www.sensirion.com / D1 Version 1 – October 2020 1/16
SHT4x
4th Generation, High-Accuracy, Ultra-Low-Power, 16-bit
Relative Humidity and Temperature Sensor Platform
Features
Relative humidity accuracy: up to ±1.5 %RH
Temperature accuracy: up to ±0.1 °C
Supply voltage: 1.08 V … 3.6 V
Average current: 0.4 µA (at meas. rate 1 Hz)
Idle current: 80 nA
I2C fast mode plus, CRC checksum
Operating range: 0…100 %RH, -40…125 °C
Fully functional in condensing environment
Variable power heater
NIST traceability
JEDEC JESD47 qualification
Mature technology from global market leader
General Description
SHT4x is a digital sensor platform for measuring relative humidity and temperature at different
accuracy classes. The I2C interface provides several preconfigured I2C addresses and maintains
an ultra-low power budget. The power-trimmed internal heater can be used at three heating levels
thus enabling sensor operation in demanding environments. The four-pin dual-flat-no-leads
package is suitable for surface mount technology (SMT) processing.
Device Overview
Functional Block Diagram
Full product list on page 14
Products
Details
SHT40-AD1B
base RH&T accur., 0x44 I2C addr.
SHT40-BD1B
base RH&T accur., 0x45 I2C addr.
SHT41-AD1B
Intermed. RH&T accur., 0x44 I2C addr.
SHT45-AD1B
±1.5 %RH, ±0.1°C accur., 0x44 I2C addr.
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Contents
Features ........................................................................................................................................................................ 1
General Description ................................................................................................................................................... 1
Device Overview ......................................................................................................................................................... 1
Functional Block Diagram ........................................................................................................................................ 1
1 Quick Start – Hello World ..................................................................................................................................... 3
2 Humidity and Temperature Sensor Specifications ....................................................................................... 4
2.1 Relative Humidity ............................................................................................................................................ 4
2.2 Temperature ..................................................................................................................................................... 5
2.3 Recommended Operating Conditions ...................................................................................................... 6
3 Electrical Specifications ........................................................................................................................................ 6
3.1 Electrical Characteristics .............................................................................................................................. 7
3.2 Timings ............................................................................................................................................................... 7
3.3 Absolute Maximum Ratings ......................................................................................................................... 8
4 Sensor Operation .................................................................................................................................................... 8
4.1 I2C communication ......................................................................................................................................... 8
4.2 Data type & length .......................................................................................................................................... 9
4.3 Checksum Calculation ................................................................................................................................... 9
4.4 Command Overview .................................................................................................................................... 10
4.5 Conversion of Signal Output ..................................................................................................................... 10
4.6 Serial number ................................................................................................................................................. 10
4.7 Reset ................................................................................................................................................................. 10
4.8 Heater Operation........................................................................................................................................... 11
5 Physical Specification .......................................................................................................................................... 11
5.1 Package Description .................................................................................................................................... 11
5.2 Package Outline ............................................................................................................................................ 12
5.3 Land Pattern ................................................................................................................................................... 12
5.4 Pin Assignment & Laser Marking ............................................................................................................. 13
5.5 Thermal Information ..................................................................................................................................... 13
6 Quality and Material Contents........................................................................................................................... 13
7 Tape and Reel Packaging .................................................................................................................................. 13
8 Product Name Nomenclature ............................................................................................................................ 14
9 Ordering Information ............................................................................................................................................ 15
10 Bibliography .......................................................................................................................................................... 15
11 Revision History .................................................................................................................................................. 15
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1 Quick Start – Hello World
A typical application circuit for SHT4x is shown on the left-hand side of Figure 1. After reaching
the minimal supply voltage and allowing for the maximal power-up time of 1 ms the sensor is ready
for I2C communication. The quickest way to measure humidity and temperature is pseudo-coded
on the right-hand side of Figure 1. Together with the conversion formulae given in equations ( 1 ),
( 2 ), and ( 3 ), the digital signals can be translated into relative humidity and temperature readings.
Typical application circuit
Figure 1: Typical application circuit (left) and pseudo code (right) for easy starting. For details on
the signal cropping in the last four lines see section 4.5.
