Post by thread:Anybody used MAX111 a/d?

part 0 491 bytes <META content=text/html;charset=iso-8859-1 http-equiv=Content-Type> <META content='"MSHTML 4.72.3110.7"' name=GENERATOR> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT color=#000000 size=2>Has anybody used Maxims MAX111 +-14 bit a/d converter. I am interested in using it for a load cell application. I need 1oz resolution over 10lbs. Any other ideas for interfacing load cells?</FONT></DIV></BODY></HTML> </x-html>

-----Mensagem original----- De: John Miller <spam_OUTsenix2TakeThisOuTTOGETHER.NET> Para: .....PICLISTKILLspam@spam@MITVMA.MIT.EDU <PICLISTKILLspamMITVMA.MIT.EDU> Data: Quarta-feira, Outubro 21, 1998 04:39 Assunto: Anybody used MAX111 a/d? Has anybody used Maxims MAX111 +-14 bit a/d converter. I am interested in using it for a load cell application. I need 1oz resolution over 10lbs. Any other ideas for interfacing load cells? The best one I ever used and still use is AD7714 from Analog Device. Also check AD7730. Both of them 24 bits and no amplification needed. Octavio ======================================================= Octavio Nogueira - .....nogueiraKILLspam.....mandic.com.br ICQ# 19841898 >From the creator of ProPic, ProPic 2 now much better * http://members.tripod.com/ProPic * * PIC Programmer for Windows with down to earth price * =======================================================

part 0 2043 bytes <META content=text/html;charset=iso-8859-1 http-equiv=Content-Type> <META content='"MSHTML 4.72.2106.6"' name=GENERATOR> </HEAD> <BODY bgColor=#ffffff> <DIV><SPAN class=810283522-21101998><FONT color=#0000ff face=Arial size=2>Am I missing something?  Don't you only need about an 8 bit a/d converter to get that resolution?  (16oz * 10lbs. = 160 increments)  You could run it through an instrumentation amp and into a PIC with on board A/D.  Just a suggestion.</FONT></SPAN></DIV> <DIV><SPAN class=810283522-21101998><FONT color=#0000ff face=Arial size=2></FONT></SPAN> </DIV> <DIV><SPAN class=810283522-21101998><FONT color=#0000ff face=Arial size=2>Steve Keller</FONT></SPAN></DIV> <DIV><SPAN class=810283522-21101998><FONT color=#0000ff face=Arial size=2></FONT></SPAN> </DIV> <DIV><SPAN class=810283522-21101998><FONT color=#0000ff face=Arial size=2></FONT></SPAN> </DIV> <BLOCKQUOTE> <DIV class=OutlookMessageHeader><FONT face="Times New Roman" size=2>{Original Message removed}

I've used them. They work for most applicatins. BUT Maxim does not call them low-cost for for no reason. To translate low-cost; make cheaper $$$ by cutting corners, lose performance, resolution, speed, and general funcionality. I had problems with the part losing configuration setup and some other things. It was either in a particular setup and or a resetting PD of the part, can't remember for sure right now. After working with some guy from maxim for weeks we found the problem to be in the max part. Thats when he told me that the 110/111 when cheaper version of of the 194. He went on to explain Low-Cost and what it really meant. It was a leason for me and the design. I have no problems using Max parts if they are right for the job, but I will never use any parts that say Low-Cost. -----Original Message----- From: John Miller <EraseMEsenix2spam_OUTTakeThisOuTTOGETHER.NET> To: PICLISTspam_OUTMITVMA.MIT.EDU <@spam@PICLISTKILLspamMITVMA.MIT.EDU> Date: Wednesday, October 21, 1998 11:41 AM Subject: Anybody used MAX111 a/d? Has anybody used Maxims MAX111 +-14 bit a/d converter. I am interested in using it for a load cell application. I need 1oz resolution over 10lbs. Any other ideas for interfacing load cells?