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(ISO9001-2008) Maxim/Dallas DS18b20 sensor
DS18B20 DIGITAL SENSOR :
Unique 1-Wire interface requires only one port pin for communication.
. Multidrop capability simplifies distributed temperature sensing applications.
. Require no external components.
. Can be powered from data line.
Power supply range is 3.0 V to 5.5 V.
. Zero standby power required .
. Measures temperatures from -55C to
+125C. Fahrenheit equivalent is -67F to
+257F.
. 0.5C accuracy from -10C to +85C.
. Thermometer resolution is programmable from 9 to 12 bits .
. Converts 12-bit temperature to digital word in
750 MS (max) .
. User-definable, nonvolatile temperature alarm settings DS18B20.
. Alarm search command identifies and 8-Pin SOIC (150 mil)
addresses devices whose temperature is
outside of programmed limits (temperature PIN DESCRIPTION
alarm condition) .
. Applications include thermostatic controls, DQ - Data In/Out
industrial systems, consumer products, VDD - Power Supply Voltage
thermometers, or any thermally sensitive NC - No Connect
system
The DS18B20 Digital Thermometer provides 9 to 12-bit (configurable) temperature readings which indicate the temperature of the device. Information is sent to/from the DS18B20 over a 1-Wire interface, so that only one wire (and ground)needs to be connected from a central microprocessor to DS18B20. Power for reading, writing, and performing temperature conversions can be derived from the data line itself with no need for an external power source.
Because each DS18B20 contains a unique silicon serial number, multiple DS18B20s can exist on the same 1-Wire bus. This allows for placing temperature sensors in many different places. Applications where this feature is useful include HVAC environmental controls, sensing temperature inside buildings, equipment or machinery and process monitoring and control.
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