Data Sheet SHTW2
WLCSP Humidity and Temperature Sensor IC
Ultra-small flip chip package: 1.3 × 0.7 × 0.5 mm3
Fully calibrated and reflow solderable
Ultra-low power consumption
Power-up and measurement within 1 ms
1.8 V supply voltage
Typical accuracy: ±3 %RH and ±0.3 °C
The SHTW2 is a digital humidity and temperature sensor The sensor covers a humidity measurement range of 0 to
in a flip chip package. This type of package opens up a 100 %RH and a temperature measurement range of -30
new category of ultra-small humidity sensors which are to 100 °C with a typical accuracy of ±3 %RH and ±0.3°C.
suitable for applications with the tightest space The operation voltage of 1.8 V and the low power
constraints. At the same time, the flip chip package consumption make the SHTW2 suitable for mobile or
impresses with its pure simplicity. wireless applications running on the tightest power
The sensor is based on Sensirion’s CMOSens® budgets. With the industry-proven quality and reliability of
technology, which offers a complete sensor system on a Sensirion’s humidity and temperature sensors and
single chip, consisting of a capacitive humidity sensor, a constant accuracy over a large measurement range, the
bandgap temperature sensor, analog and digital signal SHTW2 offers an unprecedented performance-to-price
processing, A/D converter, calibration data memory, and ratio. Tape and reel packaging together with suitability for
a digital communication interface supporting I2C fast standard SMD assembly processes make the SHTW2
mode. predestined for high-volume applications.
Benefits of Sensirion’s CMOSens® Technology Block diagram
High reliability and long-term stability
Industry-proven technology with a track record of RH sensor T sensor
more than 10 years
Designed for mass production Signal conditioning Signal conditioning
Optimized for lowest cost
Best signal-to-noise ratio
Contents of this Data Sheet digital
1 Humidity and Temperature Sensor Specifications ... 2 Data processing and system control
2 Electrical Specifications ........................................... 3
3 Timing Specifications ............................................... 4 Calibration mem. I2C interface
4 Interface Specifications ............................................ 5
5 Operation and Communication ................................ 6 VDD VSS SDA SCL
6 Quality...................................................................... 9
7 Package and Traceability......................................... 9 Figure 1 Functional block diagram of the SHTW2.
8 Technical Drawings................................................ 10
9 Further Information ................................................ 12
Important Notices............................................................ 14
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1 Humidity and Temperature Sensor Specifications
Relative Humidity Temperature
Parameter Conditions Value Units Parameter Conditions Value Units
Accuracy tolerance1 Typ. 3.0 %RH Accuracy tolerance1 Typ. 0.3 °C
Max. see Figure 2 %RH Max. see Figure 3 °C
Repeatability2 - 0.1 %RH Repeatability2 - 0.1 °C
Resolution3 - 0.01 %RH Resolution3 - 0.01 °C
Hysteresis - 1 %RH Specified range4 - –30 to +100 °C
Specified range4 extended5 0 to 100 %RH Response time8 63% <5 to 30 s
Response time6 63% 8 s Long-term drift9 Normal range <0.02 °C/y
Long-term drift7 Typ. <0.25 %RH/y Table 2 Temperature sensor specifications.
Table 1 Humidity sensor specifications.
ΔRH [%RH] ΔT [C]
Maximal tolerance Maximal tolerance
±8 Typical tolerance ±1.5 Typical tolerance
0 10 20 30 40 50 60 70 80 90 100 -30 -10 10 30 50 70 90
Relative humidity [%RH] Temperature [°C]
Figure 2 Typical and maximal tolerance for the relative humidity Figure 3 Typical and maximal tolerance for the temperature
in %RH at 25 °C. sensor in °C.
1 For definition of typ. and max. accuracy tolerance, 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.
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 1.1.
6 Time for achieving 63% of a humidity step function, valid at 25°C and 1 m/s
airflow. Humidity response time in the application depends on the design-in of
7 Typical value for operation in normal RH/T operating range. Max. value is < 0.5 8 Temperature response time depends on heat conductivity of sensor substrate
%RH/y. Value may be higher in environments with vaporized solvents, out- and design-in of sensor in application.
gassing tapes, adhesives, packaging materials, etc. For more details please 9 Typical value for operation in normal T operating range. Max. value is <
refer to Handling Instructions. 0.04°C/y.
