Hello all, We are having a hard time finding a suitable microcontroller for our new automotive project. The product will have to operate in a very harsh enviroment including temperatures lower than -40 deg. C. Most microcontroller has -40 deg. C. as the lowest limit. Anyone here knows of microcontrollers that maybe goes to -50 deg. C. ? All architectures are welcome! Best Regards Morten M. J�rgensen
Ultra low temperature microcontroller ?
Started by ●July 12, 2007
Reply by ●July 12, 20072007-07-12
"Morten M J�rgensen" <neax@fake.mail.com> wrote in message news:4695d93b$0$193$edfadb0f@dread11.news.tele.dk...> > Most microcontroller has -40 deg. C. as the lowest limit. Anyone here > knows of microcontrollers that maybe goes to -50 deg. C. ? > > All architectures are welcome! >a microcontroller with a heater?. .... space electronics use microheaters to keep the electronics within a useable working band. Normally by careful layout and appropriate insulation/heatsinking you can redistribute the system hotspots and get the heating for free. All part of the design process I am afraid.
Reply by ●July 12, 20072007-07-12
Morten M J�rgensen wrote:> Hello all, > > We are having a hard time finding a suitable microcontroller for our new > automotive project. The product will have to operate in a very harsh > enviroment including temperatures lower than -40 deg. C. > > Most microcontroller has -40 deg. C. as the lowest limit. Anyone here knows > of microcontrollers that maybe goes to -50 deg. C. ? > > All architectures are welcome! > > Best Regards > > Morten M. J�rgensenatmega32 -55c to +125c just plucked that one out of the box, didn't need to search. see: http://www.atmel.com/dyn/resources/prod_documents/doc2503.pdf under electical characteristics. -- Don McKenzie Site Map: http://www.dontronics.com/sitemap E-Mail Contact Page: http://www.dontronics.com/email No More Damn Spam: http://www.wizard-of-oz.com Serial OLED uses standard micro-SD memory cards. http://www.dontronics-shop.com/product.php?productid=16659 USB Flash Drive interface for existing products. http://www.dontronics-shop.com/product.php?productid=16654
Reply by ●July 12, 20072007-07-12
Morten M J�rgensen wrote:> We are having a hard time finding a suitable microcontroller for our new > automotive project. The product will have to operate in a very harsh > enviroment including temperatures lower than -40 deg. C.Put the microcontoller between the driver's thighs. If it drops below -40 there, nobody's going anywhere.
Reply by ●July 12, 20072007-07-12
> atmega32 -55c to +125cAll chip that respect military temperature range goes from -55�C to +125�C. I think you should be able to find some... -- Guillaume Chevillot
Reply by ●July 12, 20072007-07-12
Since the application is a small footprint temperature sensor I don't think this will do. I think it will be hard to control the influence of the heater !?!? -- Morten "Icky Thwacket" <it@it.it> skrev i en meddelelse news:4695db7c$0$1613$ed2619ec@ptn-nntp-reader02.plus.net...> > "Morten M J�rgensen" <neax@fake.mail.com> wrote in message > news:4695d93b$0$193$edfadb0f@dread11.news.tele.dk... > >> >> Most microcontroller has -40 deg. C. as the lowest limit. Anyone here >> knows of microcontrollers that maybe goes to -50 deg. C. ? >> >> All architectures are welcome! >> > > a microcontroller with a heater?. > > .... space electronics use microheaters to keep the electronics within a > useable working band. Normally by careful layout and appropriate > insulation/heatsinking you can redistribute the system hotspots and get > the heating for free. All part of the design process I am afraid. >
Reply by ●July 12, 20072007-07-12
The operating range states: -40 to 85 deg. C. The absolute maximum ratings states: 55 deg. C. I looking for at controller which includes below -40 within its operational/working range. -- Morten "Don McKenzie" <look@mysig.com> skrev i en meddelelse news:4695e335$0$15142$afc38c87@news.optusnet.com.au...> Morten M J�rgensen wrote: > >> Hello all, >> >> We are having a hard time finding a suitable microcontroller for our new >> automotive project. The product will have to operate in a very harsh >> enviroment including temperatures lower than -40 deg. C. >> >> Most microcontroller has -40 deg. C. as the lowest limit. Anyone here >> knows of microcontrollers that maybe goes to -50 deg. C. ? >> >> All architectures are welcome! >> >> Best Regards >> >> Morten M. J�rgensen > > atmega32 -55c to +125c > > just plucked that one out of the box, didn't need to search. > > see: > http://www.atmel.com/dyn/resources/prod_documents/doc2503.pdf > under electical characteristics. > > > > -- > Don McKenzie > > Site Map: http://www.dontronics.com/sitemap > E-Mail Contact Page: http://www.dontronics.com/email > No More Damn Spam: http://www.wizard-of-oz.com > > Serial OLED uses standard micro-SD memory cards. > http://www.dontronics-shop.com/product.php?productid=16659 > > USB Flash Drive interface for existing products. > http://www.dontronics-shop.com/product.php?productid=16654
Reply by ●July 12, 20072007-07-12
Paul Burke wrote:> Morten M J�rgensen wrote: > >> We are having a hard time finding a suitable microcontroller for our >> new automotive project. The product will have to operate in a very >> harsh enviroment including temperatures lower than -40 deg. C. > > > Put the microcontoller between the driver's thighs. If it drops below > -40 there, nobody's going anywhere.Glad I was not drinking anything when I read that one.... :)) -jg
Reply by ●July 12, 20072007-07-12
In news:4695d93b$0$193$edfadb0f@dread11.news.tele.dk timestamped Thu, 12 Jul 2007 09:33:20 +0200, "Morten M J�rgensen" <neax@fake.mail.com> posted: |---------------------------------------------------------------------------| |"Hello all, | | | |We are having a hard time finding a suitable microcontroller for our new | |automotive project. The product will have to operate in a very harsh | |enviroment including temperatures lower than -40 deg. C. | | | |Most microcontroller has -40 deg. C. as the lowest limit. Anyone here knows| |of microcontrollers that maybe goes to -50 deg. C. ? | | | |All architectures are welcome! | | | |Best Regards | | | |Morten M. J�rgensen" | |---------------------------------------------------------------------------| Hello, A suitable but excessive device would be one designed for use in space, e.g. a field programmable gate array for space from Aeroflex ( HTTP://AMS.Aeroflex.com/ProductFiles/DataSheets/FPGA/RadHardEclipseFPGA.pdf at -55 degrees Celsius compatible with a synthesized 8051 clone which can address gigabytes of memory ( WWW.SiliconLaude.com ). I have found Aeroflex and Silicon Laude to be pleasantly flexible, in contrast in my experience, my point of contact in Honeywell did not make enough of an effort to export components for extreme conditions. If you speak to Aeroflex and Silicon Laude, they may be able to suggest some division other than its astronautical division which might make devices which are suitably cheap for you but still adequate for a low temperature. Regards, Colin Paul Gloster
Reply by ●July 12, 20072007-07-12
On Jul 12, 3:33 am, "Morten M J=F8rgensen" <n...@fake.mail.com> wrote:> > We are having a hard time finding a suitable microcontroller for our new > automotive project. The product will have to operate in a very harsh > enviroment including temperatures lower than -40 deg. C.In addition to the other comments I'd recommend not running your clock close to the highest rated speed, and I'd also have you check on the ratings of supporting components such as capactitors and XTAL oscilators. A/D conversion is likely to be spotty near the temperature extremes also (check the spec sheets carefully - I know that Silabs is one company that specs A/D for the whole temp range but I don't know about the others). I'd design the whole system with at least a 20% margin to hedge my bet. Eric
