SHTC1 Datasheet, PDF (3/14 Pages) List of Unclassifed Manufacturers – Humidity and Temperature Sensor IC

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.
100 ±4.5 ±4 ±4 ±4 ±4 ±4 ±4.5 ±5 ±5
90 ±4.5 ±4 ±3.5 ±3.5 ±3.5 ±3.5 ±4 ±4.5 ±5
80 ±4 ±3.5 ±3 ±3 ±3 ±3.5 ±3.5 ±4 ±4.5
70 ±4 ±3.5 ±3 ±3 ±3 ±3 ±3.5 ±3.5 ±4
60 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3.5 ±3.5
50 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3 ±3.5
40 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3 ±3
30 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3 ±3
20 ±3.5 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3
10 ±4 ±4 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5
0 ±4.5 ±4.5 ±4 ±4 ±4 ±4 ±4 ±4 ±4
0 10 20 30 40 50 60 70 80
Temperature [°C]
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
Supply voltage
Power-up/down level
Supply current
Symbol
VDD
VPOR
IDD
Conditions
Static power supply
Idle state
Measurement
Average
Average power
consumption
-
Low level input voltage VIL
High level input voltage VIH
Low level output voltage VOL
Average
-
-
3 mA sink current
Min Typ. Max Units Comments
1.62 1.8 1.98 V -
1.05 1.2 1.35 V -
-
0.7
2.2 µA -
-
385
465
µA
Average current consumption
while sensor is measuring¹⁰
Average current consumption
-
4.8
-
µA (continuous operation with one
measurement per second)¹⁰
-
8.6
Average power consumption
-
µW (continuous operation with one
measurement per second)¹⁰
-0.5
0.3 VDD V -
0.7 VDD
VDD(max)
+ 0.5
V-
-
- 0.2 VDD - -
Table 3 Electrical specifications.
10 _{These values can be reduced by using the low power measurement mode, see separate application note.}
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