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1.1 RH Accuracy at Various Temperatures 1.2 Recommended Storage and Operating
Typical RH accuracy at 25°C is defined in Figure 2. For Conditions
other temperatures, typical accuracy has been evaluated The sensor shows best performance when operated within
to be as displayed in Figure 4. recommended normal temperature and humidity range of
5 – 60 °C and 20 – 80 %RH, respectively. Long term
100 ±4.5 ±4 ±4 ±4 ±4 ±4 ±4.5 ±5 ±5 exposure to conditions outside normal range, especially at
Relative Humidity [%RH] 90 ±4.5 ±4 ±3.5 ±3.5 ±3.5 ±3.5 ±4 ±4.5 ±5 high humidity, may temporarily offset the RH signal (e.g.
80 ±4 ±3.5 ±3 ±3 ±3 ±3.5 ±3.5 ±4 ±4.5 +3%RH after 60h at >80%RH). After returning into the
70 ±4 ±3.5 ±3 ±3 ±3 ±3 ±3.5 ±3.5 ±4 normal temperature and humidity range the sensor will
60 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3.5 ±3.5 slowly come back to calibration state by itself. Prolonged
50 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3 ±3.5 exposure to extreme conditions may accelerate ageing.
40 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3 ±3 To ensure stable operation of the humidity sensor, the
30 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3 ±3 conditions described in the document “SHTxx Handling
20 ±3.5 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3 Instructions” regarding exposure to volatile organic
10 ±4 ±4 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5 compounds have to be met. Please note as well that this
0 ±4.5 ±4.5 ±4 ±4 ±4 ±4 ±4 ±4 ±4 does apply not only to transportation and manufacturing,
0 10 20 30 40 50 60 70 80 but also to operation of the SHTW2.
Figure 4 Typical accuracy of relative humidity measurements
given in %RH for temperatures 0 – 80°C.
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 V -
Power-up/down level VPOR Static power supply 1.05 1.2 1.35 V -
Idle state - 0.7 1.5 µA -
Measurement - 385 465 µA Average current consumption
Supply current IDD while sensor is measuring10
Average current consumption
Average - 4.8 - µA (continuous operation with one
measurement per second)10
Average power consumption
Power consumption - Average - 8.6 - µW (continuous operation with one
measurement per second) 10
Low level input voltage VIL - -0.5 - 0.3 VDD V -
High level input voltage VIH - 0.7 VDD - VDD(max) V -
Low level output voltage VOL 3 mA sink current - - 0.2 VDD - -
Table 3 Electrical specifications.
2.2 Absolute Maximum Ratings
Stress levels beyond those listed in Table 4 may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these conditions cannot be guaranteed. Exposure to the absolute maximum rating
conditions for extended periods may affect the reliability of the device.
10 These values can be reduced by using the low power measurement mode, see separate application note.
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Supply voltage, VDD -0.3 to +2.16 V
Operating temperature range -40 to +125 °C
Storage temperature range11 -40 to +125 °C
ESD HBM 2 kV
ESD MM 200 V
ESD CDM 500 V
Latch up, JESD78 Class II 100mA
Table 4 Absolute maximum ratings.
3 Timing Specifications
3.1 Sensor System Timings
Default conditions of 25 °C and 1.8 V supply voltage apply to values specified in the table below, unless otherwise stated.
Max. values are measured at -30°C and 1.98V supply voltage.
Parameter Symbol Conditions Min. Typ. Max. Units Comments
Power-up time tPU After hard reset, VDD ≥ VPOR - 182 239 µs Time between VDD reaching VPU
and sensor entering idle state
Time between ACK of soft reset
Soft reset time tSR After soft reset. - 173 230 µs command and sensor entering
Measurement duration tMEAS - - 10.8 14.4 ms Duration for a humidity and
Table 5 System timing specifications.
3.2 Communication Timings
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
SCL clock frequency fSCL - 0 - 400 kHz -
Hold time (repeated) START tHD;STA After this period, the first 0.6 - - µs -
condition clock pulse is generated
LOW period of the SCL clock tLOW - 1.3 - - µs -
HIGH period of the SCL clock tHIGH - 0.6 - - µs -
Set-up time for a repeated tSU;STA - 0.6 - - µs -
SDA hold time tHD;DAT - 0 - - -
SDA set-up time tSU;DAT - 100 - - ns -
SCL/SDA rise time tR - 20 - 300 ns -
SCL/SDA fall time tF - 20 * - 300 ns -
SDA valid time tVD;DAT - - - 0.9 µs -
Set-up time for STOP tSU;STO - 0.6 - - µs -
Capacitive load on bus line CB - - - 400 pF -
Table 6 Communication timing specifications. The numbers above are values according to the I2C specification.
