DS18B20

TO-92, -0.5V to +6.0V, 64-bit serial code, 750ms, Digital Thermometer

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Price:: US $0.60~0.85 / piece [Get Latest Price]

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	US $0.60~0.85

PartNumber:: DS18B20

Brand:: Dallas Semiconductor - Maxim | Pack: TO | D/C: 11+

Availability:: Supply Ability: 10000/Week Can Ship Immediately
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Products Upload time: 2011-07-11

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Part Number:DS18B20
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Product Summary

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℃ to +125℃ and is accurate to ±0.5℃ over the range of –10℃ to +85℃. In addition, the DS18B20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply. Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20 to function on the same 1–wire bus; thus, it is simple to use one microprocessor to control many DS18B20 distributed over a large area. 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.

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)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℃ ; (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.