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DS18B204温度传感器手册

更新时间：2019-12-30 16:05:55 大小：396K 上传用户：ffx12查看TA发布的资源 标签：ds18b204温度传感器 下载积分：2分 评价赚积分 （如何评价?） 打赏 收藏 评论(1) 举报

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DS18B204温度传感器介绍手册，介绍了DS18B204的使用

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DS18B204温度传感器.pdf 396K

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DS18B20  
Programmable Resolution  
1-Wire Digital Thermometer  
General Description  
Benefits and Features  
● Unique 1-Wire Interface Requires Only One Port  
®
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 micro-  
processor. In addition, the DS18B20 can derive power  
directly from the data line (“parasite power”), eliminating  
the need for an external power supply.  
Pin for Communication  
● Reduce Component Count with Integrated  
Temperature Sensor and EEPROM  
• Measures Temperatures from -55°C to +125°C  
(-67°F to +257°F)  
• ±0.5°C Accuracy from -10°C to +85°C  
• Programmable Resolution from 9 Bits to 12 Bits  
• No External Components Required  
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.  
● Parasitic Power Mode Requires Only 2 Pins for  
Operation (DQ and GND)  
● Simplifies Distributed Temperature-Sensing  
Applications with Multidrop Capability  
• Each Device Has a Unique 64-Bit Serial Code  
Stored in On-Board ROM  
● Flexible User-Definable Nonvolatile (NV) Alarm Settings  
with Alarm Search Command Identifies Devices with  
Temperatures Outside Programmed Limits  
Applications  
● Thermostatic Controls  
● Available in 8-Pin SO (150 mils), 8-Pin µSOP, and  
● Industrial Systems  
3-Pin TO-92 Packages  
● Consumer Products  
● Thermometers  
● Thermally Sensitive Systems  
Pin Configurations  
TOP VIEW  
+
N.C.  
N.C.  
VDD  
1
2
3
4
8
7
6
5
N.C.  
N.C.  
N.C.  
GND  
DS18B20  
DS18B20  
1
2
3
DQ  
SO (150 mils)  
(DS18B20Z)  
DQ  
N.C.  
N.C.  
GND  
+
VDD  
1
2
3
4
8
7
6
5
GND DQ VDD  
N.C.  
N.C.  
N.C.  
DS18B20  
1
2
3
µSOP  
(DS18B20U)  
1
BOTTOM VIEW  
appears at end of data sheet.  
TO-92  
(DS18B20)  
1-Wire is a registered trademark of Maxim Integrated Products, Inc.  
19-7487; Rev 4; 1/15  
DS18B20  
Programmable Resolution  
1-Wire Digital Thermometer  
Absolute Maximum Ratings  
Voltage Range on Any Pin Relative to Ground....-0.5V to +6.0V  
Operating Temperature Range......................... -55°C to +125°C  
Storage Temperature Range............................ -55°C to +125°C  
Solder Temperature...............................Refer to the IPC/JEDEC  
J-STD-020 Specification.  
These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure  
to absolute maximum rating conditions for extended periods of time may affect reliability.  
DC Electrical Characteristics  
(-55°C to +125°C; V  
= 3.0V to 5.5V)  
DD  
PARAMETER  
Supply Voltage  
SYMBOL  
CONDITIONS  
Local power (Note 1)  
MIN  
+3.0  
+3.0  
+3.0  
TYP  
MAX  
+5.5  
+5.5  
UNITS  
V
V
DD  
Parasite power  
Local power  
Pullup Supply Voltage  
V
(Notes 1, 2)  
(Note 3)  
V
PU  
V
DD  
-10°C to +85°C  
-55°C to +125°C  
(Notes 1, 4, 5)  
±0.5  
±2  
Thermometer Error  
Input Logic-Low  
t
°C  
V
ERR  
V
-0.3  
+0.8  
IL  
IH  
L
The lower  
of 5.5 or  
Local power  
+2.2  
Input Logic-High  
V
I
(Notes 1,6)  
V
Parasite power  
+3.0  
4.0  
V
+ 0.3  
DD  
Sink Current  
Standby Current  
Active Current  
DQ Input Current  
Drift  
V
= 0.4V  
mA  
nA  
mA  
µA  
°C  
I/O  
I
(Notes 7, 8)  
V = 5V (Note 9)  
DD  
750  
1
1000  
1.5  
DDS  
I
DD  
DQ  
I
(Note 10)  
(Note 11)  
5
±0.2  
Note 1: All voltages are referenced to ground.  
Note 2: The Pullup Supply Voltage specification assumes that the pullup device is ideal, and therefore the high level of the  
pullup is equal to V . In order to meet the V spec of the DS18B20, the actual supply rail for the strong pullup transis-  
PU  
IH  
tor must include margin for the voltage drop across the transistor when it is turned on; thus: V  
= V  
+
PU_ACTUAL  
PU_IDEAL  
V
.
TRANSISTOR  
Note 3: See typical performance curve in .  
Note 4: Logic-low voltages are specified at a sink current of 4mA.  
Note 5: To guarantee a presence pulse under low voltage parasite power conditions, V  
0.5V.  
may have to be reduced to as low as  
ILMAX  
Note 6: Logic-high voltages are specified at a source current of 1mA.  
Note 7: Standby current specified up to +70°C. Standby current typically is 3µA at +125°C.  
Note 8: To minimize I , DQ should be within the following ranges: GND ≤ DQ ≤ GND + 0.3V or V  
– 0.3V ≤ DQ ≤ V .  
DD  
DDS  
DD  
Note 9: Active current refers to supply current during active temperature conversions or EEPROM writes.  
Note 10: DQ line is high (“high-Z” state).  
Note 11: Drift data is based on a 1000-hour stress test at +125°C with V  
= 5.5V.  
DD  
Maxim Integrated  
│ 2  
 

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