SHTC1 Series Datasheet by Sensirion AG

View All Related Products | Download PDF Datasheet
SENSIRION THE SENSOR comma-w u 0 C. w r I
www.sensirion.com Version 4 – August 2015 1/14
Datasheet SHTC1
Humidity and Temperature Sensor IC
Best performance-to-price ratio
Fully calibrated and reflow solderable
Ultra-low power consumption
Power-up and measurement within 1 ms
1.8 V supply voltage
Ultra-small DFN package: 2 × 2 × 0.75 mm
3
Typical accuracy: ±3 %RH and ±0.3 °C
Benefits of Sensirion’s CMOSens
®
Technology
High reliability and long-term stability
Industry-proven technology with a track record of more
than 10 years
Designed for mass production
Optimized for lowest cost
Low signal noise
Contents of this Data Sheet
1 Humidity and Temperature Sensor Specifications ............ 2
2 Electrical Specifications .................................................... 3
3 Timing Specifications ........................................................ 4
4 Interface Specifications ..................................................... 6
5 Operation and Communication ......................................... 6
6 Quality ............................................................................... 9
7 Packaging and Traceability ............................................... 9
8 Ordering Information ......................................................... 9
9 Technical Drawings ......................................................... 10
10 Further Information.......................................................... 12
Important Notices...................................................................... 14
Block diagram
Figure 1 Functional block diagram of the SHTC1.
RH sensor T sensor
Signal conditioning Signal conditioning
ADC
I2C interface Calibration mem.
VDD VSS SDA SCL
Data processing and system control
analog
digital
Product Summary
The SHTC1 is a digital humidity and temperature sensor
designed especially for high-volume consumer electronics
applications. This sensor is strictly designed to overcome
conventional limits for size, power consumption, and
performance to price ratio in order to fulfill current and
future requirements. Sensirion’s CMOSens
®
technology
offers a complete sensor system on a single chip,
consisting of a capacitive humidity sensor, a bandgap
temperature sensor, analog and digital signal processing,
A/D converter, calibration data memory, and a digital
communication interface supporting I
2
C fast mode. The
ultra-small, 2 × 2 × 0.75 mm
3
DFN package enables
applications in even the most limited of spaces.
The sensor covers a humidity measurement range of 0 to
100 %RH and a temperature measurement range of
30
to 100 °C with a typical accuracy of ±3 %RH and ±0.3°C
.
The operation voltage of 1.8 V and
an energy budget below
1 µJ per measurement make the SHTC1 suitable
for
mobile or wireless applications running on the
power budgets. With the industry-
proven quality and
reliability of Sensirion’s
humidity and temperature sensors
and constant accuracy over a large measurement range,
the SHTC1 offers an unprecedented performance-to-
price
ratio. Tape and reel packaging together with suitability for
standard SMD assembly processes make the SHTC1
predestined for high-volume applications.
SENSIRION THE SENSOR comma-w
www.sensirion.com Version 4 – August 2015 2/14
1 Humidity and Temperature Sensor Specifications
Relative Humidity
Parameter
Conditions
Value
Units
Accuracy tolerance
1
Typ. ±3.0 %RH
Max.
see
Figure
2
%RH
Repeatability
2
-
0.1
%RH
Resolution
3
-
0.01
%RH
Hysteresis - ±1 %RH
Specified range
4
extended
5
0
to
100
%RH
Response time
6
τ 63% 8 s
Long
-
term drift
7
Typ.
<0.
2
5
%RH/y
Table 1 Humidity sensor specifications.
Figure 2 Typical and maximal tolerance for relative humidity in
%RH at 25 °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.
Temperature
Parameter
Conditions
Value
Units
Accuracy tolerance
1
Typ. ±0.3 °C
M
ax
.
see
Figure
3
°
C
Repeatability
2
-
0.1
°
C
Resolution
3
-
0.01
°C
Specified range
4
-
30
to
+
100
°
C
Response time
8
τ 63% <5 to 30 s
Long
-
term drift
9
Typ.
<0.
02
°C/y
Table 2 Temperature sensor specifications.
Figure 3 Typical and maximal tolerance for temperature sensor
in °C.
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 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.
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.