11 The recommended storage temperature range is 10-50°C. Please consult the document “SHTxx Handling Instructions ” for more information.
12 These values can be reduced by using the low power measurement mode, see separate application note.
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tHIGH tLOW tR tF
tVD;DAT tF tR
Figure 5 Timing diagram for digital input/output pads. SDA directions are seen from the sensor. Bold SDA lines are controlled by the
sensor, plain SDA lines are controlled by the micro-controller. Note that SDA valid read time is triggered by falling edge of preceding toggle.
4 Interface Specifications The SDA pin is used to transfer data in and out of the
sensor. For safe communication, the timing specifications
The SHTW2 supports I2C fast mode (SCL clock frequency defined in the I2C manual must be met.
from 0 to 400 kHz) with clock stretching. For detailed To avoid signal contention, the microcontroller must only
information on the I2C protocol, refer to NXP I2C-bus drive SDA and SCL low. External pull-up resistors (e.g.
specification and user manual UM10204, Rev. 4, 10 kΩ) are required to pull the signal high. For
February 13, 2012: dimensioning resistor sizes please take bus capacity
http://ics.nxp.com/support/documents/interface/pdf/I2C.bu requirements into account. It should be noted that pull-up
s.specification.pdf resistors may be included in I/O circuits of
The SHTW2 comes in a 4-pin flip chip package – see microcontrollers.
Table 7. VDD
Pin Name Comments MCU (master) RP RP (slave)
1 VDD Supply voltage SCL IN SCL
1 A 4 SCL OUT C = 100nF
2 SCL Serial clock, SDA IN SDA
bidirectional BC SDA OUT
3 SDA Serial data, XY GND
bidirectional 2 3
Figure 6 Typical application circuit, including pull-up resistors
4 VSS Ground RP and decoupling of VDD and VSS by a capacitor.
Table 7 SHTW2 pin assignment (top view). For good performance of the SHTW2 in the application, it
is important to know that the solder balls of the SHTW2
Power-supply pins supply voltage (VDD) and ground offer the best thermal contact to the temperature sensor.
(VSS) must be decoupled with a 100 nF capacitor that The humidity sensor is centered on the bottom side of the
shall be placed as close to the sensor as possible – see package and must not be obstructed by underfill or other
Figure 6. material. For more information on design-in, please refer
SCL is used to synchronize the communication between to the document “SHTxx Design Guide”.
microcontroller and the sensor. The master must keep the
clock frequency within 0 to 400 kHz as specified in Table
6. The SHTW2 may pull down the SCL line when clock
stretching is enabled.
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5 Operation and Communication 5.4 Sensor Behavior during Measurement and
All commands and memory locations of the SHTW2 are Clock Stretching
mapped to a 16-bit address space which can be accessed In general, the sensor does not respond to any I2C activity
via the I2C protocol. during measurement, i.e. I2C read and write headers are
not acknowledged (NACK). However, when clock
SHTW2 Bin. Dec. Hex. stretching has been enabled by using a corresponding
I2C address 111’0000 112 0x70 measurement command, the sensor responds to a read
header with an ACK and subsequently pulls down the SCL
Table 8 SHTW2 I2C device address. line until the measurement is complete. As soon as the
5.1 Power-Up and Communication Start measurement is complete, the sensor starts sending the
Upon VDD reaching the power-up voltage level VPOR, the For best possible repeatability of humidity and temperature
SHTW2 enters idle state after a duration of tPU. In idle measurements, it is recommended to avoid any
state, the SHTW2 is ready to receive commands from the communication on the I2C bus while the SHTW2 is
master (microcontroller). measuring. For more information, see application note
Each transmission sequence begins with START condition “SHTC1/SHTW1 Optimization of Repeatibility”.