Find code resources and embedded drivers on: https://github.com/Sensirion/embedded-
sht/releases
CAD files can be downloaded from SnapEDA: https://www.snapeda.com/parts/SHT40-AD1B-
R3/Sensirion/view-part/
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2 Humidity and Temperature Sensor Specifications
2.1 Relative Humidity
Parameter
Conditions
Value
Units
SHT40 RH accuracy1
typ.
1.8
%RH
max.
see Figure 2
-
SHT41 RH accuracy1
typ.
1.8
%RH
max.
See Figure 3
-
SHT45 RH accuracy1
typ.
1.5
%RH
max.
tbd
-
Repeatability2
high
0.08
%RH
medium
0.15
%RH
low
0.25
%RH
Resolution3
-
0.01
%RH
Hysteresis
-
1
%RH
Specified range4
extended5
0 to 100
%RH
Response time6
t63%
6
s
Long-term drift7
typ.
<0.25
%RH/y
Table 1: General relative humidity sensor specifications.
Figure 2: SHT40 typical and maximal relative
humidity accuracy at 25 °C.
Figure 3: SHT41 typical and maximal relative
humidity accuracy at 25 °C.
1
For definition of typ. and max. accuracy, please refer to the document “Sensirion Humidity Sensor Specification Statement”.
2
The stated repeatability is 3 times the standard deviation (3σ) of multiple consecutive measurement values at constant conditions and is a measure for the noise
on the physical sensor output. Different repeatability commands are listed in Table 7.
3
Resolution of A/D converter.
4
Specified range refers to the range for which the humidity or temperature sensor specification is guaranteed.
5
For details about recommended humidity and temperature operating range, please refer to section 2.3.
6
Time for achieving 63% of a humidity step function, measured at 25°C and 1 m/s airflow. Humidity response time in the application depends on the design-in of the
sensor.
7
Typical value for operation in normal RH/T operating range. Max. value is < 0.5 %RH/y. Value may be higher in environments with vaporized solvents, out-gassing
tapes, adhesives, packaging materials, etc. For more details please refer to Handling Instructions.
±0
±2
±4
±6
±8
010 20 30 40 50 60 70 80 90 100
Relative Humidity (%RH)
SHT40 typ
SHT40 max
DRH (%RH)
±0
±2
±4
±6
±8
010 20 30 40 50 60 70 80 90 100
Relative Humidity (%RH)
SHT41 typ
SHT41 max
DRH (%RH)
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Relative Humidity Accuracy at the Extended Temperature Range
The typical RH accuracy tolerances in the range of T=0°C … 80 °C are given in Figure 6 and
Figure 7.
SHT40 |typ. Delta %RH|
Relative Humidity (%RH)
100
3
90
2
80
70
60
50
1.8
40
30
20
2
10
0
3
0
10
20
30
40
50
60
70
80
Temperature (°C)
SHT41 |typ. Delta %RH|
Relative Humidity (%RH)
100
90
2
80
70
60
50
1.8
40
30
20
10
2
0
0
10
20
30
40
50
60
70
80
Temperature (°C)
Figure 4: Typical RH accuracy tolerance over
humidity and temperature for SHT40.
Figure 5: Typical RH accuracy tolerance over
humidity and temperature for SHT41.
2.2 Temperature
Parameter
Conditions
Value
Units
SHT40 T Accuracy1
typ.
0.2
°C
max.
see Figure 6
-
SHT41 T Accuracy1
typ.
0.2
°C
max.
See Figure 7
-
SHT45 T Accuracy1
typ.
0.1
°C
max.
tbd
-
Repeatability2
high
0.04
°C
medium
0.07
°C
low
0.1
°C
Resolution3
-
0.01
°C
Specified range4
-
–40 to +125
°C
Response time8
t63%
2
s
Long-term drift9
typ.
<0.03
°C/y
Table 2: General temperature sensor specifications.
8
Temperature response time depends on heat conductivity of sensor substrate and design-in of sensor in application.
9
Max. value is < 0.04°C/y.
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Figure 6: SHT40 typical and maximal
temperature accuracy.
