Datasheet SHTC3 Humidity and Temperature Sensor IC Ultra-low power consumption Full battery supply voltage range (1.62 - 3.6 V) Small DFN package: 2 x 2 x 0.75 mm3 Typical accuracy: 2 %RH and 0.2 C Fully calibrated and reflow solderable Power-up and measurement within 1 ms Product Summary The SHTC3 is a digital humidity and temperature sensor designed especially for battery-driven 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(R) 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 I2C Fast Mode Plus. The small 2 x 2 x 0.75 mm3 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 0.2C. The broad supply voltage of 1.62 V to 3.6 V and an energy budget below 1 J per measurement make the SHTC3 suitable for mobile or wireless applications powered by batteries. With the industry-proven quality and 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. Benefits of Sensirion's CMOSens(R) 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 Block diagram RH sensor T sensor Signal conditioning Signal conditioning 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 .......................................... 11 www.sensirion.com analog ADC digital Data processing and system control Calibration mem. VDD VSS I2C interface SDA SCL Figure 1 Functional block diagram of the SHTC3. Version 1 - July 2018 1/13 1 Humidity and Temperature Sensor Specifications Relative Humidity Parameter Accuracy tolerance1 Temperature Condition Value Unit Typ. 2.0 see Figure 2 0.1 0.01 %RH 1 0 to 100 %RH Resolution3 Specified range4 %RH Response time8 8 s Long-term drift <0.25 %RH/y Max. - Repeatability2 Resolution3 Hysteresis - Specified range4 extended5 Response time6 63% Typ. Long-term drift7 %RH %RH %RH Parameter Accuracy tolerance1 Repeatability2 Condition Value Unit Typ. 0.2 see Figure 3 0.1 0.01 -40 to +125 C <5 to 30 s <0.02 C/y Max. 63% Typ. 9 C C C C Table 2 Temperature sensor specifications. Table 1 Humidity sensor specifications. T [C] RH [%RH] 1.6 Maximum Accuracy Maximum accuracy 6 Typical Accuracy Typical Accuracy 1.2 4 0.8 2 0.4 0 0 10 20 30 40 50 60 70 80 90 100 0 -40 Relative humidity [%RH] 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. 2 The stated repeatability is 3 times the standard deviation (3) 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. 3 Resolution of A/D converter. Specification applies to normal mode. 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 1.2. 1 www.sensirion.com -20 0 20 40 60 80 100 120 Temperature [C] Figure 3 Typical and maximal tolerance for temperature sensor in C. Time for achieving 63% of a humidity step function, valid at 25C 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, outgassing 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 < 0.04C/y. 6 Version 1 - July 2018 2/13 1.2 Recommended Operating Conditions Typical RH accuracy at 25C is defined in Figure 2. For other temperatures, typical accuracy has been evaluated to be as displayed in Figure 4. The sensor performs best when operated within the recommended normal temperature and humidity range of 5 - 60 C and 20 - 80 %RH, respectively. Long-term exposure to conditions outside the normal range, especially at high humidity, may temporarily offset the RH signal (e.g. +3%RH after 60h at >80%RH). After returning to normal temperature and humidity range the sensor will slowly come back to its calibration state by itself. Prolonged exposure to extreme conditions may accelerate ageing. Relative Humidity [%RH] 1.1 RH Accuracy at Various Temperatures 100 90 80 70 60 50 40 30 20 10 0 3.5 3.5 3 3 2.5 2.5 2.5 2.5 2.5 3 3.5 3 3 2.5 2.5 2 2 2 2 2.5 3 3.5 3 2.5 2 2 2 2 2 2 2 2.5 3 0 10 20 3 2.5 2 2 2 2 2 2 2 2.5 3 3 2.5 2 2 2 2 2 2 2 2.5 3 3 2.5 2.5 2 2 2 2 2 2 2.5 3 3.5 3 2.5 2.5 2 2 2 2 2 2.5 3 30 40 50 60 Temperature [C] 4 3.5 3 2.5 2.5 2 2 2 2 2.5 3 4 4 3.5 3 2.5 2.5 2 2 2 2.5 3 70 80 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 SHTC3. Figure 4 Typical accuracy of relative humidity measurements given in %RH for temperatures 0C ... 80C. 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 Supply voltage Power-up/down level Supply current Symbol VDD VPOR IDD Conditions Min 1.62 1.28 Typ. 3.3 1.4 Max 3.6 1.55 Idle state - 45 70 Sleep Mode - 0.3 0.6 Normal Mode Low Power M. - 430 270 900 570 Normal Mode - 4.9 - Low Power M. - 0.5 - 0.7 VDD - - 0.42 VDD 0.2 VDD Static power supply Measurement Average Low level input voltage High level input voltage Low level output voltage VIL VIH VOL 3 mA sink current Units Comments V V After power-up the sensor remains in the idle state unless A a sleep command is issued or other data transmission is active When in sleep mode, the sensor requires a dedicated wake-up A command to enable further I2C communication A Average current consumption A while the sensor is measuring Average current consumption A (continuous operation with one measurement per second) Average current consumption A (continuous operation with one measurement per second) V V V - Table 3 Electrical specifications. www.sensirion.com Version 1 - July 2018 3/13 2.2 Absolute Maximum Ratings Stress levels beyond the limits 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. Parameters are only tested each at a time. Parameter Supply voltage, VDD Operating temperature range Storage temperature range10 ESD HBM (human body model)11 ESD CDM (change device model)12 Latch up, JESD78 Class II, 125C Rating -0.3 to +4 V -40 to +125 C -40 to +125 C -2 to 2 kV -500 to 500 V -100 to 100 mA Table 4 Absolute maximum ratings. 3 Timing Specifications 3.1 Sensor System Timings Default conditions of 25 C and 3.3 V supply voltage apply to values the table below, unless otherwise stated. Max. values are measured at -40 C. Parameter Symbol Conditions Min. Typ. Max. Power-up time tPU After hard reset, VDD VPOR - 180 240 Soft reset time tSR After soft reset. - 180 240 Measurement duration tMEAS Average - 10.8 0.7 12.1 0.8 Normal Mode Low Power M. Units Comments Time between VDD reaching VPU s and sensor entering the idle state Time between ACK of soft reset s command and sensor entering the idle state ms Duration for a humidity and temperature measurement Table 5 System timing specifications. The recommended storage temperature range is 10-50C. Please consult the document "SHTxx Handling Instructions" for more information. According to ANSI/ESDA/JEDEC JS-001-2014; AEC-Q100-002. 12 According to ANSI/ESD S5.3.1-2009; AEC-Q100-011. 10 11 www.sensirion.com Version 1 - July 2018 4/13 3.2 Communication Timings Default conditions of 25 C and 3.3 V supply voltage apply to values in the table below, unless otherwise stated. Parameter SCL clock frequency Hold time (repeated) START condition LOW period of the SCL clock HIGH period of the SCL clock Set-up time for a repeated START condition SDA hold time SDA set-up time SCL/SDA rise time SCL/SDA fall time SDA valid time Set-up time for STOP condition Capacitive load on bus line Symbol fSCL Min. 0 Typ. - Max. 1 260 - - ns - tLOW tHIGH Conditions After this period, the first clock pulse is generated - 500 260 - - ns ns - tSU;STA - 260 - - ns - tHD;DAT tSU;DAT tR tF tVD;DAT - 0 50 - - 120 120 400 ns ns ns ns - tSU;STO - 260 - - ns - CB - - - 550 pF - tHD;STA Units Comments MHz - Table 6 Communication timing specifications. The numbers above are values according to the I2C Fast Mode Plus specification. 1/fSCL tHIGH tR tLOW tF 70% SCL tSU;DAT 30% tHD;DAT DATA IN 70% SDA 30% tVD;DAT DATA OUT tF tR 70% SDA 30% Figure 5 Timing diagram for digital input/output pads. SDA directions as 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. www.sensirion.com Version 1 - July 2018 5/13 4 Interface Specifications The SHTC3 supports I2C Fast Mode Plus (SCL clock frequency from 0 to 1 MHz) with clock stretching. For detailed information on the I2C protocol, refer to NXP I2Cbus specification and user manual UM10204, Rev. 6, April 4th, 2014. The SHTC3 comes in a 4-pin package - see Table 7. Pin Name Comments 1 VDD Supply voltage 2 SCL Serial clock, bidirectional 3 SDA Serial data, bidirectional 4 VSS Ground 1 2 SHTC3 4 3 AXY89 Table 7 SHTC3 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 the microcontroller and the sensor. The master must keep the clock frequency within 0 to 1 MHz as specified in Table 6. The SHTC3 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 I2C manual must be met. To avoid signal contention, the microcontroller must only drive SDA and SCL low. External pull-up resistors (e.g. 10 k) are required to pull the signal high. For dimensioning resistor sizes please take the bus capacity requirements into account. Note that pull-up resistors may be included in I/O circuits of microcontrollers. VDD MCU (master) RP SHTC3 (slave) RP SDA C = 100 nF SDA IN SDA OUT 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 additionally. 