±0
±2
±4
±6
±8
±10
0 10 20 30 40 50 60 70 80 90 100
∆RH [%RH]
Relative humidity [%RH]
Maximum accuracy
Typical Accuracy
±0
±0.5
±1
±1.5
±2
-30 -10 10 30 50 70 90
∆T [°C]
Temperature [°C]
Maximum Accuracy
Typical Accuracy
SENSIRION THE SENSOR COMPANY
www.sensirion.com Version 4 – August 2015 3/14
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
M
in
T
yp
.
M
ax
Units
Comments
Supply
v
oltage
V
DD
1.62
1.8
1.98
V
-
Power
-
u
p
/down
l
evel
V
POR
Static power supply
1.05
1.2
1.35
V
-
Supply current I
DD
Idle state
-
0.7
1.5
µA
-
Measurement - 385 465 µA
Average current consumption
while sensor is measuring
10
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
V
IL
-
-
0.5
0.3 V
DD
V
-
High level input voltage V
IH
- 0.7 V
DD
V
DD
(max)
+ 0.5 V -
Low level output voltage
V
OL
3 mA sink current
-
-
0.2 V
DD
-
-
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 ±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
Relative Humidity [%RH]
Temperature [°C]
SENSIRION THE SENSOR COMPANY
www.sensirion.com Version 4 – August 2015 4/14
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.
Parameter
Rating
Supply voltage, V
DD
-
0.3
to
+
2.16 V
Operating
temperature
range
-
40
to +1
25 °C
Storage
temperature
range
11
-
40
to
+
1
25
°C
ESD HBM
2
kV
ESD MM
200 V
ESD CDM
500 V
Latch up
,
JESD78 Class II, 125°C
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 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 t
PU
After hard reset, V
DD
≥ V
POR
- 182 239 µs
Time between V
DD
reaching V
PU
and sensor entering idle state
Soft reset time t
SR
After soft reset. - 173 230 µs
Time between ACK of soft reset
command and sensor entering
idle state
Measurement duration t
MEAS
- - 10.8 14.4 ms
Duration for a humidity and
temperature measurement
12
Table 5 System timing specifications.
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.
SENSIRION THE SENSOR COMPANY sot SBA:
www.sensirion.com Version 4 – August 2015 5/14
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
M
in
.
T
yp
.
M
ax
.
Units
Comments
SCL
clock
frequency
f
SCL
-
0
-
400
k
Hz
-
H
old time (repeated) START
condition t
HD;STA
After this period, the first
clock pulse is generated 0.6 - - µs -
LOW period of the
SCL
clock
t
LOW
-
1.3
-
-
µs
-
HIGH period of the SCL clock
t
HIGH
-
0.6
-
-
µs
-
S
et
-
up time for a repeated
START condition t
SU;STA
- 0.6 - - µs -
SDA
h
old
t
ime
t
HD;DAT
-
0
-
-
-
-
SDA s
et
-
u
p
t
ime
t
SU;DAT
-
100
-
-
ns
-
SCL/SDA rise time
t
R
-
20
-
300
ns
-
SCL/SDA fall time t
F
-
20 *
(V
DD
/5.5)
- 300 ns -
SDA valid time
t
VD;DAT
-
-
-
0.9
µs
-
S
et
-
up time for STOP
condition t
SU;STO
- 0.6 - - µs -
Capacitive
l
oad on
b
us
l
ine
C
B
-
-
-
400
pF
-
Table 6 Communication timing specifications. The numbers above are values according to the I
2
C specification.
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.
SCL
70%
3
0%
tLOW
1/fSCL
tHIGH
tR
tF
SDA
70%
3
0%
tSU;DAT
tHD;DAT
DATA IN
tR
SDA
70%
3
0%
DATA OUT
tVD;DAT
tF
SENSIRION THE SENSOR comma-w htt :l/icsnx .com/su ortJdocuments/interface/ df/IZCJJu s.sgecification.gdf v0 2C VDD MCU (masmr) SCL m 1 SCLOUT—q $3 SDA M 5m OUT—4 5ND
www.sensirion.com Version 4 – August 2015 6/14
4 Interface Specifications
The SHTC1 supports I
2
C fast mode (SCL clock frequency
from 0 to 400 kHz) with clock stretching. For detailed
information on the I
2
C protocol, refer to NXP I
2
C-bus
specification and user manual UM10204, Rev. 4,
February 13, 2012:
http://ics.nxp.com/support/documents/interface/pdf/I2C.bu
s.specification.pdf
The SHTC1 comes in a 4-pin package – see Table 7.