Figure 7: SHT41 typical and maximal
temperature accuracy.
2.3 Recommended Operating Conditions
The sensor shows best performance when operated within the recommended normal temperature
and humidity range of 5 °C … 60 °C and 20 %RH … 80 %RH, respectively. Long term exposure to
conditions outside recommended normal range, especially at high relative humidity, may
temporarily offset the RH signal (e.g. +3 %RH after 60 h at > 80 %RH). After returning into the
recommended normal temperature and humidity range the sensor will recover to within
specifications by itself. Prolonged exposure to extreme conditions may accelerate ageing.
To ensure stable operation of the humidity sensor, the conditions described in the document
(Sensirion, 2020) 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 SHT4x.
3 Electrical Specifications
Valid for all electrical specifications: Typical values correspond to VDD = 3.3 V and T = 25 °C. Min.
and max. values are valid in the full temperature range -40 °C … 125 °C and at declared VDD levels.
±0.0
±0.2
±0.4
±0.6
±0.8
±1.0
-40 -20 0 20 40 60 80 100 120
Temperature (°C)
SHT40 typ
SHT40 max
DT (°C)
±0.0
±0.2
±0.4
±0.6
±0.8
±1.0
-40 -20 0 20 40 60 80 100 120
Temperature (°C)
SHT41 typ
SHT41 max
DT (°C)
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3.1 Electrical Characteristics
Parameter
Symb
ol
Conditions
Min
Typ.
Max
Uni
ts
Comments
Supply voltage
VDD
1.08
3.3
3.6
V
-
Power-up/down
level
VPOR
Static power supply
0.6
-
1.08
V
-
Supply current
(no heater)
IDD
Idle state
-
0.08
-
µA
-
Measurement
-
350
-
µA
Average current
consumption while
sensor is measuring
Aver., high repeatability
Aver., med. repeatability
Aver., low repeatability
-
-
-
2.3
1.2
0.4
-
-
-
µA
Aver. current consumpt.
(contin. operation with
one meas. per second)
Power consumpt.
at VDD=1.2V
(no heater)
-
Aver., high repeatability
Aver., med. repeatability
Aver., low repeatability
-
-
-
2.8
1.4
0.5
-
-
-
µW
Aver. power consumpt.
(contin. operation with
one meas. per second)
Low level input
voltage
VIL
-
0
-
0.3*
VDD
V
-
High level input
voltage
VIH
-
0.7*
VDD
-
VDD
V
-
Pull up resistors
Rp
VDD < 1.62 V
820
-
-
Ω
-
VDD ≥ 1.62 V
390
-
-
Ω
-
Low level output
voltage
VOL
VDD < 1.62V,
Rpullup > 820 Ω
-
-
0.2*
VDD
V
-
VDD = 1.62V … 2.0V,
Rpullup > 390 Ω
-
-
0.2*
VDD
V
-
VDD > 2.0V,
Rpullup > 390 Ω
-
-
0.4
V
-
Cap bus load
Cb
RP ≤ 820 Ω: fast mode
-
-
400
pF
Capac. bus load can be
determined from
Cb < trise /(0.8473*Rp).
Rise times are
trise = 300 ns for fast
mode and trise = 120 ns
for fast mode plus
Rp = 390 Ω,
VDD > 1.62 V: fast mode
plus
-
-
340
pF
Table 3: Electrical specifications.
3.2 Timings
Max. values are measured at -40°C and 1.08 V supply voltage (based on characterization).
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Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Comments
Power-up time
tPU
After hard reset,
VDD ≥ VPOR
-
0.3
1
ms
Time between VDD
reaching VPOR and
sensor entering idle
state
Soft reset time
tSR
After soft reset
-
-
1
ms
Time between ACK of
soft reset command and
sensor entering idle
state. Also valid for I2C
general call reset.