5 Operation and Communication All commands and memory locations of the SHTC3 are mapped to a 16-bit address space which can be accessed via the I2C protocol. 5.1 I2C Address The I2C device address is given Table 8: SHTC3 I2C address GND Figure 6 Typical application circuit, including pull-up resistors RP and decoupling of VDD and VSS by a capacitor. For good performance of the SHTC3 in the application, the center pad of the SHTC3 offers the best thermal contact to Hex. Code Bin. Code 0x70 111'0000 Table 8 SHTC3 I2C device address. Each transmission sequence begins with START condition (S) and ends with an (optional) STOP condition (P) as described in the I2C-bus specification. 5.2 Power-Up, Sleep, Wakeup Upon VDD reaching the power-up voltage level VPOR, the SHTC3 enters the idle state after a duration of tPU. After that, the sensor should be set to sleep mode with the command given in Table 913. Command Sleep Hex. Code 0xB098 Bin. Code 1011'0000'1001'1000 Table 9 Sleep command of the sensor. When the sensor is in sleep mode, it requires the following wake-up command before any further communication, see Table 10: Command Wakeup SHTC3 SCL AXY89 SCL IN SCL OUT the temperature sensor. For more information on design-in, please refer to the document "SHTxx Design Guide". Hex. Code 0x3517 Bin. Code 0011'0101'0001'0111 Table 10 Wake-up command of the sensor. 5.3 Measurement Commands The SHTC3 provides a clock-stretching option and the order of the signal return can be selected. These parameters are selected by dedicated measurement commands as summarized in Table 11. N. B.: Each measurement command triggers always both, a temperature and a relative humidity measurement. If an immediate sensor signal is desired, sending the sensor to sleep mode can be omitted. Not sending the sensor to sleep mode for an extended amount of time keeps up the current consumption of the sensor. 13 www.sensirion.com Version 1 - July 2018 6/13 Clock Stretching Enabled Read T Read RH First First 5.4 Measuring and Reading the Signals Clock Stretching Disabled Read T Read RH First First Normal Mode 0x7CA2 0x5C24 0x7866 0x58E0 Low Power M. 0x6458 0x44DE 0x609C 0x401A Each measurement cycle contains a set of four commands, each initiated by the I2C START condition and ended by the I2C STOP condition: 1. Wakeup command 2. Measurement command 3. Read out command Table 11 Measurement commands. 4. Sleep command An exemplary measurement set is shown in Figure 7 8 9 S 1 1 1 0 0 0 0 0 10 30 31 32 33 34 35 1 1 1 0 0 0 0 0 36 I2C address + write clock stretching disabled 13 14 15 16 17 18 19 38 39 40 41 42 43 44 57 45 0 1 0 1 1 1 0 0 58 59 60 61 62 63 S 1 1 1 0 0 0 0 1 21 22 23 24 25 26 27 Wakeup command LSB 46 Measurement command MSB 56 20 0 0 0 1 0 1 1 1 Wakeup command MSB ACK S 29 12 0 0 1 1 0 1 0 1 I2C address + write 28 11 47 48 49 50 51 52 53 P SHTC3 wake up Wakeup time see Table 5 54 0 0 1 0 0 1 0 0 55 Measurement command LSB P SHTC3 measuring Measurement in progress 64 65 P SHTC3 measuring SHTC3 in idle state measurement cont'd measurement completed repeated I2C address + read while meas. is in prog. (polling) 66 67 68 69 70 71 72 S 1 1 1 0 0 0 0 1 73 ACK 7 ACK 6 ACK 5 ACK 4 ACK 3 NACK 2 ACK 1 I2C address + read 56 57 58 59 60 61 62 63 64 S 1 1 1 0 0 0 0 1 SHTC3 measuring, SCL line pulled low ACK clock stretching enabled I2C address + read while meas. is in progress measurement continued Humidity MSB 0 0 0 1 1 1 0 0 Humidity LSB ACK 0 0 1 1 0 0 1 1 ACK 1 0 1 0 0 0 0 1 ACK 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 Humidity CRC checksum Temperature MSB Temperature LSB 1 1 0 0 0 1 1 1 ACK 1 0 0 0 1 0 1 1 ACK 0 1 1 0 0 1 0 0 ACK 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 P Temperature CRC checksum I2C address + write