Pin
Name
Comment
s
1
VDD
Supply
v
oltage
2
SCL
Serial
c
lock, bidirectional
3
SDA
Serial
d
ata, bidirectional
4
VSS
Ground
Table 7 SHTC1 pin assignment (top view). The center pad is
internally connected to VSS.
Power-supply pins supply voltage (VDD) and ground (VSS)
must be decoupled with a 100 nF capacitor that shall be
placed as close to the sensor as possible – see Figure 6.
SCL is used to synchronize the communication between
microcontroller and the sensor. The master must keep the
clock frequency within 0 to 400 kHz as specified in Table 6.
The SHTC1 may pull down the SCL line when clock
stretching is enabled.
The SDA pin is used to transfer data in and out of the
sensor. For safe communication, the timing specifications
defined in the I
2
C manual must be met.
To avoid signal contention, the microcontroller must only
drive SDA and SCL low. External pull-up resistors (e.g.
10 kΩ
) are required to pull the signal high. For
dimensioning resistor sizes please take bus capacity
requirements into account. It should be noted that pull-up
resistors may be included in I/O circuits of microcontrollers.
Figure 6 Typical application circuit, including pull-up resistors R
P
and decoupling of VDD and VSS by a capacitor.
For good performance of the SHTC1 in the application, it is
important to know that the center pad of the SHTC1 offers
the best thermal contact to the temperature sensor. For
more information on design-in, please refer to the document
“SHTxx Design Guide”.
For mechanical reasons the center pad should be soldered.
Electrically, the center pad is internally connected to GND
and may be connected to the GND net on the PCB or left
floating.
5 Operation and Communication
All commands and memory locations of the SHTC1 are
mapped to a 16-bit address space which can be accessed
via the I
2
C protocol.
SHTC1
Bin
.
Dec
.
Hex
.
I
2
C
address 111’0000 112 0x70
Table 8 SHTC1
I
2
C
device address.
5.1 Power-Up and Communication Start
Upon VDD reaching the power-up voltage level V
POR
, the
SHTC1 enters idle state after a duration of t
PU
. In idle state,
the SHTC1 is ready to receive commands from the master
(microcontroller).
Each transmission sequence begins with START condition
(S) and ends with an (optional) STOP condition (P) as
described in the I2C-bus specification. Whenever the
sensor is powered up, but not performing a measurement
or communicating, it automatically enters idle state for
energy saving.
Please note that in case VDD is set to 0 V (GND), e.g. in
case of a power off of the SHTC1, the SCL and SDA pads
are also pulled to GND. Consequently, the I
2
C bus is
blocked while VDD of the SHTC1 is set to 0 V.
5.2 Measurement Commands
The SHTC1 provides the possibility to define the sensor
behavior during measurement as well as the transmission
sequence of measurement results. These characteristics
are defined by the appropriate measurement command
(see Table 9). Each measurement command triggers both
a temperature and a humidity measurement.
Clock Stretching
Enabled
Clock Stretching
Disabled
Read T
First
Read H
First
Read T
First
Read H
First
0x7CA2 0x5C24 0x7866 0x58E0
Table 9 Measurement commands.
2
1
3
4
SHTC1
AXY89
S
DA
SCL
GND
VDD
MCU
(master)
RP
RP
SCL OUT
SDA OUT
SDA IN
SCL IN
C = 100
nF
SHT
C1
(slave)
SHTC1
AXY89
SENSIRION THE SENSOR COMPANY D xxxx'xxxx'xx 00'0111
www.sensirion.com Version 4 – August 2015 7/14
5.3 Starting a Measurement
A measurement communication sequence consists of a
START condition followed by the I
2
C header with the 7-bit
I
2
C device address and a write bit (write W: ‘0’). The sensor
indicates the proper reception of a byte by pulling the SDA
pin low (ACK bit) after the falling edge of the 8th SCL clock.
Then the sensor is ready to receive a 16-bit measurement
command. Again, the SHTC1 acknowledges the proper
reception of each byte with ACK condition. A complete
measurement cycle is presented in Figure 7.
With the acknowledgement of the measurement command,
the SHTC1 starts measuring humidity and temperature.
5.4 Sensor Behavior during Measurement and
Clock Stretching
In general, the sensor does not respond to any I
2
C activity
during measurement, i.e. I
2
C read and write headers are not
acknowledged (NACK). However, when clock stretching
has been enabled by using a corresponding measurement
command, the sensor responds to a read header with an
ACK and subsequently pulls down the SCL line until the
measurement is complete. As soon as the measurement is
complete, the sensor starts sending the measurement
results.
