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PDF SHT31-DIS Data sheet ( Hoja de datos )
| Número de pieza | SHT31-DIS | |
| Descripción | Humidity and Temperature Sensor | |
| Fabricantes | Sensirion | |
| Logotipo |  |
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Datasheet SHT3x-DIS
Humidity and Temperature Sensor
Fully calibrated, linearized, and temperature
compensated digital output
Wide supply voltage range, from 2.4 V to 5.5 V
I2C Interface with communication speeds up to 1
MHz and two user selectable addresses
Typical accuracy of 1.5 %RH and 0.1 °C for
SHT35
Very fast start-up and measurement time
Tiny 8-Pin DFN package
Product Summary
SHT3x-DIS is the next generation of Sensirion’s
temperature and humidity sensors. It builds on a new
CMOSens® sensor chip that is at the heart of Sensirion’s
new humidity and temperature platform. The SHT3x-DIS
has increased intelligence, reliability and improved
accuracy specifications compared to its predecessor. Its
functionality includes enhanced signal processing, two
distinctive and user selectable I2C addresses and
communication speeds of up to 1 MHz. The DFN
package has a footprint of 2.5 x 2.5 mm2 while keeping
a height of 0.9 mm. This allows for integration of the
SHT3x-DIS into a great variety of applications.
Additionally, the wide supply voltage range of 2.4 V to
5.5 V guarantees compatibility with diverse assembly
situations. All in all, the SHT3x-DIS incorporates 15
years of knowledge of Sensirion, the leader in the
humidity sensor industry.
Benefits of Sensirion’s CMOSens® Technology
High reliability and long-term stability
Industry-proven technology with a track record of
more than 15 years
Designed for mass production
High process capability
High signal-to-noise ratio
RH Sensor T Sensor
nRESET
VDD
ADACDC
Power on
Reset
VSS
Calibration
Memory
Content
1 Sensor Performance.............................................2
2 Specifications .......................................................6
3 Pin Assignment ....................................................8
4 Operation and Communication.............................9
Data processing
& Linearization
Digital Interface
RESET
Alert Logic
ADDR SDA SCL
Alert
5 Packaging...........................................................15
6 Shipping Package ..............................................17
7 Quality ................................................................18
8 Ordering Information...........................................18
Figure 1 Functional block diagram of the SHT3x-DIS. The
sensor signals for humidity and temperature are factory
calibrated, linearized and compensated for temperature
and supply voltage dependencies.
www.sensirion.com
March 2017 - Version 4
1/20
1 page  
Datasheet SHT3x-DIS
Temperature Sensor Performance Graphs
SHT30
DT (°C)
±1.5
maximal tolerance
typical tolerance
±1.0
DT (°C)
±1.5
±1.0
SHT31
maximal tolerance
typical tolerance
±0.5 ±0.5
±0.0
-40 -20 0 20 40 60 80 100 120
Temperature (°C)
±0.0
-40 -20 0 20 40 60 80 100 120
Temperature (°C)
Figure 8 Temperature accuracy of the SHT30 sensor.
Figure 9 Temperature accuracy of the SHT31 sensor.
DT (°C)
±1.5
±1.0
SHT35
maximal tolerance
typical tolerance
±0.5
±0.0
-40 -20 0 20 40 60 80 100 120
Temperature (°C)
Figure 10 Temperature accuracy of the SHT35 sensor.
www.sensirion.com
March 2017 - Version 4
5/20
5 Page 
Datasheet SHT3x-DIS
Condition
Hex. code
Repeatability
mps
MSB
LSB
High 32
Medium
0.5 0x20 24
Low 2F
High 30
Medium
1 0x21 26
Low 2D
High 36
Medium
2 0x22 20
Low 2B
High 34
Medium
4 0x23 22
Low 29
High 37
Medium
10 0x27 21
Low 2A
e.g. 0x2130: 1 high repeatability mps - measurement per
second
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
S I2C Address W Command MSB
Command LSB
I2C write header
16-bit command
Table 9 Measurement commands for periodic data acquisition
mode (Clear blocks are controlled by the microcontroller, grey
blocks by the sensor). N.B.: At the highest mps setting self-
heating of the sensor might occur.
4.6 Readout of Measurement Results for
Periodic Mode
Transmission of the measurement data can be initiated
through the fetch data command shown in Table 10. If
no measurement data is present the I2C read header is
responded with a NACK (Bit 9 in Table 10) and the
communication stops. After the read out command fetch
data has been issued, the data memory is cleared, i.e.
no measurement data is present.
Command
Fetch Data
Hex code
0x E0 00
4.7 ART Command
The ART (accelerated response time) feature can be
activated by issuing the command in Table 11. After
issuing the ART command the sensor will start acquiring
data with a frequency of 4Hz.
The ART command is structurally similar to any other
command in Table 9. Hence section 4.5 applies for
starting a measurement, section 4.6 for reading out data
and section 4.8 for stopping the periodic data acquisition.
The ART feature can also be evaluated using the
Evaluation Kit EK-H5 from Sensirion.
Command
Hex Code
Periodic Measurement with
ART
0x2B32
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
S I2C Address W Command MSB
Command LSB
I2C write header
16-bit command
Table 11 Command for a periodic data acquisition with
the ART feature (Clear blocks are controlled by the
microcontroller, grey blocks by the sensor).
4.8 Break command / Stop Periodic Data
Acquisition Mode
The periodic data acquisition mode can be stopped using
the break command shown in Table 12. It is
recommended to stop the periodic data acquisition prior
to sending another command (except Fetch Data
command) using the break command. Upon reception of
the break command the sensor enters the single shot
mode, after finishing the ongoing measurement. This
can take up to 15 ms, depending on the selected
repeatability.
Command
Break
Hex Code
0x3093
Table 12 Break command (Clear blocks are controlled by
the microcontroller, grey blocks by the sensor).
4.9 Reset
A system reset of the SHT3x-DIS can be generated
externally by issuing a command (soft reset) or by
sending a pulse to the dedicated reset pin (nReset pin).
Additionally, a system reset is generated internally
during power-up. During the reset procedure the sensor
will not process commands.
Table 10 Fetch Data command (Clear blocks are controlled
by the microcontroller, grey blocks by the sensor).
In order to achieve a full reset of the sensor without
removing the power supply, it is recommended to use the
nRESET pin of the SHT3x-DIS.
www.sensirion.com
March 2017 - Version 4
11/20
11 Page | ||
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