I'm working on a project where I need to read a K-Type thermocouple at temperatures in the 1100C / 2000 F range.
The software part is straight forward, but the electronics side is new to me.
From what I read the AD595-AQ (http://www.sparkfun.com/datasheets/IC/AD595.pdf) looks to be the tool for the job, but I have a couple of questions before I move forward, or look for a different solution. Since the analog pin only supports 5V I don't see a way to actually accomplishing this as the AD595 exceeds 5V at ~500C. Is there another way of reading this, or a circuit / component that can be used to "recompute" or step the resolution down to a percentage of 5V?
10 bit resolution should be fine since it would still give me 1.25C/2.25F per unit, I just need the entire ~12.5V of the amp across the 10 bits.
The second question depends upon the ability to actually use the 595, and relates to power. In order to get the higher temp readings, it needs to have +15V, and (if I understand the specs) -10 on pin 7 to balance the additional 10V added to pin 11.
How would I go about accomplishing this?
I'm not looking for working solutions, just a nudge in the right direction.
Thanks in advance for any help with this. Rob