SHT71 SENSIRION, SHT71 Datasheet - Page 2

• Manufacturer Part Number: SHT71
• Description: Humidity Sensor
• Manufacturer: SENSIRION

Specifications of SHT71

• Sensing Accuracy: 3%
• Sensor Output: Digital
• Sensor Terminals: Through Hole
• Peak Reflow Compatible (260 C): Yes
• Terminal Type: PCB Surface Mount
• Humidity Range: 0 To 100% RH
• Response Time: 8s
• Humidity Accuracy ±: 3%
• Rohs Compliant: Yes
• Leaded Process Compatible: Yes
• Package / Case: 4-SIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Datasheet SHT7x
Sensor Performance
Relative Humidity
Parameter
Resolution
Accuracy
SHT71
Accuracy
SHT75
Repeatability
Hysteresis
Nonlinearity
Response time
Operating Range
Long term drift
Figure 2: Maximal RH-tolerance at 25°C per sensor type.
Electrical and General Items
Parameter
Source Voltage
Power
Consumption
Communication
Storage
1
2
3
www.sensirion.com
The default measurement resolution of is 14bit for temperature and 12bit for
humidity. It can be reduced to 12/8bit by command to status register.
Accuracies are tested at Outgoing Quality Control at 25°C (77°F) and 3.3V.
Values exclude hysteresis and are only applicable to non-condensing
environments.
Time for reaching 63% of a step function, valid at 25°C and 1 m/s airflow.
± 6
± 4
± 2
± 0
0
2
2
1
10
5
4
3
20
sleep
measuring
average
digital 2-wire interface, see Communication
10 – 50°C (0 – 80°C peak), 20 – 60%RH
Condition
linearized
Condition
raw data
12
tau 63%
normal
max
max
30
typ
typ
Relative Humidity (%RH)
40
SHT71
min
min
2.4
0.4
50
8
0
see Figure 2
see Figure 2
60
< 0.5
3.0
1.8
0.1
0.05
<<1
typ
typ
3.3
1
3
12
90
2
3
8
70
max
0.05
max
100
5.5
12
5
80
SHT75
%RH/yr
Units
%RH
%RH
%RH
%RH
%RH
%RH
%RH
%RH
Units
Version 4.3 – May 2010
90
mW
µW
µW
bit
V
s
100
Temperature
Parameter
Resolution
Accuracy
SHT71
Accuracy
SHT75
Repeatability
Operating Range
Response Time
Long term drift
Figure 3: Maximal T-tolerance per sensor type.
Packaging Information
Sensor Type
SHT71
SHT75
This datasheet is subject to change and may be
amended without prior notice.
4
5
6
Value may be higher in environments with high contents of volatile organic
compounds. See Section 1.3 of Users Guide.
Values for VDD=3.3V at 25°C, average value at one 12bit measurement
per second.
Response time depends on heat capacity of and thermal resistance to
sensor substrate.
± 3.0
± 2.5
± 2.0
± 1.5
± 1.0
± 0.5
± 0.0
-40
2
2
1
45
-20
6
Tape Stripes
Tape Stripes
Packaging
Condition
tau 63%
max
max
typ
typ
0
Temperature (°C)
20
0.04
min
-40
-40
Quantity
12
5
see Figure 3
see Figure 3
50
50
40
< 0.04
0.4
0.3
0.1
0.01
typ
14
SHT75
Order Number
60
1-100092-04
1-100071-04
123.8
254.9
max
0.01
14
30
SHT71
80
Units
°C/yr
°C
°C
°C
°C
°C
°F
2/11
bit
s
100