During measurement, the sensor has a current
consumption according to Table 3.
For best possible repeatability of humidity and temperature
measurements, it is recommended to avoid any
communication on the I2C bus while the SHTC1 is
measuring. For more information, see application note
“SHTC1 Optimization of Repeatibility”.
5.5 Readout of Measurement Results
After a measurement command has been issued and the
sensor has completed the measurement, the master can
read the measurement results by sending a START
condition followed by an I
2
C read header. The sensor will
acknowledge the reception of the read header and send two
bytes of data followed by one byte CRC checksum and
another two bytes of data followed by one byte CRC
checksum. Each byte must be acknowledged by the
microcontroller with an ACK condition for the sensor to
continue sending data. If the SHTC1 does not receive an
ACK from the master after any byte of data, it will not
continue sending data.
Whether the sensor sends out humidity or temperature data
first depends on the measurement command that was sent
to the sensor to initiate the measurement (see Table 9).
The I
2
C master can abort the read transfer with a NACK
condition after any data byte if it is not interested in
subsequent data, e.g. the CRC byte or the second
measurement result, in order to save time.
In case the user needs humidity and temperature data but
does not want to process CRC data, it is recommended to
read the first two bytes of data with the CRC byte (without
processing the CRC data) and abort the read transfer after
reading the second two data bytes with a NACK. This
procedure is more time efficient than starting two different
measurements and aborting the read transfer after the first
two data bytes each time.
5.6 Soft Reset
The SHTC1 provides a soft reset mechanism that forces the
system into a well-defined state without removing the power
supply. If the system is in idle state (i.e. if no measurement
is in progress) the soft reset command can be sent to
SHTC1 according to Figure 8. This triggers the sensor to
reset all internal state machines and reload calibration data
from the memory.
Command
Hex. Code
Bin. Code
Software reset
0x805D
1000’0000’0101’1101
Table 10 Soft reset command.
5.7 Read-out of ID Register
The SHTC1 has an ID register which contains an SHTC1-
specific product code. The read-out of the ID register can
be used to verify the presence of the sensor and proper
communication. The command to read the ID register is
shown in Table 11.
Command
Hex. Code
Bin. Code
Read ID register
0xEFC8
1110’1111’1100’1000
Table 11 Read-out command of ID register.
It needs to be sent to the SHTC1 after an I
2
C write header.
After the SHTC1 has acknowledged the proper reception of
the command, the master can send an I
2
C read header and
the SHTC1 will submit the 16-bit ID followed by 8 bits of
CRC. The structure of the ID is described in Table 12.
16
-
bit ID
xxxx'xxxxxx
00’0111
bits 5 to 0: SHTC1-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 SHTC1-specific
product code.
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.
SENSIRION THE SENSOR COMPANY CRC 1 HTC1 \md‘e x m 3111000012 measurement ) Completed PC eddiess » read
www.sensirion.com Version 4 – August 2015 8/14
Property Value
Name
CRC
-
8
Width
8 bits
Polynomial
0x31 (x
8
+ x
5
+ x
4
+ 1)
Initialization
0xFF
Reflect input
False
Reflect output
False
Final XOR
0x00
Examples
CRC (0x00) = 0xAC
CRC (0xBEEF) = 0x92
Table 13 SHTC1
I
2
C
CRC properties.
5.9 Conversion of Sensor Output
Measurement data is always transferred as 16-bit values.
These values are already linearized and temperature
compensated by the SHTC1. Humidity and temperature
values can be calculated with the formulas in given below.
Relative humidity conversion formula (result in %RH):
16
RH
2
S
100 RH =
Temperature conversion formula (result in °C):
16
T
2
S
175 45 T +=
S
RH
and S
T
denote the raw sensor output (as decimal
values) for humidity and temperature, respectively.
