HELLO KELLY.............. i fixed him up with caddock....it was very early morning here and when i did see that post i gave him a call off line.................sorry.................tim -----Original Message----- From: William K. Borsum To: PICLIST@MITVMA.MIT.EDU Date: Sunday, November 28, 1999 1:47 PM Subject: Re: [OT] Looking for Decade Voltage Divider Info >At 04:51 AM 11/28/99 -0800, you wrote: >> I'm trying to find data on the Allen-Bradley FN507 decade voltage >>divider. A-B is now part of Rockwell Automation and I can't find anything >>related to their earlier passive components on their web site. >> >> Basically, I'm looking for a precision (+/- 0.01% to 0.1%, low TC) >>divider with a 9M/900K/90K/10K resistor chain for use in my PIC-based DAQ >>system using the LTC2400 24-Bit A/D. I want the divider on a common >>substrate rather than use discretes where the tolerance and TC's would have >>to be matched. I'm open to any other vendor. I've searched the web but I've >>had a hard time tracking down any decade voltage divider package other than >>complete units that are typically found in PMEL labs... Geesh, I should know >>where to find this sort of thing but I'm stuck. So many vendors have >>`changed hats'... Any help would be appreciated. Thanks, > >Last time I needed one similar device, we ended up having Vishay custom >make it out of their bulk metal film precision resistors. Ended up with a >binary divider with 7 taps as I recall--$100 or so each for two, and twelve >week lead time. BUT they were .001% with almost 0 TC in a 14 pin DIP >package. No Free Lunch, I guess. > >When you find your part, do tell us--I may need the same thing shortly. >Kelly > >William K. Borsum, P.E. -- OEM Dataloggers and Instrumentation Systems > & San Diego, California, USA