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参数资料
| 型号： | DS1923-F5# |
| 厂商： | Maxim Integrated |
| 文件页数： | 4/55页 |
| 文件大小： | 0K |
| 描述： | IBUTTON TEMP/HUMIDITY LOGGER F5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| RoHS指令信息： | IButton RoHS Compliance Plan |
| 标准包装： | 5 |
| 系列： | iButton® |
| 存储容量： | 512B |
| 存储器类型： | NVSRAM（非易失 SRAM） |
| 产品目录页面： | 1431 (CN2011-ZH PDF) |
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DS1923
iButton Hygrochron Temperature/Humidity
Logger with 8KB Data-Log Memory
ELECTRICAL CHARACTERISTICS (continued)
(V PUP = +3.0V to +5.25V, T A = -20°C to +85°C.) (Note 31)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RH Accuracy and
Interchangeability
RH Nonlinearity
RH Hysteresis
RH Repeatability
Long-Term Stability
With software correction
(Notes 18, 19, 24, 25, 26)
With software correction (Note 18)
(Notes 27, 28)
(Note 29)
At 50%RH (Note 30)
±5
<1
0.5
±0.5
< 1.0
%RH
%RH
%RH
%RH/
year
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
Note 10:
Note 11:
Note 12:
Note 13:
Note 14:
Note 15:
Note 16:
Note 17:
Note 18:
Note 19:
Note 20:
Note 21:
Note 22:
4
System requirement.
Maximum allowable pullup resistance is a function of the number of 1-Wire devices in the system and 1-Wire recovery
times. The specified value here applies to systems with only one device and with the minimum 1-Wire recovery times. For
more heavily loaded systems, an active pullup such as that in the DS2480B may be required.
Capacitance on the data pin could be 800pF when V PUP is first applied. If a 2.2k Ω resistor is used to pull up the data line,
2.5μs after V PUP has been applied, the parasite capacitance does not affect normal communications.
V TL and V TH are functions of the internal supply voltage, which is a function of V PUP and the 1-Wire recovery times. The
V TH and V TL maximum specifications are valid at V PUP = 5.25V. In any case, V TL < V TH < V PUP .
Voltage below which, during a falling edge on IO, a logic 0 is detected.
The voltage on IO must be less than or equal to V ILMAX whenever the master drives the line low.
Voltage above which, during a rising edge on IO, a logic 1 is detected.
After V TH is crossed during a rising edge on IO, the voltage on IO must drop by V HY to be detected as logic 0.
The I-V characteristic is linear for voltages less than 1V.
The earliest recognition of a negative edge is possible at t REH after V TH has been previously reached.
Numbers in bold are not in compliance with the published iButton device standards. See the Comparison Table.
Interval during the negative edge on IO at the beginning of a presence-detect pulse between the time at which the voltage
is 90% of V PUP and the time at which the voltage is 10% of V PUP .
ε in Figure 13 represents the time required for the pullup circuitry to pull the voltage on IO up from V IL to V TH . The actual
maximum duration for the master to pull the line low is t W1LMAX + t F - ε and t W0LMAX + t F - ε , respectively.
δ in Figure 13 represents the time required for the pullup circuitry to pull the voltage on IO up from V IL to the input high
threshold of the bus master. The actual maximum duration for the master to pull the line low is t RLMAX + t F .
To conserve battery power, use 8-bit temperature logging whenever possible.
This number was derived from a test conducted by Cemagref in Antony, France, in July 2000:
www.cemagref.fr/English/index.htm Test Report No. E42.
For software-corrected accuracy, assume correction using calibration coefficients with calibration equations for error
compensation.
Software correction for humidity and temperature is handled automatically using the 1-Wire Viewer Software package
available at: www.ibutton.com .
Warning: Maxim data-logger products are 100% tested and calibrated at time of manufacture to ensure that they meet all
data sheet parameters, including temperature and/or humidity accuracy. As with any sensor-based product, user shall be
responsible for occasionally rechecking the temperature and/or humidity accuracy of the product to ensure it is still oper-
ating properly. Furthermore, as with all products of this type, when deployed in the field and subjected to handling, harsh
environments, or other hazards/use conditions, there may be some extremely small but nonzero logger failure rate. In
applications where the failure of any logger is a concern, user shall assure that redundant (or other primary) methods of
testing and determining the handling methods, quality, and fitness of the articles and products are implemented to further
mitigate any risk.
All humidity specifications are determined at +25°C except where specifically indicated.
Response time is determined by measuring the 1/e point as the device transitions from 40%RH to 90%RH or 90%RH to
40%RH, whichever is slower. Test was performed at 5L/min airflow.
All DS1923 humidity measurements are 12-bit readings. Missioning determines 8-bit or 16-bit data logging. Battery life-
time is the same no matter what RH resolution is logged.
Maxim Integrated
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| DS1923-F5# | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1923-F5#W | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1923-F5+ | 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
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