This datasheet describes the DS1820 single-wire digital thermometer, detailing its features, pinout, temperature measurement process, and communication…
The DS1820 is a single-wire digital thermometer that provides 9-bit temperature readings via a unique one-wire interface. It supports distributed temperature sensing applications in HVAC, buildings, and industrial systems without requiring external components or backup power sources.
The device features a parasitic power option where the data line supplies power during high-level signal periods. It includes non-volatile alarm triggers for high and low temperatures and utilizes a 64-bit laser ROM with an 8-bit CRC for identification and error checking. This manual is written in Chinese.
| Temperature Range | -55°C to +125°C |
|---|---|
| Resolution | 0.5°C (9-bit) |
| Conversion Time | 1 second (typical) |
| Interface Type | Single-wire interface |
No, it can be powered by the data line itself using parasitic power, though an external 5V source is also an option.
It uses a unique 64-bit laser ROM consisting of an 8-bit family code, 48-bit serial number, and 8-bit CRC.