The DS18B20 Digital Thermometer provides 9 to 12–bit centigrade temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of –55°C to +125°Cand is accurate to 0.5 C over the range of –10°C to +85°C. In addition, the DS18B20 can derive powerdirectly from the data line (“parasite power”), eliminating the need for an external power supply.

該DS18B20的數(shù)字溫度計(jì)提供9至12位的攝氏溫度測(cè)量，并具有與非易失性用戶可編程上限和下限報(bào)警功能。信息單線接口送入 DS1820 或從 DS1820 送出，因此按照定義只需要一條數(shù)據(jù)線（和地線）與中央微處理器進(jìn)行通信。它的測(cè)溫范圍從-55 ° C到 +125 ° C，其中從-10 ° C至+85 ° C可以精確到0.5° C 。此外，DS18B20可以從數(shù)據(jù)線直接供電（“寄生電源”），從而消除了供應(yīng)需要一個(gè)外部電源。