DS18B20+的详细信息

Manufacturer: Maxim Integrated
Product Category: Board Mount Temperature Sensors
RoHS: Yes
Output Type: Digital
Configuration: Local
Accuracy: +/- 2 C
Temperature Threshold: Programmable
Digital Output - Bus Interface: 1-Wire
Supply Voltage - Max: 5.5 V
Supply Voltage - Min: 3 V
Maximum Operating Temperature: + 125 C
Minimum Operating Temperature: - 55 C
Shutdown: No Shutdown
Mounting Style: Through Hole
Package / Case: TO-92-3
Device Function: Sensor
Brand: Maxim Integrated
Digital Output - Number of Bits: 12 bit
Packaging: Tube
Series: DS18B20
Factory Pack Quantity: 500
Supply Current: 1.5 mA
Part # Aliases: 90-18B20+000
DS18B20  
Programmable Resolution  
1-Wire Digital Thermometer  
.
.
User-Definable Nonvolatile (NV) Alarm  
Settings  
Alarm Search Command Identifies and  
Addresses Devices Whose Temperature is  
Outside Programmed Limits (Temperature  
Alarm Condition)  
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.  
.
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 Sensitive  
System  
PIN CONFIGURATIONS  
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.  
MAXIM  
18B20  
8
7
N.C.  
N.C.  
VDD  
N.C.  
N.C.  
N.C.  
GND  
1
2
1
2 3  
3
4
6
5
DQ  
SO (150 mils)  
(DS18B20Z)  
FEATURES  
.
.
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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  
VDD  
DQ  
N.C.  
N.C.  
GND  
1
2
8
7
N.C.  
N.C.  
N.C.  
6
5
3
4
1
2 3  
µSOP  
(DS18B20U)  
.
.
(BOTTOM VIEW)  
.
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  
TO-92  
(DS18B20)  
.
.
.
Converts Temperature to 12-Bit Digital Word in  
750ms (Max)  
1-Wire is a registered trademark of Maxim Integrated Products, Inc.  
For pricing, delivery, and ordering information, please contact Maxim Direct  
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.  
REV: 042208