Sleep command MSB 1 0 0 1 1 0 0 0 ACK 1 0 1 1 0 0 0 0 ACK S 1 1 1 0 0 0 0 0 ACK 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 P Sleep command LSB Figure 7 Communication sequence for waking up the sensor, 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 63 %RH and 23.7 C. Clear blocks are controlled by the microcontroller, grey blocks by the SHTC3. www.sensirion.com Version 1 - July 2018 7/13 5.5 Sensor Behavior during Measurement and Clock Stretching sensor to reset all internal state machines and reload calibration data from the memory. In general, the sensor does not respond to any I2C activity during measurement, i.e. I2C 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 SHTC3 is measuring. For more information, see the application note "Optimization of Repeatibility". Command Software reset The I2C 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. 5.7 Soft Reset 5.8 Reset through General Call Additionally, a reset of the sensor can also be generated using the "general call" mode according to I2C-bus specification14. This generates a reset which is functionally identical to using the nReset pin. It is important to understand that a reset generated in this way is not device specific. All devices on the same I2C bus that support the general call mode will perform a reset. Additionally, this command only works when the sensor is able to process I2C commands. The appropriate command consists of two bytes and is shown in Table 13. Command Address byte Second byte Reset command using the general call address 1 2 3 4 5 6 7 8 S General Call Address General Call 1st byte 9 1 Code 0x00 0x06 0x0006 2 3 4 5 6 7 Reset Command 8 9 ACK 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 I2C 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 SHTC3 does not receive an ACK from the master after any byte of data, it will not continue sending data. Bin. Code 1000'0000'0101'1101 Table 12 Soft reset command. ACK 5.6 Readout of Measurement Results Hex. Code 0x805D General Call 2nd byte Table 13 Reset through the general call address (clear blocks are controlled by the microcontroller, grey blocks by the sensor) 5.9 Read-out of ID Register The SHTC3 has an ID register which contains an SHTC3specific 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 14. Command Read ID register Hex. Code 0xEFC8 Bin. Code 1110'1111'1100'1000 Table 14 Read-out command of ID register. It needs to be sent to the SHTC3 after an I2C write header. Once the SHTC3 has acknowledged the proper reception of the command, the master can send an I2C read header and the SHTC3 submits the 16-bit ID followed by 8 bits of CRC. The structure of the ID is described in Table 15. The SHTC3 provides a soft reset mechanism that forces the system into a well-defined state without removing the power supply. If the system is in its idle state (i.e. if no measurement is in progress) the soft reset command can be sent to SHTC3 according to Table 12. This triggers the 14 http://www.nxp.com/documents/user_manual/UM10204.pdf www.sensirion.com Version 1.0 - July 2018 8/13 6.2 Material Contents 16-bit ID bits 15 to 12 & 10 to 6: unspecified info. The device is fully RoHS, REACH and Halogen-Free compliant, e.g. free of Pb, Cd, and Hg. 7 xxxx' 1 xxx'xx 00'0111 bits 11 & 5 to 0: SHTC3 identifier. Table 15 Structure of the 16-bit ID. Bits 15:12 & 10:6 of the ID contain unspecified information (marked as "x"), which may vary from sensor to sensor, while bits 11 & 5:0 contain the SHTC3specific product code. 5.10 Checksum Calculation The 8-bit CRC checksum transmitted after each data word is generated by a CRC algorithm with the properties displayed in Table 16. The CRC covers the contents of the two previously transmitted data bytes. Property Value Name Width Polynomial Initialization Reflect input Reflect output Final XOR Examples CRC-8 8 bits 0x31 (x8 + x5 + x4 + 1) 0xFF False False 0x00 CRC (0x00) = 0xAC CRC (0xBEEF) = 0x92 SHTC3 sensors are provided in a DFN package with an outline of 2 x 2 x 0.75 mm3 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 an epoxy-based mold compound. Please note that the sidewalls 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 