The document describes the features and characteristics of the DS18S20 Digital Thermometer, including 1-Wire interface, unique 64-bit serial code, multidrop capability, no external components required, power supply from data line, temperature measurement range from -55°C to +125°C, etc.
The Maxim DS18S20 is a high‑precision 1‑Wire digital thermometer that operates from a single data line and can be powered directly from that line (parasite power) or from an external supply of 3.0 V to 5.5 V. It provides 9‑bit resolution (0.5 °C steps) over a temperature range of –55 °C to +125 °C with ±0.5 °C accuracy between –10 °C and +85 °C.
The datasheet details pin assignments, memory map, command set, timing diagrams, and electrical characteristics. It also describes alarm functionality, power‑supply options, and CRC generation for data integrity, making it suitable for HVAC, industrial monitoring, and consumer temperature‑sensing applications.
| Temperature range | -55 °C to +125 °C |
|---|---|
| Resolution | 9‑bit (0.5 °C steps) |
| Accuracy | ±0.5 °C from –10 °C to +85 °C |
| Power supply range | 3.0 V to 5.5 V |
| Conversion time | Maximum 750 ms |
| Parasite power current | up to 1.5 mA during conversion |
The device can be powered from 3.0 V up to 5.5 V, either from the data line (parasite power) or an external supply.
A temperature conversion requires up to 750 ms to complete.
The sensor provides ±0.5 °C accuracy between –10 °C and +85 °C.
Yes, it can operate in parasite‑power mode, drawing power from the 1‑Wire data line.