Datasheet

www.sensirion.com Version 2 – December 2011 2/12
Sensor Performance
Temperature Specification
Parameter
Condition
min
typ
max
Units
Resolution
1
14 bit
0.01
°C
12 bit
0.04
°C
Accuracy
tolerance
2
typ
0.2
°C
max
see Figure 2
°C
Repeatability
0.1
°C
Operating Range
extended
-40
125
°C
Response Time
3
63%
5
30
s
Long Term Drift
< 0.04
°C/yr
± 0.0
± 0.5
± 1.0
± 1.5
± 2.0
-40 -20 0 20 40 60 80 100 120
Temperature (°C)
T (°C)
maximal tolerance
typical tolerance
Figure 2 Typical and maximal tolerance for temperature sensor
in °C
1
Default measurement resolution is 14bit. It can be reduced to 13bit, 12bit or
11bit by command to user register.
2
Accuracies are tested at Outgoing Quality Control at 25°C and 3.0V. Values
exclude long term drift.
3
Response time depends on heat conductivity of sensor substrate.
Electrical Specification
Parameter
Conditions
min
typ
max
Units
Supply Voltage, VDD
2.1
3.0
3.6
V
Supply Current, IDD
4
sleep mode
0.15
0.4
µA
measuring
200
300
330
µA
Power Dissipation
4
sleep mode
0.5
1.2
µW
measuring
0.6
0.9
1.0
mW
average 11bit
8.6
µW
Communication
digital 2-wire interface, I
2
C protocol
Table 1 Electrical specification. For absolute maximum
values see Section 4.1 of Users Guide.
Packaging Information
Sensor Type
Packaging
Quantity
Order Number
STS21
Tape & Reel
400
1-100811-01
Tape & Reel
1500
1-100812-01
Tape & Reel
5000
1-100832-01
This datasheet is subject to change and may be amended
without prior notice.
4
Min and max values of Supply Current and Power Dissipation are based on
fixed VDD = 3.0V and T<60°C. The average value is based on one 11bit
measurement per second.