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REV:
110504
DS1923
Hygrochron Temperature/Humidity Logger
iButton with 8kB Data Log Memory
www.maxim-ic.com
SPECIAL FEATURES
Digital Hygrometer Measures Humidity with 8-Bit
(0.6%RH) or 12-Bit (0.04%RH) Resolution
Operating Range: -20 to +85°C; 0 to 100%RH
(see Safe Operating Range)
Automatically Wakes Up, Measures Temperature
and/or Humidity and Stores Values in 8kB of
Datalog Memory in 8- or 16-Bit Format
Digital Thermometer Measures Temperature with
8-Bit (0.5°C) or 11-Bit (0.0625°C) Resolution
Temperature Accuracy Better than ±0.5°C from
-10°C to +65°C with Software Correction
Built-in Humidity Sensor for Simultaneous
Temperature and Humidity Logging
Capacitive Polymer Humidity-Sensing Element
Hydrophobic Filter Protects Sensor Against Dust,
Dirt, Water, and Contaminants
Sampling Rate from 1s up to 273hrs
Programmable Recording Start Delay After
Elapsed Time or Upon a Temperature Alarm Trip
Point
Programmable High and Low Trip Points for
Temperature and Humidity Alarms
Quick Access to Alarmed Devices Through
1-Wire Conditional Search Function
512 Bytes of General-Purpose Memory Plus 64
Bytes of Calibration Memory
Two-Level Password Protection of All Memory
and Configuration Registers
Communicates to Host with a Single Digital Signal
at Up to 15.4kbps at Standard Speed or Up to
125kbps in Overdrive Mode Using 1-Wire Protocol
Individually Calibrated in a NIST-Traceable
Chamber
Calibration Coefficients for Temperature and
Humidity Factory Programmed into Nonvolatile
(NV) Memory
APPLICATIONS
Temperature and Humidity Logging in Food
Preparation and Processing
Transportation of Temperature- and Humidity-
Sensitive Goods, Industrial Production
Warehouse Monitoring
Environmental Studies/Monitoring
ORDERING INFORMATION
PART
TEMP RANGE
DS1923-F5
-20°C to +85°C
1-Wire and iButton are registered trademarks of Dallas Semiconductor.
Hygrochron is a trademark of Dallas Semiconductor.
PACKAGE
F5 iButton
iButton DESCRIPTION
The DS1923 temperature/humidity logger iButton is a
rugged,
self-sufficient
system
temperature and/or humidity and records 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 273hrs can be stored. In addition to
this, there are 512 bytes of SRAM for storing
application-specific information and 64 bytes for
calibration data. A mission to collect data can be
programmed to begin immediately, or after a user-
defined delay or after a temperature alarm. Access to
the memory and control functions can be password-
protected.
The
DS1923
communicates with a host-computing device through
the serial 1-Wire protocol, which requires only a single
data lead and a ground return. Every DS1923 is
factory-lasered with a guaranteed unique 64-bit
registration
number
that
traceability. The durable stainless-steel package is
highly resistant to environmental hazards such as dirt,
moisture, and shock. Accessories permit the DS1923
to be mounted on almost any object, including
containers, pallets and bags.
F5 MICROCAN
that
measures
is
configured
and
allows
for
absolute
IO
GND
0.51
5.89
16.25
17.35
Front Side Brand
A1
000000FBC52B
1-Wire
Hygrochron
TM
41
Back Side Brand
All dimensions are
shown in millimeters.