LM34 to A/D
- From: CptDondo <yan@xxxxxxxxxxxxxxxx>
- Date: Thu, 30 Aug 2007 11:45:25 -0700
OK, I've got a basic problem. I've got an LM34D (32 - 212 deg F) temp sensor <http://www.national.com/ds/LM/LM34.pdf> and I need to connect it to a 0-10V A/D.
To make things more interesting, I am only looking for a relatively narrow range - say from 50 deg. F to 120 deg. F.
I've got 12 bits of A/D, which, in theory, gives me lots of resolution, but the LN34 is only good to about a degree. It outputs 10 mV/degree.
The way I read the LM34 spec, the range I am interested in is about 500mV to 1.2V, so I figure I need to amplify that by, say, 8 to get good use of my A/D accuracy.
I'm mostly a software guy, although once in a while I can solder something without serious injury.
I've been told I need an op-amp to make the above work, but I have no idea how to get an op-amp to work in the above scenario.
Could someone please clue me in? Thanks,
--Yan
.
- Follow-Ups:
- Re: LM34 to A/D
- From: LVMarc
- Re: LM34 to A/D
- From: Genome
- Re: LM34 to A/D
- From: John Larkin
- Re: LM34 to A/D
- Prev by Date: Re: Odd Lots
- Next by Date: Re: Ot: Americans are STUPID (again)
- Previous by thread: [OT]does the nervous system work in parallel?
- Next by thread: Re: LM34 to A/D
- Index(es):
Relevant Pages
|
|
