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MIN ORDER QUANTITY: 100PCS
195 pcs In STOCK
100 Can Ship Immediately
DALLAS-MAXIM DS18B20
Programmable Resolution 1-Wire Digital Thermometer
FEATURES:
-Unique 1-Wire® Interface Requires Only One
Port Pin for Communication
-Each Device has a Unique 64-Bit Serial Code
Stored in an On-Board ROM
-Multidrop Capability Simplifies Distributed
Temperature-Sensing Applications
-Requires No External Components
-Can Be Powered from Data Line; Power Supply
Range is 3.0V to 5.5V
-Measures Temperatures from -55°C to +125°C
(-67°F to +257°F)
-±0.5°C Accuracy from -10°C to +85°C
-Thermometer Resolution is User Selectable
from 9 to 12 Bits
-Converts Temperature to 12-Bit Digital Word in
750ms (Max)
-User-Definable Nonvolatile (NV) Alarm
Settings
-Alarm Search Command Identifies and
Addresses Devices Whose Temperature is
Outside Programmed Limits (Temperature
Alarm Condition)
-Available in 8-Pin SO (150 mils), 8-Pin μSOP,
and 3-Pin TO-92 Packages
-Software Compatible with the DS1822
-Applications Include Thermostatic Controls,
Industrial Systems, Consumer Products,
Thermometers, or Any Thermally Sensitiv
DESCRIPTION:
The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius 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°C and is accurate to ±0.5°C over the range of -10°C to +85°C. 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 DS18B20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18B20s 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.
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