It's been a while since I've picked up a 1-Wire sensor, and I come to find that the venerable DS1820 has been retired. Looks like the current recommended parts are the DS1822 for 2°C accuracy and the DS18B20 for 0.5°C accuracy (the DS18S20 is a drop-in for the original DS1820).

APPLICATION NOTE 4377 - Comparison of the DS18B20 and DS18S20 1-Wire® Digital Thermometers

With all of that, I happen to have the original DS1820 and the newer DS1822 in my parts bin, so I plan to test them both.