SHT21P SENSIRION, SHT21P Datasheet - Page 2

• Manufacturer Part Number: SHT21P
• Description: SENSOR, HUMIDITY & TEMP
• Manufacturer: SENSIRION

Specifications of SHT21P

• Humidity Range: 0 - 100% RH
• Sensor Output: Analogue - PWM Interface
• Sensor Terminals: SMD
• Response Time: 8s
• Supply Voltage Range: 2.1V To 3.6V
• Accuracy: 2% RH
• Supply Voltage: 3VDC
• Termination: RoHS Compliant
• Capacitance: 0µF
• Rohs Compliant: Yes
• Sensing Accuracy: 2%
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 2 - 1 Year

± 10
Sensor Performance
Relative Humidity
Parameter
Resolution
Accuracy
tolerance
Repeatability
Hysteresis
Nonlinearity
Response time
Operating Range extended
Long Term Drift
Figure 2 Typical and maximal tolerance at 25°C for relative
humidity. For extensive information see Users Guide, Sect. 1.2.
Electrical Specification
Parameter
Supply Voltage, VDD
Supply Current, IDD
Power Dissipation
PWM frequency
Temperature drift of
PWM frequency
Measurement
Frequency
Switch RH/T on SDA SCL up  RH; SCL down  T
Table 1
values see Chapter 3 of Users Guide.
1
Values exclude hysteresis and long term drift and are applicable to non-
condensing environments only.
2
3
reversible offset with slow kinetics (<3%RH after 200hours at 90%RH). For more
details please see Section 1.1 of the Users Guide.
www.sensirion.com
RH (%RH)
± 8
± 6
± 4
± 2
± 0
Time for achieving 63% of a step function, valid at 25°C and 1 m/s airflow.
Accuracies are tested at Outgoing Quality Control at 25°C (77°F) and 3.0V.
Normal operating range: 0-80%RH, beyond this limit sensor may read a
0
1
10
Electrical specification. For absolute maximum
2
20
4
5
Condition
123
5
normal
 63%
30
12 bit
max
typ
Condition
40 °C
40
3
50
min
0
-0.07
min
108
2.1
see Figure 2
60
Relative Humidity (%RH)
< 0.5
2.0
0.1
0.04
<0.1
typ
1
8
0.54
180
120
3.0
typ
70
2
maximal tolerance
typical tolerance
max
100
-0.12 Hz/°C
80
max Units
132
3.6
%RH/yr
90
Units
%RH
%RH
%RH
%RH
%RH
%RH
%RH
Version 1.1 – May 2010
mW
µA
Hz
Hz
s
V
100
Figure 3 Maximal temperature accuracy tolerance
± 3.0
± 2.5
± 2.0
± 1.5
± 1.0
± 0.5
± 0.0
Temperature
Parameter
Resolution
Accuracy
tolerance
Repeatability
Operating Range extended
Response Time
Long Term Drift
Packaging Information
Sensor Type
SHT21P
This datasheet is subject to change and may be amended
without prior notice.
4
tapes, adhesives, packaging materials, etc. For more details please refer to
Handling Instructions.
5
3.0V and T = 25°C.
6
T (°C)
Values of Supply Current and Power Dissipation are based upon fixed VDD =
Response time depends on heat conductivity of sensor substrate.
Value may be higher in environments with vaporized solvents, out-gassing
-40
1
-20
456
6
Tape & Reel
Tape & Reel
Tape & Reel
Packaging
0
Condition
 63%
14 bit
max
typ
20
3
40
maximal tolerance
typical tolerance
min
Quantity
-40
-40
5
1500
5000
400
see Figure 3
60
< 0.04
0.3
0.1
0.01
typ
Temperature (°C)
80
Order Number
1-100711-01
1-100700-01
1-100699-01
max Units
125
257
30
100
°C/yr
°C
°C
°C
°C
°C
°F
s
120
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