be set via= 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 com= mon aspects of instrumentation amplifiers I had the following tabs open (pl= us others related but lee worthy of inclusion). May be of interest to some. (All are no doubt known to gargoyle but some we= re 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/haysta= ck.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/58127566743127= 78737Complete_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&biw= =3D1807&bih=3D1148&tbm=3Disch&tbo=3Du&source=3Duniv&sa=3DX&ei=3DVMWCVI_rLpa= 48gWJz4LoCw&ved=3D0CCIQsAQ&dpr=3D0.9 http://www.analog.com/static/imported-files/tech_articles/25406877Common.pd= f http://www.ti.com/lsds/ti/amplifiers-linear/instrumentation-amplifier-produ= cts.page .. http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=3D11017&mid= =3D11&lang=3Den .. http://www.analog.com/static/imported-files/tech_articles/55798267SEN5247e.= pdf .. http://en.wikipedia.org/wiki/Instrumentation_amplifier -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .