STS21 datasheet(2/12 Pages) ETC2

2 / 12 page

www.sensirion.com

Version 2 – December 2011

2/12

Sensor Performance

Temperature Specification

Parameter

Condition

min

typ

max

Units

Resolution1

14 bit

0.01

°C

12 bit

0.04

°C

Accuracy

tolerance2

typ

0.2

°C

max

see Figure 2

°C

Repeatability

0.1

°C

Operating Range extended

-40

125

°C

Response Time3

63%

Long Term Drift

< 0.04

°C/yr

± 0.0

± 0.5

± 1.0

± 1.5

± 2.0

-40

-20

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

Supply Current, IDD4

sleep mode

0.15

0.4

µA

measuring

200

300

330

µA

Power Dissipation4

sleep mode

0.5

1.2

µW

measuring

0.6

0.9

1.0

average 11bit

8.6

µW

Communication

digital 2-wire interface, I2C 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.

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