(S) and ends with an (optional) STOP condition (P) as During measurement, the sensor has a current
described in the I2C-bus specification. Whenever the consumption according to Table 3.
sensor is powered up, but not performing a measurement
or communicating, it automatically enters idle state for 5.5 Readout of Measurement Results
energy saving. After a measurement command has been issued and the
Please note that in case VDD is set to 0 V (GND), e.g. in sensor has completed the measurement, the master can
case of a power off of the SHTW2, the SCL and SDA pads read the measurement results by sending a START
are also pulled to GND. Consequently, the I2C bus is condition followed by an I2C read header. The sensor will
blocked while VDD of the SHTW2 is set to 0 V. acknowledge the reception of the read header and send
5.2 Measurement Commands two bytes of data followed by one byte CRC checksum
and another two bytes of data followed by one byte CRC
The SHTW2 provides the possibility to define the sensor checksum. Each byte must be acknowledged by the
behavior during measurement as well as the transmission microcontroller with an ACK condition for the sensor to
sequence of measurement results. These characteristics continue sending data. If the SHTW2 does not receive an
are defined by the appropriate measurement command ACK from the master after any byte of data, it will not
(see Table 9). Each measurement command triggers both continue sending data.
a temperature and a humidity measurement. Whether the sensor sends out humidity or temperature
Clock Stretching Clock Stretching data first depends on the measurement command that
Enabled Disabled was sent to the sensor to initiate the measurement (see
Read T Read H Read T Read H Table 9).
First First First First The I2C master can abort the read transfer with a NACK
0x7CA2 0x5C24 0x7866 0x58E0 condition after any data byte if it is not interested in
Table 9 Measurement commands. subsequent data, e.g. the CRC byte or the second
measurement result, in order to save time.
5.3 Starting a Measurement In case the user needs humidity and temperature data but
A measurement communication sequence consists of a does not want to process CRC data, it is recommended to
START condition followed by the I2C header with the 7-bit read the first two bytes of data with the CRC byte (without
I2C device address and a write bit (write W: ‘0’). The processing the CRC data) and abort the read transfer after
sensor indicates the proper reception of a byte by pulling reading the second two data bytes with a NACK. This
the SDA pin low (ACK bit) after the falling edge of the 8th procedure is more time efficient than starting two different
SCL clock. Then the sensor is ready to receive a 16-bit measurements and aborting the read transfer after the first
measurement command. Again, the SHTW2 two data bytes each time.
acknowledges the proper reception of each byte with ACK 5.6 Soft Reset
condition. A complete measurement cycle is presented in
Figure 7. The SHTW2 provides a soft reset mechanism that forces
With the acknowledgement of the measurement the system into a well-defined state without removing the
command, the SHTW2 starts measuring humidity and power supply. If the system is in idle state (i.e. if no
temperature. measurement is in progress) the soft reset command can
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be sent to SHTW2 according to Figure 8. This triggers the 5.9 Conversion of Signal Output
sensor to reset all internal state machines and reload Measurement data is always transferred as 16-bit values.
calibration data from the memory. These values are already linearized and temperature
Command Hex. Code Bin. Code compensated by the SHTW2. Humidity and temperature
Software reset 0x805D 1000’0000’0101’1101 values can be calculated with the formulas in given below.
Table 10 Soft reset command. Relative humidity conversion formula (result in %RH):
RH 100 S RH
5.7 Read-out of ID Register 216
The SHTW2 has an ID register which contains an SHTW2- Temperature conversion formula (result in °C):
specific product code. The read-out of the ID register can ST
be used to verify the presence of the sensor and proper T 45 175
communication. The command to read the ID register is 216
shown in Table 11.
Command Hex. Code Bin. Code SRH and ST denote the raw sensor output (as decimal
values) for humidity and temperature, respectively.
Read ID register 0xEFC8 1110’1111’1100’1000
Table 11 Read-out command of ID register.
It needs to be sent to the SHTW2 after an I2C write
header. After the SHTW2 has acknowledged the proper
reception of the command, the master can send an I2C
read header and the SHTW2 will submit the 16-bit ID
followed by 8 bits of CRC. The structure of the ID is
described in Table 12.
bits 5 to 0: SHTW2-specific product code
bits 15 to 6: unspecified information
Table 12 Structure of the 16-bit ID. Bits 15:6 of the ID contain
unspecified information (marked as “x”), which may vary from
sensor to sensor, while bits 5:0 contain the SHTW2-specific
5.8 Checksum Calculation
The 8-bit CRC checksum transmitted after each data word
is generated by a CRC algorithm with the properties
displayed in Table 13. The CRC covers the contents of the
two previously transmitted data bytes.
Width 8 bits
Polynomial 0x31 (x8 + x5 + x4 + 1)
Reflect input False
Reflect output False
Final XOR 0x00
Examples CRC (0x00) = 0xAC
CRC (0xBEEF) = 0x92
Table 13 SHTW2 I2C CRC properties.