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
ACK
ACK
ACK
P SHTC1 measuring
1
1
1
0
0
0
0
0
0
1
0
1
1
1
0
0
0
0
1
0
0
1
0
0
I
2
C address + write
Measurement command MSB
Measurement command LSB Measurement in progress
29 30 31 32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47 48 49
S
NACK
P
SHTC1 measuring
SHTC1 in idle
state
S
ACK
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
repeated I
2
C address + read
while meas. is in prog. (polling)
measurement cont’d
measurement
completed I
2
C address + read
29 30 31 32 33 34 35 36 37 38
S
ACK
SHTC1 measuring,
SCL line pulled low
1
1
1
0
0
0
0
1
I
2
C address + read
while meas. is in progress measurement continued
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
ACK
ACK
ACK
1
0
1
0
0
0
0
1
0
0
1
1
0
0
1
1
0
0
0
1
1
1
0
0
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
ACK
ACK
ACK
P
0
1
1
0
0
1
0
0
1
0
0
0
1
0
1
1
1
1
0
0
0
1
1
1
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 62.9 %RH and 23.7 °C. Clear blocks are controlled by the microcontroller, grey blocks by the SHTC1.
clock stretching
disabled
clock
stretching enabled
SENSIRION THE SENSOR comma-w XX
www.sensirion.com Version 4 – August 2015 9/14
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
ACK
ACK
ACK
P
1
1
1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
1
0
1
1
1
0
1
I
2
C 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 SHTC1.
6 Quality
6.1 Environmental Stability
Qualification of the SHTC1 is performed based on the
JEDEC JESD47 qualification test method.
6.2 Material Contents
The device is fully RoHS and WEEE compliant, e.g. free of
Pb, Cd, and Hg.
7 Packaging and Traceability
SHTC1 sensors are provided in a DFN package with an
outline of 2 × 2 × 0.75 mm
3
and a terminal pitch of 1 mm.
DFN stands for dual flat no leads. The humidity sensor
opening is centered on the top side of the package.
The sensor chip is made of silicon and is mounted to a lead
frame. The latter is made of Cu plated with Ni/Pd/Au. Chip
and lead frame are overmolded by a green epoxy-based
mold compound. Please note that the side walls of sensor
are diced and therefore these diced lead frame surfaces are
not covered with the respective plating.
The Moisture Sensitivity Level classification of the SHTC1
is MSL1, according to IPC/JEDEC J-STD-020.
All SHTC1 sensors are laser marked for easy identification
and traceability. The marking on the sensor consists of two
lines and a pin-1 indicator. The top line contains the sensor
type (SHTC1), the bottom line contains a 5-digit,
alphanumeric tracking code. The pin-1 indicator is located
in the top left corner. See Figure 9
for illustration
.
Figure 9 Laser marking on SHTC1, the top line with the pin-1
indicator and the sensor type, the bottom line with the 5-digit
alphanumeric tracking code.
Reels are also labeled and provide additional traceability
information.
8 Ordering Information
The SHTC1 can be ordered in tape and reel packaging with
different sizes, see
Table 14
. The reels are sealed into
antistatic ESD bags. A drawing of the packaging tape with
sensor orientation is shown in
Figure 12
.
Quantity
Packaging
Reel Diameter
Order Number
1’000
Tape & Reel
180 mm (7 inch)
1
-
101110
-
01
10’000
Tape & Reel
330 mm (13 inch)
1
-
100925
-
01
Table 14 SHTC1 ordering options.
SHTC1
XXXXX
THE SENSOR comma-w SENSIRION m3 0.7
www.sensirion.com Version 4 – August 2015 10/14
9 Technical Drawings
9.1 Package Outline
Figure 10 Package outline drawing of the SHTC1. Dimensions are given in millimeters.
0.75
1.
6
1
0.7
0.2x45°
0.35
0.35
2
2
*
Mold opening shows smooth transition to package surface. Therefore
this dimension is not well defined and given for reference only.
PACKAGE OUTLINE 0‘70 ' 0‘55 NOTE: I 50min no ummsms {causal SENSIRION THe SENSOR COMPANY —w soLDER vAer DiMENSmOIS [.1 mm spam All nmzusms ms nu mumsvzns 4m mimsgimm nwnm alst/‘nn 4m SEE HIE! ITJLIB DJ! 1 us ——”-— l” 7'?! L MM (9 65 ® (a. ”‘2“ m m ME] Ba mull/rm L— J m L L-A Kn M25 up I A - A um: I‘ la mm m an [mmm 1mm :12 2 [me In [Mince mu [IA 451 MEMEX ’ MESS 3 HIKE mum ELATIVE TI] mm ME [AND MHEIJIPHZ M110 AS TEL! MIMI]! |F HIKE, IE1 HIKE] "IE I In MI] Bo IE [MLUIED [It A PUDE H A flISTAKE 'E‘ ABM M WHEN |F TIE HIKE.
www.sensirion.com Version 4 – August 2015 11/14
9.2 Metal Land Pattern
Figure 11 Recommended metal land pattern for SHTC1 (all dimensions are in mm). Recommended solder paste stencil thickness is 100µm,
pads on PCB are recommended to be non solder mask defined (NSMD).
