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參數(shù)資料
| 型號： | DS1923 |
| 英文描述： | Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory |
| 文件頁數(shù)： | 3/52頁 |
| 文件大?。?/td> | 495K |
| 代理商： | DS1923 |
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DS1923: Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory
SYMBOL
CONDITIONS
3 of 52
PARAMETER
IO Pin, 1-Wire Write
MIN
60
TYP
MAX
120
UNITS
Standard speed
Overdrive speed, V
PUP
> 4.5V
(Note 11)
Overdrive speed (Note 11)
Standard speed
Overdrive speed
6
12
Write-0 Low Time
(Note 1)
t
W0L
7.5
5
1
5
1
t
RL
+
t
RL
+
12
15 -
1.95 -
μs
Write-1 Low Time
(Notes 1, 13)
IO Pin, 1-Wire Read
Read Low Time
(Notes 1, 14)
Read Sample Time
(Notes 1, 14)
Real-Time Clock
t
W1L
μs
Standard speed
Overdrive speed
Standard speed
Overdrive speed
15 -
1.95 -
15
1.95
t
RL
μs
t
MSR
μs
Accuracy
+25°C
-3
+3
min./
month
PPM
Frequency Deviation
Temperature Converter
F
-20°C to +85°C
-300
30
240
+60
75
600
8-bit mode (Note 15)
16-bit mode (11 bits)
Conversion Time
t
CONV
ms
Thermal Response
Time Constant
Conversion Error
Without Software
Correction
Conversion Error With
Software Correction
Humidity Converter (Note 30)
Humidity Response
Time Constant
RESP
iButton package (Note 16)
130
s
(Notes 15, 17, 18, 19)
See Temperature
Accuracy Graphs
°C
(Notes 15, 17, 18, 19)
See Temperature
Accuracy Graphs
°C
RH
Slow moving air (Note 20)
30
s
(Note 21)
(Note 22)
With software correction
(Notes 18, 19, 23, 24, 25)
With software correction (Note 18)
(Notes 26, 27)
(Note 28)
At 50%RH (Note 29)
8
12
0.04
12
0.04
100
bits
%RH
%RH
RH Resolution
0.64
0
RH Range
RH Accuracy and
Interchangeability
RH Nonlinearity
RH Hysteresis
RH Repeatability
Long-Term Stability
±5
%RH
<1
0.5
±0.5
<1.0
%RH
%RH
%RH/y
Note 1:
Note 2:
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 found in the DS2480B may be required.
Capacitance on the data pin could be 800pF when V
PUP
is first applied. If a 2.2k 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
, V
TH
are a function of the internal supply voltage.
Voltage below which, during a falling edge on IO, a logic '0' is detected.
The voltage on IO needs to be less 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 has to 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.
Highlighted numbers are NOT in compliance with the published iButton standards. See comparison table below.
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
.
represents the time required for the pullup circuitry to pull the voltage on IO up from V
IL
to V
TH
.
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.
To conserve battery power, use 8-bit temperature logging whenever possible.
http://www.cemagref.fr/English/index.htm Test Report No. E42.
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:
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1923-F5 | Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory |
| DS1990 | Serial Number iButton |
| DS1990A | Serial Number iButton |
| DS1990A-F5 | Serial Number iButton |
| DS1994L-F5 | 4kb Plus Time Memory iButton |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1923_1 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory |
| DS1923_11 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Hygrochron Temperature/Humidity Logger |
| DS1923-F5 | 功能描述:iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1923-F5# | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1923-F5#W | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
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