LM35 as a room temperature sensor (any other good alternatives)?

Hey people,
Im doing an diploma project in which I need to make a room temperature sensor? After some hours research I have found LM35. I would like to know:

If LM35 is a good sensor for the mentioned purpose?
Also, whats the importance of the quiescent current in a sensor? From my understand its good to have a low quiescent current sensor to make project power efficient.
Importance of gain in a sensor? From my understand this will make the sensor more accurate by giving large output per variation of degree celcius.
Importance of output impedance in a sensor? Which I don't really know.
Also, is using a digital sensor or analogue sensor better for this application?
As LM35 doesn't use single supply according to datasheet, so what is single supply?
Is there an alternative sensor that could be easy to implement or better accuracy or requires low power?

Hope someone can give me genuine help to understand the mentioned questions.

Thanks.

It has very low resolution.

My home A/C system appears to use simple PN diodes for
the individual room temperature sensors. You can calibrate
them (at a fixed current forcing) in ice water and boiling
water, and fit the voltage line.

Of course there will be noise and repeatability issues of
some scale for any scheme. "Better" accuracy means nothing
if you don't know what's "good enough".

Automotive thermistors are also made cheaply with well
controlled resistance-vs-temperature. Cheap in any junkyard
or from Digi-Key.

Calibrate? What for? Just take a MCP9800 for example. Or DS1820, 18S20.

There are a many good alternatives with frequency, period and duty-cycle outputs:
Manufacturers of Temperature Sensors

Easyrider83 said:

Calibrate? What for? Just take a MCP9800 for example. Or DS1820, 18S20.

Click to expand...

If you have a cheap "mystery diode" you'll need to figure out
its attributes for yourself if you want accuracy.