參數(shù)資料
型號(hào)： DS18S20Z/T&R
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： Switch/Digital Output Temperature Sensor
英文描述： DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 0.50Cel, RECTANGULAR, SURFACE MOUNT
封裝： SOP-8
文件頁(yè)數(shù)： 1/23頁(yè)
文件大?。?/td> 252K
代理商： DS18S20Z/T&R
1 of 23
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
9-Bit Thermometer Resolution
Converts Temperature 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)
Applications Include Thermostatic Controls,
Industrial Systems, Consumer Products,
Thermometers, or Any Thermally Sensitive
System
PIN CONFIGURATIONS
DESCRIPTION
The DS18S20 digital thermometer provides 9-bit Celsius temperature measurements and has an alarm
function with nonvolatile user-programmable upper and lower trigger points. The DS18S20
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 DS18S20 can derive power
directly from the data line (“parasite power”), eliminating the need for an external power supply.
Each DS18S20 has a unique 64-bit serial code, which allows multiple DS18S20s to function on the same
1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18S20s 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.
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
TO-92
(DS18S20)
1
(BOTTOM VIEW)
2
3
MAXIM
DS1820
1
G
ND
DQ
V
DD
2 3
SO (150 mils)
(DS18S20Z)
N.C.
GND
DQ
VDD
N.C.
6
8
7
5
3
1
2
4
D
S
1820
19-5474; Rev 8/10
DS18S20
High-Precision 1-Wire Digital Thermometer
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