Waiting time
tW
between I2C
commands
1
-
-
ms
minimal waiting time for
I2C communication
Measurement
duration
tMEAS,l
Low
repeatability
-
1.3
1.7
ms
The three repeatability
modes differ with
respect to measurement
duration, noise level and
energy consumption
tMEAS,m
Med.
repeatability
-
3.7
4.5
ms
tMEAS,h
High
repeatability
-
6.9
8.2
ms
Heater-on duration
tHeater
Long pulse
0.9
1
1.1
s
After that time the heater
is automatically switched
off
Short pulse
0.09
0.1
0.11
s
After that time the heater
is automatically switched
off
Table 4 System timing specifications.
3.3 Absolute Maximum Ratings
Stress levels beyond those listed in Table 5 may cause permanent damage or affect the reliability
of the device. These are stress ratings only and functional operation of the device at these
conditions is not guaranteed. Ratings are only tested each at a time.
Parameter
Rating
Max. voltage on any pin
VSS - 0.3 V … VDD + 0.3 V
Operating temperature range
-40 °C … 125 °C
Storage temperature range10
-40 °C …150 °C
ESD HBM
2 kV
ESD CDM
500 V
Latch up, JESD78 Class II, 125°C
+-100 mA
Table 5: Absolute maximum ratings.
4 Sensor Operation
4.1 I2C communication
I2C communication is based on NXP’s I2C-bus specification and user manual UM10204, Rev.6, 4
April 2014. Supported I2C modes are standard, fast mode, and fast mode plus. Data is transferred
in multiples of 16-bit words and 8-bit check sum (cyclic redundancy check = CRC). All transfers
must begin with a start condition (S) and terminate with a stop condition (P). To finish a read
transfer, send not acknowledge (NACK) and stop condition (P). Addressing a specific slave device
is done by sending its 7-bit I2C address followed by an eighth bit, denoting the communication
10
The recommended storage temperature range is 10-50°C. Please consult the document “SHTxx Handling Instructions” for more information.
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direction: “zero” indicates transmission to the slave, i.e. “write”, a “one” indicates a “read” request.
Schematics of the I2C transfer types are sketched in Figure 8.
Figure 8: I2C transfer types: First a write header is sent to the I2C slave, followed by a command,
for example “measure RH&T with highest precision”. After the measurement is finished the read
request directed to this I2C slave will be acknowledged and transmission of data will be started by
the slave.
4.2 Data type & length
I2C bus operates with 8-bit data packages. Information from the sensor to the master has a
checksum after every second 8-bit data package.
Humidity and temperature data will always be transmitted in the following way: The first value is
the temperature signal (2 * 8-bit data + 8-bit CRC), the second is the humidity signal (2 * 8-bit data
+ 8-bit CRC).
4.3 Checksum Calculation
For read transfers each 16-bit data is followed by a checksum with the following properties
Property
Value
Name
CRC-8
Message Length
16-bit
Polynomial
0x31 (x8 + x5 + x4 +1)
Initialization
0xFF
Reflect Input/Output
false/false
Final XOR
0x00
Examples
CRC(0xBEEF) = 0x92
Table 6 Data check sum properties.
The master may abort a read transfer after the 16-bit data, if it does not require a checksum.
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4.4 Command Overview
Command
Response
length incl.
CRC (bytes)
Description
bin
hex
1111 1101
FD
6
measure T & RH with high precision (high repeatability)
1111 0110
F6
6
measure T & RH with medium precision (medium repeatability)
1110 0000
E0
6
measure T & RH with lowest precision (low repeatability)
1000 1001
89
6
read serial
1001 0100
94
-
soft reset
0011 1001
39
6
activate highest heater power
& high precis. meas. (typ. 200mW @ 3.3V) for 1s
0011 0010
32
6
activate highest heater power
& high precis. meas. (typ. 200mW @ 3.3V) for 0.1s
0010 1111
2F
6
activate medium heater power
& high precis. meas. (typ. 110mW @ 3.3V) for 1s
0010 0100
24
6
activate medium heater power
& high precis. meas. (typ. 110mW @ 3.3V) for 0.1s
0001 1110
1E
6
activate lowest heater power
& high precis. meas. (typ. 20mW @ 3.3V) for 1s
0001 0101
15
6
activate lowest heater power
& high precis. meas. (typ. 20mW @ 3.3V) for 0.1s
Table 7 Overview of I2C commands.
