SHTC1 datasheet(3/14 Pages) ETC2

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Version 3 – May 2014

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1.1 RH Accuracy at Various Temperatures

Typical RH accuracy at 25°C is defined in Figure 2. For

other temperatures, typical accuracy has been evaluated

to be as displayed in Figure 4.

Figure 4 Typical accuracy of relative humidity measurements

given in %RH for temperatures 0 – 80°C.

1.2 Recommended Operating Conditions

The sensor shows best performance when operated within

recommended normal temperature and humidity range of

5 – 60 °C and 20 – 80 %RH, respectively. Long term

exposure to conditions outside normal range, especially at

high humidity, may temporarily offset the RH signal (e.g.

+3%RH after 60h at >80%RH). After returning into the

normal temperature and humidity range the sensor will

slowly come back to calibration state by itself. Prolonged

exposure to extreme conditions may accelerate ageing.

To ensure stable operation of the humidity sensor, the

conditions described in the document “SHTxx Assembly of

SMD Packages”, section “Storage and Handling

Instructions” regarding exposure to volatile organic

compounds have to be met. Please note as well that this

does apply not only to transportation and manufacturing,

but also to operation of the SHTC1.

2 Electrical Specifications

2.1 Electrical Characteristics

Default conditions of 25 °C and 1.8 V supply voltage apply to values in the table below, unless otherwise stated.

Parameter

Symbol

Conditions

Min

Typ.

Max

Units Comments

Supply voltage

VDD

1.62

1.8

1.98

Power-up/down level

VPOR

Static power supply

1.05

1.2

1.35

Supply current

IDD

Idle state

0.7

2.2

µA -

Measurement

385

465

µA

Average current consumption

while sensor is measuring10

Average

4.8

µA

Average current consumption

(continuous operation with one

measurement per second)10

Average power

consumption

Average

8.6

µW

Average power consumption

(continuous operation with one

measurement per second)10

Low level input voltage

VIL

-0.5

0.3 VDD

High level input voltage

VIH

0.7 VDD

VDD(max)

+ 0.5

Low level output voltage

VOL

3 mA sink current

0.2 VDD

Table 3 Electrical specifications.

10 These values can be reduced by using the low power measurement mode, see separate application note.

100 ±4.5 ±4

±4

±4 ±4.5 ±5

±5

90 ±4.5 ±4 ±3.5 ±3.5 ±3.5 ±3.5 ±4 ±4.5 ±5

±4 ±3.5 ±3

±3

±3 ±3.5 ±3.5 ±4 ±4.5

±4 ±3.5 ±3

±3

±3 ±3.5 ±3.5 ±4

60 ±3.5 ±3

±3

±3 ±3.5 ±3.5

50 ±3.5 ±3

±3

±3 ±3.5

40 ±3.5 ±3

±3

30 ±3.5 ±3

±3

20 ±3.5 ±3.5 ±3

±3

±4

±4 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5

0 ±4.5 ±4.5 ±4

±4

Temperature [°C]

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