一款检测CO2与VOC的传感器SHTC3

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www.sensirion.com Version 0.4 – January 2018 1/13

Datasheet SHTC3

Humidity and Temperature Sensor IC

 Fully calibrated and reflow solderable

 Ultra-low power consumption

 Power-up and measurement within 1 ms

 Broad supply voltage range of 1.62 V to 3.6 V

 Ultra-small DFN package: 2 × 2 × 0.75 mm

 Typical accuracy: ±2 %RH and ±0.2 °C

Benefits of Sensirion’s CMOSens

Technology

 High reliability and long-term stability

 Industry-proven technology with a track record of more than

15 years

 Designed for mass production

 Optimized for lowest cost

 High signal-to-noise ratio

Contents of this Data Sheet

Important Notice: ....................................................... 2

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 .......................................... 11

Block diagram

Figure 1 Functional block diagram of the SHTC3.

RH sensor

T sensor

Signal conditioning

ADC

C interface

Calibration mem.

VDD

VSS

SDA

SCL

Data processing and system control

analog

digital

Product Summary

The SHTC3 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

C fast mode. The

ultra-small, 2 × 2 × 0.75 mm

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

-40 °C to 125 °C with a typical accuracy of ±2 %RH and

±0.2°C. The broad supply voltage of 1.62 V to 3.6 V and

an energy budget below 1 µJ per measurement make the

SHTC3 suitable for mobile or wireless applications

reliability of Sensirion’s humidity and temperature sensors

and constant accuracy over a large measurement range,

the SHTC3 offers best performance-to-price ratio. Tape

and reel packaging together with suitability for standard

SMD assembly processes make the SHTC3 predestined

for high-volume applications.

www.sensirion.com Version 0.4 – January 2018 2/13

Important Notice

 All specifications are preliminary and are subject to change without prior notice.

 Design evaluation of this product is ongoing.

 This preliminary data sheet is confidential and must not be distributed to third parties without Sensirion’s

approval.

1 Humidity and Temperature Sensor Specifications

Relative Humidity

Parameter

Conditions

Value

Units

Accuracy tolerance

Typ.

2.0

%RH

Max.

see Figure 2

%RH

Repeatability

0.1

%RH

Resolution

0.01

%RH

Hysteresis

1

%RH

Specified range

extended

0 to 100

%RH

Response time

 63%

Long-term drift

Typ.

<0.25

%RH/y

Table 1 Humidity sensor specifications.

Figure 2 Typical and maximal tolerance for relative humidity in %RH

at 25 °C.

For definition of typ. and max. accuracy tolerance, please refer to the document

“Sensirion Humidity Sensor Specification Statement”. Specification applies to

normal mode.

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. Specification applies to normal mode.

Resolution of A/D converter. Specification applies to normal mode.

Specified range refers to the range for which the humidity or temperature sensor

specification is guaranteed.

For details about recommended humidity and temperature operating range, please

refer to section 1.2.

Temperature

Parameter

Conditions

Value

Units

Accuracy tolerance

Typ.

0.2

°C

Max.

see Figure 3

°C

Repeatability

0.1

°C

Resolution

0.01

°C

Specified range

–40 to +125

°C

Response time

 63%

<5 to 30

Long-term drift

Typ.

<0.02

°C/y

Table 2 Temperature sensor specifications.

Figure 3 Typical and maximal tolerance for temperature sensor in

°C.

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.

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.

Temperature response time depends on heat conductivity of sensor

substrate and design-in of sensor in application.

Max. value is < 0.04°C/y.

±0

±2

±4

±6

0 10 20 30 40 50 60 70 80 90 100

ΔRH [%RH]

Relative humidity [%RH]

Maximum accuracy

Typical Accuracy

±0

±0.2

±0.4

±0.6

±0.8

±1

±1.2

±1.4

-40 -20 0 20 40 60 80 100 120

ΔT [C]

Temperature [°C]

Maximum Accuracy

Typical Accuracy

www.sensirion.com Version 0.4 – January 2018 3/13

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°C … 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

SHTC.

2 Electrical Specifications

2.1 Electrical Characteristics

Default conditions of 25 °C and 3.3 V supply voltage apply to values in the table below, unless otherwise stated.

Parameter

Symbol

Conditions

Min

Typ.

Max

Units

Comments

Supply voltage

1.62

3.3

3.6

Power-up/down level

POR

Static power supply

1.28

1.4

1.55

Supply current

Idle state

µA

After power-up the sensor is in

the idle state unless it is sent to

sleep mode or other data

transmission is active.

Sleep Mode

0.3

0.6

µA

The sensor needs a dedicated

wake-up command before being

able to do other transmission

Measurement

Normal Mode

430

900

µA

Average current consumption

while sensor is measuring

Low Power M.

270

570

µA

Average

Normal Mode

4.9

µA

Average current consumption

(high resolution, continuous

operation with one

measurement per second)

Low Power M.

0.5

µA

Average current consumption

(low resolution, continuous

operation with one

measurement per second)

Average power

consumption

Average

Normal Mode

16.3

µW

Average power consumption

(continuous operation with one

measurement per second)

Low Power M.

1.6

Low level input voltage

0.42 V

High level input voltage

0.7 V

Low level output voltage

3 mA sink current

0.2 V

Table 3 Electrical specifications.

100 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3.5 ±4 ±4

90 ±3.5 ±3 ±2.5 ±2.5 ±2.5 ±2.5 ±3 ±3.5 ±4

80 ±3 ±2.5 ±2 ±2 ±2 ±2.5 ±2.5 ±3 ±3.5

70 ±3 ±2.5 ±2 ±2 ±2 ±2 ±2.5 ±2.5 ±3

60 ±2.5 ±2 ±2 ±2 ±2 ±2 ±2 ±2.5 ±2.5

50 ±2.5 ±2 ±2 ±2 ±2 ±2 ±2 ±2 ±2.5

40 ±2.5 ±2 ±2 ±2 ±2 ±2 ±2 ±2 ±2

30 ±2.5 ±2 ±2 ±2 ±2 ±2 ±2 ±2 ±2

20 ±2.5 ±2.5 ±2 ±2 ±2 ±2 ±2 ±2 ±2

10 ±3 ±3 ±2.5 ±2.5 ±2.5 ±2.5 ±2.5 ±2.5 ±2.5

0 ±3.5 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3

0 10 20 30 40 50 60 70 80

Relative Humidity [%RH]

Temperature [°C]

剩余12页未读，继续阅读

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