4.5 Conversion of Signal Output
The digital sensor signals correspond to following humidity and temperature values:
 
 
( 1 )

 
( 2 )

 
( 3 )
N.B.: The RH conversion formula (1) allows values to be reported which are outside of the range
of 0 %RH … 100 %RH. Relative humidity values which are smaller than 0 %RH and larger than
100 %RH are non-physical, however these “uncropped” values might be found beneficial in some
cases (e.g. when the distribution of the sensors at the measurement boundaries are of interest).
For all users who don’t want to engage in evaluation of these non-physical values, cropping of the
RH signal to the range of 0 %RH … 100 %RH is advised.
4.6 Serial number
Each and every single sensor has a unique serial number, that is assigned by Sensirion during
production. It is stored in the one-time-programmable memory and cannot be manipulated after
production. The serial number is accessible via I2C and is transmitted as two 16-bit words, each
followed by an 8-bit CRC.
4.7 Reset
A reset of the sensor can be achieved in three ways:
Soft reset: send the reset command described in Table 7.
I2C general call: all devices on I2C bus are reset by sending the command 0x06 to the I2C
address 0x00.
Power down (incl. pulling SCL and SDA low)
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4.8 Heater Operation
The sensor incorporates an integrated on-chip heater which can be switched on by the set of
commands given in Table 7. There are three different heating powers and two different heating
times accessible to the user. After reception of a heater-on command, the sensor executes the
following procedure:
1. The heater is enabled and the timer starts its count-down
2. On timer expiration a temperature and humidity measurement with the highest repeatability
is started, the heater remains enabled
3. After the measurement is finished the heater is turned off
4. Temperature and humidity values are now available
The maximum on-time of the heater commands is 1 second, in order to prevent overheating of the
sensor by unintended usage of the heater. Thus, there is no dedicated command to turn off the
heater. For extended heating periods it is required to send periodic heater-on commands, keeping
in mind that the heater is designed for a maximal duty cycle of less than 5%. To obtain a fast
increase in temperature the idle time between consecutive heating pulses shall be kept minimal.
Possible Heater Use Cases
There will be dedicated Sensirion application notes elaborating on various use cases of the
heater. In general, the applications of the on-chip heater range around:
1. Removal of condensed / spray water on the sensor surface. Although condensed water is
not a reliability / quality problem to the sensor, it will however make the sensor non-
responsive to RH changes in the air as long as there is liquid water on the surface.
2. Creep-free operation in high humid environments. Periodic heating pulses allow for creep-
free high-humidity measurements for extended times.
Important notes for operating the heater:
1. The heater is designed for a maximum duty cycle of 5%.
2. During operation of the heater, sensor specifications are not valid.
3. The temperature sensor can additionally be affected by the thermally induced mechanical
stress, offsetting the temperature reading from the actual temperature.
4. The sensor’s temperature (base temperature + temperature increase from heater) must
not exceed Tmax = 125 °C in order to have proper electrical functionality of the chip.
If higher heating temperatures are desired, consecutive heating commands have to be sent to the
sensor. The heater shall only be operated in ambient temperatures below 65°C else it could drive
the sensor outside of its maximal operating temperature.
5 Physical Specification
5.1 Package Description
SHT4x is provided in an open-cavity dual flat no lead (DFN) package. The humidity sensor opening
is centered on the top side of the package. The sensor chip is made of silicon, hosted on a copper
lead frame and overmolded by an epoxy-based mold compound. Exposed bottom side of the
leadframe with the metallic contacts is Ni/Pd/Au coated, side walls are bare copper.
Moisture sensitivity level (MSL) of 1 according to IPC/JEDEC J-STD-020 is achieved. It is
recommended to process the sensors within one year after date of delivery.
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5.2 Package Outline
Figure 9 Dimensional drawing of SHT4x including package tolerances (units mm).
5.3 Land Pattern
The land pattern is recommended to be designed according to the used PCB and soldering process
together with the physical outer dimensions of the sensor. For reference, the land pattern used with
Sensirion’s PCBs and soldering processes is given in Figure 10.
Soldering of the central die pad is optional. Sensirion recommends to not solder the central die pad
because the sensor can reach higher temperatures upon heater activation.
