DS18S20+

DS18S20+ is a high-precision 1-wire digital thermometer. It provides 9-bit Celsius temperature measurements and has an alarm function with non-volatile user-programmable upper and lower trigger points. The DS18S20 communicates over a 1-wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. In addition, the DS18S20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems. Typical applications include thermostatic controls, industrial systems, consumer products, thermometers, and thermally sensitive systems.

• Unique 1-wire interface requires only one port pin for communication
• Maximize system accuracy in broad range of thermal management applications
• No external components required
• Parasite power mode requires only 2 pins for operation (DQ and GND)
• Simplifies distributed temperature-sensing applications with multidrop capability
• Supply voltage range from 3 to 5.5V at VDD=3.0V to 5.5V, TA=-55°C to +125°C
• Sink current is 4.0mA min at VI/O=0.4V, VDD=3.0V to 5.5V, TA=-55°C to +125°C
• Drift is ±0.2°C typ at VDD=3.0V to 5.5V, TA=-55°C to +125°C
• 3 TO-92 package
• Measures temperatures from -55°C to +125°C

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