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Maxim Integrated Semiconductor Electronic Components Datasheet

DS1922T Datasheet

iButton Temperature Loggers

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DS1922L/DS1922T
iButton Temperature Loggers
with 8KB Datalog Memory
General Description
The iButton® temperature loggers (DS1922L/DS1922T)
are rugged, self-sufficient systems that measure tempera-
ture and record the result in a protected memory section.
The recording is done at a user-defined rate. A total of
8192 8-bit readings or 4096 16-bit readings, taken at
equidistant intervals ranging from 1s to 273hr, can be
stored. Additionally, 512 bytes of SRAM store application-
specific information and 64 bytes store calibration data. A
mission to collect data can be programmed to begin
immediately, after a user-defined delay, or after a tempera-
ture alarm. Access to the memory and control functions
can be password protected. The DS1922L/DS1922T are
configured and communicate with a host-computing
device through the serial 1-Wire® protocol, which requires
only a single data lead and a ground return. Each
DS1922L/DS1922T is factory lasered with a guaranteed
unique 64-bit registration number that allows for absolute
traceability. The durable stainless-steel package is highly
resistant to environmental hazards such as dirt, moisture,
and shock. Accessories permit the DS1922L/DS1922T to
be mounted on almost any object, including containers,
pallets, and bags.
Applications
High-Temperature Logging (Process Monitoring,
Industrial Temperature Monitoring)
Temperature Logging in Cold Chain, Food Safety, Bio
Science, and Pharmaceutical and Medical Products
Benefits and Features
High Accuracy, Full-Featured Digital Temperature
Logger Simplifies Temperature Data Collection and
Dissemination of Electronic Temperature Record
Temperature Accuracy of ±0.5°C from -10°C to
+65°C (DS1922L), ±0.5°C from +20°C to +75°C
(DS1922T), with Software Corrections
Measures Temperature with 8-Bit (0.5°C) or 11-Bit
(0.0625°C) Resolution
Operating Temperature Range: DS1922L: -40°C to
+85°C; DS1922T: 0°C to +125°C
Automatically Wakes Up, Measures Temperature,
and Stores Values in 8kB of Data-Log Memory in
8- or 16-Bit Format
Sampling Rate from 1s Up to 273hr
Programmable High and Low Trip Points for
Temperature Alarms
Programmable Recording Start Delay After Elapsed
Time or Upon a Temperature Alarm Trip Point
512 Bytes of General-Purpose Memory Plus
64 Bytes of Calibration Memory
Two-Level Password Protection of All Memory and
Configuration Registers
Individually Calibrated in a NIST-Traceable
Chamber
Complies to Standard EN12830
Rugged Construction Survives Harsh Environments
Water Resistant Enclosure (IP56) or Waterproof if
Placed Inside DS9107 iButton Capsule (Exceeds
Water Resistant 3 ATM Requirements)
CE, FCC, and UL913 Certifications
Simple Serial Port Interfaces to Most Microcontrollers
for Rapid Data Transfer
Communicates to Host with a Single Digital Signal
Up to 15.4kbps at Standard Speed or Up to
125kbps in Overdrive Mode Using 1-Wire Protocol
Quick Access to Alarmed Devices Through 1-Wire
Conditional Search Function
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS1922L-F5#
-40°C to +85°C
F5 Can
DS1922T-F5#
0°C to +125°C
F5 Can
#Denotes a RoHS-compliant device that may include lead(Pb)
that is exempt under the RoHS requirements.
Examples of Accessories
PART
ACCESSORY
DS9096P
DS9101
DS9093RA
DS9093A
DS9092
Self-Stick Adhesive Pad
Multipurpose Clip
Mounting Lock Ring
Snap-in FOB
iButton Probe
Common iButton Device Features and Pin Configuration
appear at end of data sheet.
iButton and 1-Wire are registered trademarks of Maxim
Integrated Products, Inc.
19-4990; Rev 13; 3/15


Maxim Integrated Semiconductor Electronic Components Datasheet

DS1922T Datasheet

iButton Temperature Loggers

No Preview Available !

DS1922L/DS1922T
iButton Temperature Loggers
with 8KB Datalog Memory
Absolute Maximum Ratings
IO Voltage Range to GND ........................................-0.3V to +6V
IO Sink Current....................................................................20mA
Operating Temperature Range
DS1922L ...........................................................-40°C to +85°C
DS1922T ............................................................0°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range*
DS1922L..........................................................-40°C to +85°C*
DS1922T ...........................................................0°C to +125°C*
*Storage or operation above +50°C significantly reduces battery life.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Electrical Characteristics
(VPUP = +3.0V to +5.25V.)
PARAMETER
SYMBOL
CONDITIONS
Operating Temperature
DS1922L (Note 1)
TA
DS1922T (Note 1)
IO PIN: GENERAL DATA
1-Wire Pullup Resistance
Input Capacitance
Input Load Current
High-to-Low Switching Threshold
Input Low Voltage
Low-to-High Switching Threshold
Switching Hysteresis
Output Low Voltage
Recovery Time (Note 2)
RPUP
CIO
IL
VTL
VIL
VTH
VHY
VOL
tREC
(Notes 2, 3)
(Note 4)
IO pin at VPUP
(Notes 5, 6)
(Notes 2, 7)
(Notes 5, 8)
(Note 9)
At 4mA (Note 10)
Standard speed, RPUP = 2.2k
Overdrive speed, RPUP = 2.2k
Overdrive speed, directly prior to reset
pulse; RPUP = 2.2k
Rising-Edge Hold-Off Time
tREH
(Note 11)
Standard speed
Time-Slot Duration (Note 2)
tSLOT
Overdrive speed, VPUP > 4.5V
Overdrive speed (Note 12)
IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE
Reset Low Time (Note 2)
tRSTL
Standard speed, VPUP > 4.5V
Standard speed (Note 12)
Overdrive speed, VPUP > 4.5V
Overdrive speed (Note 12)
Presence-Detect High Time
tPDH
Standard speed, VPUP > 4.5V
Standard speed (Note 12)
Overdrive speed (Note 12)
Presence-Detect Fall Time
(Note 13)
Standard speed, VPUP > 4.5V
tFPD Standard speed
Overdrive speed
MIN TYP MAX UNITS
-40 +85
°C
0 +125
2.2
100 800
6 10
0.4 3.2
0.3
0.7 3.4
0.09 N/A
0.4
5
2
5
0.6 2.0
65
8
9.5
k
pF
μA
V
V
V
V
V
μs
μs
μs
480
690
48
70
15
15
2
1.5
1.5
0.15
720
720
80
80
60
63.5
7
5
8
1
μs
μs
μs
www.maximintegrated.com
Maxim Integrated | 2


Part Number DS1922T
Description iButton Temperature Loggers
Maker Maxim Integrated
Total Page 30 Pages
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