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5.10 Communication Data Sequences
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
S 1 1 1 0 0 0 0 0 ACK 0 1 0 1 1 1 0 0 ACK 0 0 1 0 0 1 0 0 ACK P SHTW2 measuring
I2C address + write Measurement command MSB Measurement command LSB Measurement in progress
clock stretching 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
disabled S 1 1 1 0 0 0 0 1 NACK P SHTW2 measuring SHTW2 in idle S 1 1 1 0 0 0 0 1 ACK
repeated I2C address + read measurement cont’d measurement I2C address + read
while meas. is in prog. (polling) completed
29 30 31 32 33 34 35 36 37 38
clock S 1 1 1 0 0 0 0 1 ACK SHTW2 measuring,
stretching enabled SCL line pulled low
I2C address + read measurement continued
while meas. is in progress
50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76
1 0 1 0 0 0 0 1 ACK 0 0 1 1 0 0 1 1 ACK 0 0 0 1 1 1 0 0 ACK
Humidity MSB Humidity LSB Humidity CRC checksum
77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104
0 1 1 0 0 1 0 0 ACK 1 0 0 0 1 0 1 1 ACK 1 1 0 0 0 1 1 1 ACK P
Temperature MSB Temperature LSB Temperature CRC checksum
Figure 7 Communication sequence for starting a measurement and reading measurement results displaying both clock stretching options.
The numerical example corresponds to a read humidity-first command with clock stretching enabled. The physical values of the transmitted
measurement results are 65.6 %RH and 23.7 °C. Clear blocks are controlled by the microcontroller, grey blocks by the SHTW2.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
S 1 1 1 0 0 0 0 0 ACK 1 0 0 0 0 0 0 0 ACK 0 1 0 1 1 1 0 1 ACK P
I2C address + write Command MSB Command LSB
Figure 8 Command access communication sequence. The example shows a soft reset command. Clear blocks are controlled by the
microcontroller, grey blocks by the SHTW2.
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6 Quality with a diameter of 330 mm (7 inches), sealed into
6.1 Environmental Stability antistatic ESD bags. A drawing of the packaging tape with
sensor orientation is shown in Figure 12.
Qualification of the SHTW2 is performed based on the
JEDEC JESD47 qualification test method.
6.2 Material Contents Quantity Packaging Reel Diameter Order Number
The SHTW2 is RoHS and REACH compliant. 1’000 Tape & Reel 180 mm (7 inch) 1-101484-01
10’000 Tape & Reel 180 mm (7 inch) 1-101380-01
7 Package and Traceability Table 14 SHTW2 ordering options.
SHTW2 sensors are provided in a flip chip package with
an outline of 1.31 × 0.74 × 0.54 mm3 and 4 solder balls
with a pitch of 0.4 mm. The humidity sensor is centered on
the bottomside of the package. The top side of the
package is protected with a black epoxy layer. This is
called back side coating, because it is applied to the non-
functional (back) side of the chip.
For a proper measurement it is important that the humidity
sensor has good access to the ambient air and is not
obstructed by underfill or other material. Therefor the
SHTW2 must be assembled without underfill adhesive.
The SHTW2 package consists of silicon and lead-free
solder balls . To protect the product from mechanical
damage, any mechanical impact on the package shall be
avoided. Any vertical or lateral force onto the package
(e.g. during handling, assembly and in the application)
shall not exceed 2N.
The Moisture Sensitivity Level classification of the SHTW2
is MSL1, according to IPC/JEDEC J-STD-020.
All SHTW2 sensors are marked for easy identification and
traceability. The marking on the sensor consists of a 5-
digit, alphanumeric tracking code and a pin-1 indicator.
The pin-1 indicator is located in the top left corner. The
bottom side contains a pin-1 indicator shaped as a
teardrop around the solder ball of pin 1. See Figure 9 for
Figure 9 Top side marking (left side): pin-1 indicator and 5-digit
alphanumeric tracking code. Bottom side marking (right side):
8 Ordering Information
The SHTW2 can be ordered in tape and reel packaging
with different reel sizes. The sensors are supplied in reels
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9 Technical Drawings
9.1 Package Outline
Dim. Min. Nom. Max.
A - 0.16 -
B 0.71 0.74 0.77
C 1.28 1.31 1.34
D 0.38 0.40 0.42
E 0.38 0.40 0.42
F 0.78 0.80 0.82
G 0.48 0.54 0.60
H 0.12 0.15 0.18
M 0.17 0.20 0.23
Figure 10 Package outline drawing of the SHTW2.