Figure 10: Recommended land pattern
(in mm). Details can vary and depend on
used PCBs and solder processes. There
shall be no copper under the sensor
other than at the pin pads.
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5.4 Pin Assignment & Laser Marking
Pin
Name
Comments
1
SDA
Serial data, bidirectional
2
SCL
Serial clock, unidirectional input
3
VDD
Supply voltage
4
VSS
Ground
Figure 11 Pin assignment (transparent top view). Dashed lines are only visible if sensor is viewed
from below. The die pad is not directly connected to any pin.
The laser marking consists of two lines, indicated in Figure 11. In the first line a filled circle serves
as pin-1 indicator and is followed by “SH4”. The last character will indicate the accuracy class of
this product (here “x” serves as place holder). In the second line, the first three characters specify
the product characteristics according to positions 7,8 and 9 of Table 9. The second three
characters serve as internal batch tracking code.
5.5 Thermal Information
Symbol
Description
Heater off, die
pad soldered
(K/W)
Heater on, die
pad soldered
(K/W)
Heater off, die
pad
not soldered
(K/W)
Heater on, die
pad
not soldered
(K/W)

Junction-to-ambient
thermal resistance
246
308
297
357

Junction-to-case
thermal resistance
189
255
191
257

Junction-to-board
thermal resistance
159
225
193
258

Junction-to-board
characterization
param.
159
223
191
254

Junction-to-top
characterization
param.
38
105
44
112
Table 8 Typical values for thermal metrics. In the “heater on” columns a heater power of 200 mW was
assumed. Soldering of the die pad is not recommended, therefore the two right hand side columns are bold.
Values are based on simulation.
6 Quality and Material Contents
Qualification of SHT4x is performed based on the JEDEC JESD47 qualification test method.
Qualification pending. The device is fully RoHS and WEEE compliant, e.g. free of Pb, Cd, and
Hg.
For general remarks of best practice in processing humidity sensor please refer to the handling
instructions (Sensirion, 2020).
7 Tape and Reel Packaging
All specifications for the tape and reel packaging can be found on Figure 12. Reel diameters are
13 inch and 8 inch for the 10k and the 2.5k packaging sizes, respectively.
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Figure 12: Tape and reel specifications including sensor orientation in pocket (see indication of two sensors
on the right side of the tape).
8 Product Name Nomenclature
position
value(s)
explanation
1
S
Sensirion
2
H
Humidity Signal
3
T
Temperature Signal
4
4
Fourth product generation
5
0
1
5
Base accuracy
Intermediate accuracy
Best accuracy
6
-
delimiter
7
A
B
I2C interface with 0x44 address
I2C interface with 0x45 address
8
D
DFN package
9
1
reserved
10
B
blank package without membrane
11
-
delimiter
12
R
Tape on reel packaging
13
2
3
Packaging article contains 2’500 pieces
Packaging article contains 10’000 pieces
Table 9 SHT4x product name nomenclature.
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9 Ordering Information
Material Description
Material Number
Details
Quantity (pcs)
SHT40-AD1B-R2
3.000.465
base RH&T accuracy, 0x44 I2C addr.
2’500
SHT40-AD1B-R3
3.000.353
base RH&T accuracy, 0x44 I2C addr.
10’000
SHT40-BD1B-R2
tbd
base RH&T accuracy, 0x45 I2C addr.
2’500
SHT40-BD1B-R3
tbd
base RH&T accuracy, 0x45 I2C addr.
10’000
SHT41-AD1B-R2
3.000.466
Available 2021
intermed. RH&T accuracy, 0x44 I2C addr.
2’500
SHT41-AD1B-R3
tbd
Available 2021
intermed. RH&T accuracy, 0x44 I2C addr.
10’000
SHT45-AD1B-R2
tbd
Available 2021
±1.5%RH, ±0.1°C acc., 0x44 I2C addr.
2’500
SHT45-AD1B-R3
tbd
Available 2021
±1.5%RH, ±0.1°C acc, 0x44 I2C addr.
10’000
Table 10 SHT4x ordering options.
