Hi Ryuji,
Please have a look at TMP112...it is specifed at +/-0.5C over the range 0C to 65C. For applications that use a smaller temperature range there is information in the data sheet that allows a user to determine maximum and minimum guaranteed temperature error using a single point of calibration at room temperature.
Please refer to pages 16, 17 and 18 of the TMP112 datasheet for more information on this technique and examples.