Product Summary
The DS18B20 is a Digital Thermometer. It 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. In addition, the DS18B20 can derive power directly from the data line (parasite power), eliminating the need for an external power supply.
Parametrics
DS18B20 absolute maximum ratings: (1)Voltage on Any Pin Relative to Ground: -0.5V to +6.0V; (2)Operating Temperature Range: -55℃ to +125℃; (3)Storage Temperature Range: -55℃ to +125℃; (4)Solder Temperature: See IPC/JEDEC J-STD-020A; (5)Reflow Oven Temperature: +220℃.
Features
DS18B20 features: (1)Unique 1-Wire interface requires only one port pin for communication; (2)Each device has a unique 64-bit serial code stored in an onboard ROM; (3)Multidrop capability simplifies distributed temperature sensing applications; (4)Requires no external components; (5)Can be powered from data line. Power supply range is 3.0V to 5.5V; (6)Measures temperatures from -55℃ to +125℃ (-67°F to +257°F); (7)±0.5℃ accuracy from -10℃ to +85℃; (8)Thermometer resolution is user-selectable from 9 to 12 bits; (9)Converts temperature to 12-bit digital word in 750ms (max.); (10)User-definable nonvolatile (NV) alarm settings; (11)Alarm search command identifies and addresses devices whose temperature is; (12)outside of programmed limits (temperature alarm condition); (13)Available in 8-pin SO (150mil), 8-pin SOP, and 3-pin TO-92 packages; (14)Software compatible with the DS1822; (15)Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system.
Diagrams
Image | Part No | Mfg | Description | Pricing (USD) |
Quantity | |||||||||||||
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DS18B20 |
Maxim Integrated Products |
Board Mount Temperature Sensors |
Data Sheet |
Negotiable |
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DS18B20/T&R |
Maxim Integrated Products |
Board Mount Temperature Sensors |
Data Sheet |
Negotiable |
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DS18B20+ |
Maxim Integrated Products |
Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
Data Sheet |
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DS18B20+PAR |
Maxim Integrated Products |
Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
Data Sheet |
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DS18B20+T&R |
Maxim Integrated Products |
Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
Data Sheet |
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DS18B20-PAR |
Maxim Integrated Products |
Board Mount Temperature Sensors |
Data Sheet |
Negotiable |
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DS18B20-PAR/T&R |
Maxim Integrated Products |
Board Mount Temperature Sensors |
Data Sheet |
Negotiable |
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DS18B20-SL+T&R |
Maxim Integrated Products |
Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
Data Sheet |
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