9.2 Recommended Metal Land Pattern
0.24 Solder pad dimensions (copper)
Solder paste dimensions (stencil opening)
Figure 11 Recommended metal land pattern for SHTW2 (all dimensions are in mm). Recommended solder paste stencil thickness is 75 to
100 µm. The solder pads on the PCB are recommended to be non solder mask defined (NSMD). Copper traces leading towards the solder
pads are recommended to have a width of max. 0.09 mm in the direct vicinity of the pads. For general information on land pattern design
refer to the IPC-7351 standard.
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9.3 Tape & Reel Packaging
Figure 12 Technical drawing of the packaging tape with sensor orientation in tape. Header tape is to the right and trailer tape to the left on
this drawing. Dimensions are given in millimeters.
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10 Further Information
For more in-depth information on the SHTW2 and its application please consult the following documents:
Document Name Description Source
Instructions on the assembly of Sensirion chip- Available for download from the SHTW2 product
SHTxx Assembly of CSP scale packages (CSP) website:
SHTW2 Optimization of Measures for optimization of repeatability of Available for download from the SHTW2 product
Repeatibility sensor output. website:
SHTW2 Low Power Measurement Description of SHTW2 low power measurement Available for download from the SHTW2 product
Mode mode. website:
Design guidelines for designing SHTxx humidity Available for download at the Sensirion humidity
SHTxx Design Guide sensors into applications sensors download center:
Guidelines for proper handling of SHTxx humidity Available for download at the Sensirion humidity
SHTxx Handling Instructions sensors sensors download center:
Sensirion Humidity Sensor Available for download at the Sensirion humidity
Specification Statement Definition of sensor specifications. sensors download center:
Table 15 Documents containing further information relevant for the SHTW2.
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Date Version Page(s) Changes
13. May 2016 1 all Initial released version.
Updated product picture, minor adjustments on outline dimensions, added ordering
information, correction of typos.
03. August 2016 2 10 Pin numbering in Figure 10 aligned with Table 7.
25. July 2017 3 1, 2 Temperature accuracy specification improved to typ. ±0.3°C / max. ±0.4°C
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Warning, Personal Injury
Do not use this product as safety or emergency stop devices or in such defects shall be found, to SENSIRION’s reasonable
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than its intended and authorized use. Before installing, handling, the defective product shall be returned to SENSIRION’s factory at
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application notes. Failure to comply with these instructions could the warranty period for any repaired or replaced product shall be
result in death or serious injury. limited to the unexpired portion of the original period.
This warranty does not apply to any equipment which has not been
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ESD Precautions conditions of operation provided for in the data sheet and proper use of
The inherent design of this component causes it to be sensitive to the goods. SENSIRION explicitly disclaims all warranties, express or
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degradation, take customary and statutory ESD precautions when not in accordance with the technical specifications.
handling this product. SENSIRION does not assume any liability arising out of any application
See application note “ESD, Latchup and EMC” for more information. or use of any product or circuit and specifically disclaims any and all
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SENSIRION warrants solely to the original purchaser of this product for recommended parameters, must be validated for each customer’s
a period of 12 months (one year) from the date of delivery that this applications by customer’s technical experts. Recommended
product shall be of the quality, material and workmanship defined in parameters can and do vary in different applications.
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Buyer, provided that: Copyright © 2017, by SENSIRION.
notice in writing describing the defects shall be given to CMOSens® is a trademark of Sensirion
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Sensirion AG Sensirion Inc., USA Sensirion Korea Co. Ltd.
Laubisruetistr. 50 phone: +1 312 690 5858 phone: +82 31 337 7700~3
CH-8712 Staefa ZH firstname.lastname@example.org email@example.com
Switzerland www.sensirion.com www.sensirion.co.kr
phone: +41 44 306 40 00 Sensirion Japan Co. Ltd. Sensirion China Co. Ltd.
fax: +41 44 306 40 30 phone: +81 3 3444 4940 phone: +86 755 8252 1501
firstname.lastname@example.org email@example.com firstname.lastname@example.org
www.sensirion.com www.sensirion.co.jp www.sensirion.com.cn
Sensirion Taiwan Co. Ltd
phone: +886 3 5506701
email@example.com To find your local representative, please visit
www.sensirion.com Version 3 – July 2017 14/14
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