It's more likely that I should look at my hardware design once more.... C The error behavior you're seeing in the MPX5700 is certainly odd, to say the least; I've seen nothing like that on the MPX4200A- only a gradual change in output scale factor over temperature, mostly at low temperatures. There appears to be almost no zero shift with temperature, less than 10 millivolts. Makes me wonder if the MPX5700 has some sort of design flaw. Dave -- -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body