Introduces the characteristics of DS18B20 digital thermometer, including working temperature range, accuracy, power supply, communication protocol, etc.
The DS18B20 is a 1‑Wire digital temperature sensor that measures Celsius temperatures with selectable resolution from 9 to 12 bits. It operates over a wide temperature range (‑55 °C to +125 °C) and offers ±0.5 °C accuracy between ‑10 °C and +85 °C. Each device contains a unique 64‑bit ROM code, allowing unlimited devices on a single bus.
The sensor can be powered either from the data line (parasite power) or from an external supply (3.0 V to 5.5 V). It is available in TO‑92, µSOP, and SO packages, and includes non‑volatile alarm registers, a configuration register, and CRC protection for data integrity.
| Operating temperature range | -55 °C to +125 °C |
|---|---|
| Accuracy | ±0.5 °C from -10 °C to +85 °C |
| Power supply range | 3.0 V to 5.5 V |
| Resolution | 9‑ to 12‑bit selectable |
| Package options | TO‑92, µSOP (8‑pin), SO (8‑pin) |
| Unique device identifier | 64‑bit ROM code |
The DS18B20 operates from –55 °C up to +125 °C.
It can be powered from the data line (parasite power) or from an external VDD supply between 3.0 V and 5.5 V.
Resolution can be set to 9, 10, 11, or 12 bits, with conversion times ranging from 93.75 ms to 750 ms.
The device is offered in TO‑92, µSOP (8‑pin), and SO (8‑pin) packages.