DS18B20+ Dallas Semiconductor, DS18B20+ Datasheet

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DS18B20+

Manufacturer Part Number
DS18B20+
Description
Thermometer; Digital, -55 to 125 C Range, 9-12 Bit Resolution, 1-Wire Out, TO-92
Manufacturer
Dallas Semiconductor
Datasheet

Specifications of DS18B20+

Body Style
TO-92
Brand/series
DS18B20
Function
Thermostat
Output
Current
Primary Type
Thermostat
Range, Measurement
125 °C
Termination
Solder
Voltage, Supply
5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part Electrostatic Device
FEATURES
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.
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.
Unique 1-Wire
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
Thermometer Resolution is User Selectable
from 9 to 12 Bits
Converts Temperature to 12-Bit Digital Word 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)
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
®
Interface Requires Only One
PIN CONFIGURATIONS
(BOTTOM VIEW)
1-Wire Digital Thermometer
(DS18B20)
DALLAS
18B20
1 2 3
1
Programmable Resolution
TO-92
2 3
GND
N.C.
N.C.
N.C.
N.C.
V
DQ
DQ
DD
SO (150 mils)
(DS18B20Z)
1
2
3
4
(DS18B20U)
1
2
3
4
μSOP
DS18B20
8
7
6
5
6
8
7
5
N.C.
N.C.
N.C.
GND
V
N.C.
N.C.
N.C.
DD

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DS18B20+ Summary of contents

Page 1

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 ...

Page 2

... ORDERING INFORMATION PART DS18B20 DS18B20+ DS18B20/T&R DS18B20+T&R DS18B20-SL/T&R DS18B20-SL+T&R DS18B20U DS18B20U+ DS18B20U/T&R DS18B20U+T&R DS18B20Z DS18B20Z+ DS18B20Z/T&R DS18B20Z+T&R +Denotes a lead-free package. A “+” will appear on the top mark of lead-free packages. T&R = Tape and reel. *TO-92 packages in tape and reel can be ordered with straight or formed leads. Choose “SL” for straight leads. Bulk TO-92 orders are straight leads only ...

Page 3

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 ...

Page 4

AC ELECTRICAL CHARACTERISTICS—NV MEMORY PARAMETER NV Write Cycle Time EEPROM Writes EEPROM Data Retention AC ELECTRICAL CHARACTERISTICS PARAMETER Temperature Conversion Time Time to Strong Pullup On Time Slot Recovery Time Write 0 Low Time Write 1 Low Time Read Data ...

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