SHTC3 is MSL1, according to IPC/JEDEC J-STD-020. All SHTC3 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 (SHTC3), the bottom line contains a 5-digit, alphanumeric tracking code. The pin-1 indicator is located in the top left corner. See Figure 8 for illustration. SHTC3 Table 16 SHTC3 I2C CRC properties. XXXXX 5.11 Conversion of Sensor Output Measurement data is always transferred as 16-bit values. These values are already linearized and temperature compensated by the SHTC3. Humidity and temperature values can be calculated with the formulas in given below. Relative humidity conversion formula (result in %RH): S RH 100 RH 2 16 Temperature conversion formula (result in C): S T 45 175 16T 2 SRH and ST denote the raw sensor output (as decimal values) for humidity and temperature, respectively. 6 Packaging and Traceability Figure 8 Laser marking on SHTC3, 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 SHTC3 can be ordered in tape and reel packaging with different sizes, see Table 17. The reels are sealed into antistatic ESD bags. A drawing of the packaging tape with sensor orientation is shown in Figure 11. Quantity Packaging Reel Diameter 2500 Tape & Reel 180 mm (7 inch) 10'000 Tape & Reel 330 mm (13 inch) Order Number 3.000.047 1-101681-01 Table 17 SHTC3 ordering options. Quality 6.1 Environmental Stability Qualification of the SHTC3 is performed based on the JEDEC JESD47 qualification test method. www.sensirion.com Version 1 - July 2018 9/13 9 Technical Drawings 9.1 Package Outline 2 0.2x45 1 0.35 0.7 0.35 0.75 1.6 2 * Mold opening shows smooth transition to package surface. Therefore this dimension is not well defined and given for reference only. Figure 9 Package outline drawing of the SHTC3. Dimensions are given in millimeters. 9.2 Metal Land Pattern Figure 10 Recommended metal land pattern for SHTC3 (all dimensions are in mm). Recommended solder paste stencil thickness is 100m, pads on PCB are recommended to be non solder mask defined (NSMD). www.sensirion.com Version 1 - July 2018 10/13 9.3 Tape and Reel Package Figure 11 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. 10 Further Information For more in-depth information on the SHTC3 and its application please consult the following documents: Document Name SHTxx Assembly of SMD Packages SHTxx Design Guide SHTxx Handling Instructions Sensirion Humidity Sensor Specification Statement Description Source Available for download from the SHTC3 product Instructions on soldering and processing of the website: SHTC3 in a production environment www.sensirion.com/humidity-download Available for download at the Sensirion humidity Design guidelines for designing SHTxx humidity sensors download center: sensors into applications www.sensirion.com/humidity-download Available for download at the Sensirion humidity Guidelines for proper handling of SHTxx humidity sensors download center: sensors www.sensirion.com/humidity-download Available for download at the Sensirion humidity Definition of sensor specifications. sensors download center: www.sensirion.com/humidity-download Table 18 Documents containing further information relevant for the SHTC3. www.sensirion.com Version 1 - July 2018 11/13 Revision History Date July 2018 www.sensirion.com Version 1 Page(s) all Changes Initial version Version 1 - July 2018 12/13 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 (c) 2018, by SENSIRION. CMOSens(R) is a trademark of Sensirion All rights reserved Headquarters and Subsidiaries SENSIRION AG Laubisruetistr. 50 CH-8712 Staefa ZH Switzerland Sensirion Inc. USA phone: +1 312 690 5858 info-us@sensirion.com www.sensirion.com Sensirion Korea Co. Ltd. phone: +82 31 337 7700~3 info-kr@sensirion.com www.sensirion.co.kr phone: +41 44 306 40 00 fax: +41 44 306 40 30 info@sensirion.com www.sensirion.com Sensirion Japan Co. Ltd. phone: +81 3 3444 4940 info-jp@sensirion.com www.sensirion.co.jp Sensirion China Co. Ltd. phone: +86 755 8252 1501 info-cn@sensirion.com www.sensirion.com.cn/ Sensirion Taiwan Co. Ltd. phone: +41 44 306 40 00 To find your local representative, please visit www.sensirion.com/contact info@sensirion.com www.sensirion.com Version 1 - July 2018 13/13