9.3 Tape and Reel Package
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.
SENSIRION THE sensor: COMPANY A www.sensiricn.ccm/shtc1 A www.sensiricn.ccm/shtc1 A www.sensiricn.ccm/shtc1 A www.sensiricn.ccm/humidxy-dcwn\oad A www.sensiricn.ccm/humidxy-dcwn\oad A www.sensiricn.ccm/humidxy-dcwn\oad
www.sensirion.com Version 4 – August 2015 12/14
10 Further Information
For more in-depth information on the SHTC1 and its application please consult the following documents:
Document Name
Description
Source
SHTxx Assembly of SMD
Packages
Instructions on soldering and processing of the
SHTC1 in a production environment
Available for download from the SHTC1 product
website:
www.sensirion.com/shtc1
SHTC1 Optimization of
Repeatibility
Measures for optimization of repeatability of
sensor output.
Available for download from the SHTC1 product
website:
www.sensirion.com/shtc1
SHTC1 Low Power Measurement
Mode
Description of SHTC1 low power measurement
mode.
Available for download from the SHTC1 product
website:
www.sensirion.com/shtc1
SHTxx Design Guide Design guidelines for designing SHTxx humidity
sensors into applications
Available for download at the Sensirion humidity
sensors download center:
www.sensirion.com/humidity-download
SHTxx Handling Instructions Guidelines for proper handling of SHTxx humidity
sensors
Available for download at the Sensirion humidity
sensors download center:
www.sensirion.com/humidity-download
Sensirion Humidity Sensor
Specification Statement Definition of sensor specifications.
Available for download at the Sensirion humidity
sensors download center:
www.sensirion.com/humidity-download
Table 15 Documents containing further information relevant for the SHTC1.
SENSIRION THE sensor: COMPANY
www.sensirion.com Version 4 – August 2015 13/14
Revision History
Date
Version
Page(s)
Changes
February
21
,
201
3
1
all
Initial
version
May 21, 2013
2
6, 8
Section 5.2.1 removed, stop condition added to fig. 6
May
23
, 2014
3
1
-
4, 7, 9, 11
-
12
RH accuracy at various temperatures added, MSL added, ordering information
added, metal land pattern added, minor adjustments.
26. August 2015
4
3
Improved
max.
idle current.
SENSIRION THE sensor: COMPANY info us@sensirion com info@sensinon.co kr www.5ensiricn.com www sensmon.co.kr info@sensirion.com infc@sensiricn.cc.'g info@sensinon.com.cn www sensinon.com www.5ensiricn.co. g www sensmonmm cn info@sensirion.com www sensinon.com www.5ensirionmm/ccnlacl
www.sensirion.com Version 4 – August 2015 14/14
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
© 2014, 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: +1 805 409 4900
info_us@sensirion.com
www.sensirion.com
Sensirion Japan Co. Ltd.
Phone: +81 3 3444 4940
info@sensirion.co.jp
www.sensirion.co.jp
Sensirion Korea Co.
Ltd.
Phone: +82 31 337 7700~3
info@sensirion.co.kr
www.sensirion.co.kr
Sensirion China Co. Ltd.
Phone: +86 755 8252 1501
info@sensirion.com.cn
www.sensirion.com.cn
Sensirion AG (Germany)
Phone: +41 44 927 11 66
info@sensirion.com
www.sensirion.com To find your local representative, please visit www.sensirion.com/contact

Products related to this Datasheet

SENSOR HUMI/TEMP 1.8V I2C 3% SMD
Available Quantity: 4,337
Unit Price: 2.81
SENSOR HUMI/TEMP 1.8V I2C 3% SMD
Available Quantity: 5,231
Unit Price: 2.92
ENVIRONMENTAL SHLD SGP30/SHTC1
Available Quantity: 26
Unit Price: 28.45
WINGBOARD FOR ATMEL XPLAINED PRO
Available Quantity: 2
Unit Price: 16.69