Adafruit 374 DS18B20 digital temperature sensor ±0.5°C 1-Wire

DS18B20 1-Wire temperature sensor

The Adafruit 374 DS18B20 is a digital temperature sensor that communicates over a single-wire bus, so it needs only one digital pin on a microcontroller. Each chip carries a unique 64-bit factory ID, allowing many sensors to share the same pin. It operates from 3.0 V to 5.5 V and covers a usable range of -55 °C to 125 °C.

Makers who need simple multi-point sensing

Engineers who want many temperature nodes with minimal wiring will appreciate the single-pin bus and addressable IDs. Projects that require sub-750 ms query times or a hardware temperature-limit alarm can use the built-in features. Buyers who need analog output, I²C or SPI interfaces, or wider accuracy outside -10 °C to 85 °C should look at other sensor types.

±0.5 °C accuracy from -10 °C to 85 °C

Within this core range the sensor delivers ±0.5 °C accuracy with selectable 9 to 12-bit resolution. Outside the core range the stated tolerance no longer applies, so the specification is the deciding factor for applications that demand tight measurement at room or industrial temperatures.