40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Thu Aug 10 14:13:23 2017, Kira, Summary, PEM, temperature sensor IMG_20170810_121637~2.jpgIMG_20170810_134422~2.jpg
    Reply  Thu Aug 10 21:22:06 2017, rana, Summary, PEM, temperature sensor tempsensnoise2.pdftempnoise_final.pdf
Message ID: 13188     Entry time: Thu Aug 10 21:22:06 2017     In reply to: 13183
Author: rana 
Type: Summary 
Category: PEM 
Subject: temperature sensor 
  • Should we use the AD590 or the AD592? They're sort of the same, but have slightly different packages and specs.
  • Given the sensitivity of the AD590 to power supply drift, I would recommend using a precision voltage reference like the AD581 or AD587. Take a look at the datasheets and order a few different varieties so we can see what works best for us. I believe that the voltage regulators have too much drift to use for precision temperature control.
  • The AD590 datasheet has a few example circuits showing how we can subtract off the offset which comes the 1 uA/K coefficient of the AD590 (i.e. we would have 295 uA at room temperature, trying to stabilize to +/- 0.1 K)
  • For the first prototypes its fine to use some solderable protoboard assembly, but we will eventually have to figure out how to package this thing and interface it with our Acromag slow controls system.

also, I've attached some temperature noise spectra from the LISA group at the AEI in Hannover. It will be interesting to see if we get the same results.

Attachment 1: tempsensnoise2.pdf  28 kB  Uploaded Thu Aug 10 22:50:13 2017  | Hide | Hide all
Attachment 2: tempnoise_final.pdf  28 kB  Uploaded Thu Aug 10 22:50:13 2017  | Hide | Hide all
ELOG V3.1.3-