Hi all,
I just want to share with you how I am using a LM35 C° Temp sensor without using an analog pin.
It's quite simple, but not really the most artistic one.
In my project, I needed 3 K type Thermocouples, therefore I purchased a MCP3424 A-D converter, but as I didn't want to use the MCP9800, I decided to use the 4th channel for my LM35.
Just plug data pin, Gnd on the free channel and power it with 5V.
and, as I 'd already developed the K type MCP3424 conversion, reading the mV from LM35 is a very simple coding and it works perfectly, no need to convert by Vcc *100/1024 etc...
The 4 temp sensors are working very accurately, with very small decimal diff. about 0.02-0.03, the only small restriction is that the LM35 is relatively slow to react, but it doesn't matter in my project.
Hope this could help