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DS18B20+T&R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: | Reel |
Series: | DS18B20 |
Factory Pack Quantity: | 2000 |
Supply Current: | 1.5 mA |
Part # Aliases: | 90-18B20+TRL DS18B20 |
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
.
.
.
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
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