I am trying to find a list of temperature meter ics. After this I will check their features and I will choose the best for my applycation.
Can you help me?
Thanks for your time.
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I don't matter if there is an inaccuracy of +/-1 or 2 C degrees nor the comunication with a micro way.
The features that it must support is very low consumption and operating voltage. And also low cost per 10K+ pcs.
I used earlier in my projects some DALLAS SEMI ICs and LM75s. The LM75 seemed to be very inaccurate. DALLAS ICs are fine, but when I was searching components for my current design, I found the TMP121 AIDBVTG4 from TEXAS INSTRUMENTS. It is relatively cheap and very easy to use. Just send a clock end capture the 13 bits coming out.
1 sign bit + 12 temperature bits. 0.0625 °C resolution with a +- 1.5 °C error over the -40 - +120°C Operating range.
I think this is a very useful device.
One thing I learned after my first prototype: The device's die is connected to the GND pin / N.C pin depending on the type (TMP121 / TMP123 respectively), so You should take care with the PCB design to avoid connecting it directly to a big ground plane shared with other components.
It worth a try to look around on the TEXAS INSTRUMENTS's pages, there are more accurate sensors as well, and of course with other protocols too.
TMP121 is SPI compatible. (But does not use the MOSI line).
I hope thhis will help You!
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