The rated accuracy is ±0.5°C over the -10°C to 85°C range, with a wider spread of -0.5°C / +2°C below -10°C. That ±0.5°C figure is the one a calibration tech cares about — it tells you whether this sensor can hold a process temperature within a tight band without a field trim. For a freezer alarm or a server-room monitor, that's plenty. For a precision oven or a medical incubator, you'll want to check whether the -0.5°C / +2°C tail below -10°C matters for your low-end setpoint.
Housed in an 8-uMAX/uSOP package (3.00 mm width, surface-mount), it's a small footprint for dense PCB layouts. The Tape & Reel variant (DS28EA00U+T&R) is what you'd order for automated pick-and-place.