www.sensirion.com

Version 2 – December 2011

2/12

Sensor Performance

Temperature Specification

Parameter

Condition

min

typ

max

Units

14 bit

0.01

°C

12 bit

0.04

°C

Accuracy

typ

0.2

°C

max

see Figure 2

°C

Repeatability

0.1

°C

Operating Range extended

-40

125

°C

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

11bit by command to user register.

exclude long term drift.

Electrical Specification

Parameter

Conditions min

typ

max Units

Supply Voltage, VDD

2.1

3.0

3.6

V

sleep mode

0.15

0.4

µA

measuring

200

300

330

µA

sleep mode

0.5

1.2

µW

measuring

0.6

0.9

1.0

mW

average 11bit

8.6

µW

Communication

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.

fixed VDD = 3.0V and T<60°C. The average value is based on one 11bit

measurement per second.