10 Bibliography
Sensirion. (2020). Handling Instructions for Humidity Sensors. Retrieved from www.sensirion.com
11 Revision History
Date
Version
Page(s)
Changes
October 2020
1
all
Initial release
www.sensirion.com / D1 Version 1 – October 2020 16/16
Important Notices
Warning, Personal Injury
Do not use this product as safety or emergency stop devices or in any other application where failure of the product could result
in personal injury. Do not use this product for applications other than its intended and authorized use. Before installing,
handling, using or servicing this product, please consult the data sheet and application notes. Failure to comply with these
instructions could result in death or serious injury.
If the Buyer shall purchase or use SENSIRION products for any unintended or unauthorized application, Buyer shall defend, indemnify and
hold harmless SENSIRION and its officers, employees, subsidiaries, affiliates and distributors against all claims, costs, damages and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such
unintended or unauthorized use, even if SENSIRION shall be allegedly negligent with respect to the design or the manufacture of the
product.
ESD Precautions
The inherent design of this component causes it to be sensitive to electrostatic discharge (ESD). To prevent ESD-induced damage and/or
degradation, take customary and statutory ESD precautions when handling this product.
See application note “ESD, Latchup and EMC” for more information.
Warranty
SENSIRION warrants solely to the original purchaser of this product for a period of 12 months (one year) from the date of delivery that this
product shall be of the quality, material and workmanship defined in SENSIRION’s published specifications of the product. Within such
period, if proven to be defective, SENSIRION shall repair and/or replace this product, in SENSIRION’s discretion, free of charge to the
Buyer, provided that:
notice in writing describing the defects shall be given to SENSIRION within fourteen (14) days after their appearance;
such defects shall be found, to SENSIRION’s reasonable satisfaction, to have arisen from SENSIRION’s faulty design, material, or
workmanship;
the defective product shall be returned to SENSIRION’s factory at the Buyer’s expense; and
the warranty period for any repaired or replaced product shall be limited to the unexpired portion of the original period.
This warranty does not apply to any equipment which has not been installed and used within the specifications recommended by
SENSIRION for the intended and proper use of the equipment. EXCEPT FOR THE WARRANTIES EXPRESSLY SET FORTH HEREIN,
SENSIRION MAKES NO WARRANTIES, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE PRODUCT. ANY AND ALL
WARRANTIES, INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, ARE EXPRESSLY EXCLUDED AND DECLINED.
SENSIRION is only liable for defects of this product arising under the conditions of operation provided for in the data sheet and proper use
of the goods. SENSIRION explicitly disclaims all warranties, express or implied, for any period during which the goods are operated or
stored not in accordance with the technical specifications.
SENSIRION does not assume any liability arising out of any application or use of any product or circuit and specifically disclaims any and
all liability, including without limitation consequential or incidental damages. All operating parameters, including without limitation
recommended parameters, must be validated for each customer’s applications by customer’s technical experts. Recommended
parameters can and do vary in different applications.
SENSIRION reserves the right, without further notice, (i) to change the product specifications and/or the information in this document and
(ii) to improve reliability, functions and design of this product.
Copyright © 2020, by SENSIRION. CMOSens® is a trademark of Sensirion. All rights reserved
Headquarters and Subsidiaries
Sensirion AG
Laubisruetistr. 50
CH-8712 Staefa ZH
Switzerland
phone: +41 44 306 40 00
fax: +41 44 306 40 30
info@sensirion.com
www.sensirion.com
Sensirion Inc., USA
phone: +1 312 690 5858
info-us@sensirion.com
www.sensirion.com
Sensirion Korea Co. Ltd.
phone: +82 31 337 7700~3
info-kr@sensirion.com
www.sensirion.com/kr
Sensirion Japan Co. Ltd.
phone: +81 3 3444 4940
info-jp@sensirion.com
www.sensirion.com/jp
Sensirion China Co. Ltd.
phone: +86 755 8252 1501
info-cn@sensirion.com
www.sensirion.com/cn
Sensirion Taiwan Co. Ltd
phone: +886 3 5506701
info@sensirion.com
www.sensirion.com
To find your local representative, please visit www.sensirion.com/distributors