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參數(shù)資料
| 型號： | SHT71 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Humidity & Temperature Sensor |
| 中文描述： | 濕度 |
| 文件頁數(shù)： | 2/9頁 |
| 文件大?。?/td> | 840K |
| 代理商： | SHT71 |
SHT1x / SHT7x Relative Humidity & Temperature Sensor System
1 Sensor Performance Specifications
Parameter
Conditions Mn. Typ. Max.
Humidity
Resolution
(2)
Repeatability
Accuracy
(1)
Uncertainty
Interchangeability
raw data
Nonlinearity
linearized
Range
Response time
1/e (63%)
slowly moving air
Hysteresis
Long term stability
typical
Temperature
Resolution
(2)
www.sensirion.com
v2.02 July 2004
2/9
Units
%RH
bit
%RH
0.5 0.03 0.03
8
12
±
0.1
see figure 1
12
linearized
Fully interchangeable
±
3
<<1
0
4
%RH
%RH
%RH
s
100
±
1
< 0.5
%RH
%RH/yr
0.04 0.01 0.01
0.07 0.02 0.02
12
14
±
0.1
±
0.2
see figure 1
-40
-40
5
°C
°F
bit
°C
°F
°C
°F
s
14
Repeatability
Accuracy
Range
123.8
254.9
30
Response Time
1/e (63%)
Table 1
Sensor Performance Specifications
2 Interface Specifications
SHT1x
(slave)
uC
(master)
DATA
SCK
Vdd 2.4 - 5.5V
GND
Vdd
Figure 2
Typical application circuit
2.1 Power Pins
The SHTxx requires a voltage supply between 2.4 and 5.5 V.
After powerup the device needs 11ms to reach its “sleep”
state. No commands should be sent before that time.
Power supply pins (VDD, GND) may be decoupled with a
100 nF capacitor.
2.2 Serial Interface (Bidirectional 2-wire)
The serial interface of the SHTxx is optimized for sensor
readout and power consumption and is not compatible with
I
2
C interfaces, see FAQ for details.
2.2.1 Serial clock input (SCK)
The SCK is used to synchronize the communication between
a microcontroller and the SHTxx. Since the interface
consists of fully static logic there is no minimum SCK
frequency.
2.2.2 Serial data (DATA)
The DATA tristate pin is used to transfer data in and out of
the device. DATA
changes after the falling edge
and is
valid on the rising edge
of the serial clock SCK. During
transmission the DATA line must remain stable while SCK is
high. To avoid signal contention the microcontroller should
only drive DATA low. An external pull-up resistor
(e.g. 10 k
)
is required to pull the signal high. (See Figure 2) Pull-up
resistors are often included in I/O circuits of microcontrollers.
See Table 5 for detailed IO characteristics.
(1)
Each SHTxx is tested to be fully within RH accuracy specifications at 25 °C (77 °F) and 48 °C (118.4 °F)
(2)
The default measurement resolution of 14bit (temperature) and 12bit (humidity) can be reduced to 12 and 8 bit through the status register.
%RH
Relative Humidity absolute accuracy
± 0
± 1
± 2
± 3
± 4
± 5
0
30 40
20
10
80
50
100
70
90
60
Temperature accuracy
0
°C
±1
°C
±2
°C
-40°C
-40°F
0°C
32°F
40°C
104°F
80°C
176°F
120°C
248°F
±3
°C
Dewpoint accuracy @
25
°C (typical)
±0
°C
±1
°C
±2
°C
±3
°C
±4
°C
±5
°C
0
30 40
20
10
80
50
100
70
90
60
0
°F
±1.8
°F
±3.6
°F
±5.4
°F
%RH
±1.8
°F
±3.6
°F
±7.2
°F
±5.4
°F
±9.0
°F
%RH
SHT75
SHT75
SHT11/71
SHT15
SHT11/71
SHT15
SHT11/71
SHT15/75
Figure 1
Rel. Humidity, Temperature and Dewpoint accuracies
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SHT75 | Humidity & Temperature Sensor |
| SI-10022 | SI-10022 |
| SI-16001 | SI-16001 |
| SI-3150C | Plug-In Relay; Contacts:6PST-4NO/2NC; Coil Voltage DC Max:125V; Contact Carry Current:10A; Coil Resistance:6200ohm; Relay Options:Polycarbonage Covers; Relay Mounting:Plug-In; Leaded Process Compatible:No; Mounting Type:Plug In |
| SI3240C | 5-Terminal, Multi-Function, Full-Mold, Low Dropout Voltage Dropper Type |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SHT71 | 制造商:Sensirion 功能描述:SENSOR HUMIDITY PIN VERSION |
| SHT71 | 制造商:Sensirion 功能描述:HUMIDITY SENSOR |
| SHT75 | 制造商:Sensirion 功能描述:HUMIDITY SENSOR 制造商:Sensirion 功能描述:SENSOR HUMIDITY & TEMP V4 制造商:Sensirion 功能描述:SENSOR, HUMIDITY & TEMP, 3.3V 制造商:Sensirion 功能描述:HUMIDITY SENSOR; Humidity Range:0% to 100% RH; Response Time:8s; Humidity Accuracy :1.8%; Leaded Process Compatible:Yes; Package / Case:4-SIP; Peak Reflow Compatible (260 C):Yes; Sensing Accuracy:1.8%; Sensitivity: 1% ;RoHS Compliant: Yes |
| SHT75 | 制造商:Sensirion 功能描述:SENSOR HUMIDITY PIN VERSION |
| SHT75 | 制造商:Sensirion 功能描述:HUMIDITY SENSOR |
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