I have to measure an outdoor temperature with a AD590 and a USB-6008 National Instruments DAQ board.
The range that I expected to measure is [263K...313K] in other words [-10C..+40C].
I was thinking to send +5V provided from USB6008 to power AD590 (located at about 5 meters from DAQ board), then use an AI (configured as RSE, in order to minimize ground loop since AD590 is a NRSE source) with a 10k resistor (0,5%), connected from AI+ and GND input, so to have a conversion of 10mV/K.
Is it a good solution?
Then the voltage range should be 2.63V...3.13V.
What do you suggest at this point?
I was thinking a conditioning with an differential amplifier (Av=4.42) so to scale 2.63...3.23V to 0...5V and get a better resolution.
Or you suggest to connect simply the only resistor?
What do you suggest? Any hint/suggestions is really welcomed.