1-101110-01 - SENSIRION - Datasheet.Live

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

tightest

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.

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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

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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]

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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.

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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

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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.

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

SCL OUT

SDA OUT

SDA IN

SCL IN

C = 100

nF

SHT

C1

(slave)

SHTC1

AXY89

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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'xxxx’xx

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.

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

P SHTC1 measuring

1

0

1

0

1

0

1

0

1

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

0

1

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

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

1

0

1

0

1

0

1

0

1

0

1

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

P

0

1

0

1

0

1

0

1

0

1

0

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

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

P

1

0

1

0

1

0

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

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

2

*

Mold opening shows smooth transition to package surface. Therefore

this dimension is not well defined and given for reference only.

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.

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.

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.

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

CMOSens

®

is a trademark of Sensirion

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