SHT85

Datasheet SHT85 Humidity and Temperature Sensor ▪ High-accuracy RH&T sensor for demanding measurement & test applications ▪ Typical accuracy of  1.5 %RH and  0.1 °C ▪ Pin-type packaging for easy integration and replacement ▪ Fully calibrated, linearized, and temperature compensated digital output ▪ On-package membrane protected by exclusive license for several patents1 Product Summary SHT85 is Sensirion’s best-in-class humidity sensor with pin-type connector for easy integration and replacement. It builds on a highly accurate and long-term stable SHT3x sensor that is at the heart of Sensirion’s new humidity and temperature platform. The unique package design allows for the best possible thermal coupling to the environment and decoupling from potential heat sources on the main board. The SHT85 features a PTFE membrane dedicated to protect the sensor opening from liquids and dust according to IP67, without affecting the response time of the RH signal. It thus allows for sensor use under harsh environmental conditions, (such as spray water and high exposure to dust). Sensirion holds an exclusive license for several patents for employing an on-package filter membrane on a humidity sensor1. Final accuracy testing on product level ensures best performance, making the SHT85 the ultimate choice for even the most demanding applications. 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 1 EP 1810013 B1; US 7,741,950; CN 101040181 B www.sensirion.com Version 3 – August 2020 1/23 Content 1 Humidity and Temperature Sensor Specifications 3 2 Electrical Specifications 6 3 Pin Assignment 8 4 Operation and Communication 9 5 Packaging 18 6 Shipping Package 20 7 Quality 21 8 Ordering Information 21 9 Further Information 21 10 Revision History 22 www.sensirion.com Version 3 – August 2020 2/23 1 Humidity and Temperature Sensor Specifications Relative Humidity Parameter Accuracy tolerance2 Repeatability3 Resolution Hysteresis range4 Specified Response time6 Long-term drift8 Conditions Typ. Value 1.5 see Figure 1 0.21 0.15 0.08 0.01 Max. Low, typ. Medium, typ. High, typ. Typ. At 25°C Non-condensing environment5  63% Typ. 0.8 0 to 100 87 Units %RH %RH %RH %RH %RH %RH %RH s 2 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 SHT85. www.sensirion.com Version 3 – August 2020 5/23 2 Electrical Specifications 2.1 Electrical Characteristics Parameter Supply voltage Power-up/down level Slew rate change of the supply voltage Symbol Conditions VDD VPOR VDD,slew Supply current IDD Heater Power PHeater Min 2.15 1.8 - Typ. 3.3 2.1 - Max 5.5 2.15 20 Idle state (single shot mode) T= 25°C Idle state (single shot mode) T= 125°C Idle state (periodic data acquisition mode) 0.2 12.0 Measurement Units V V V/ms µA - 6.0 45 - µA - 600 1500 µA Average - 1.7 - µA Heater running 3.6 - 33 mW Comments Voltage changes on the VDD line between VDD,min and VDD,max should be slower than the maximum slew rate; faster slew rates may lead to reset; Current when sensor is not performing a measurement during single shot mode Current when sensor is not performing a measurement during periodic data acquisition mode Current consumption while sensor is measuring Average current consumption (operation with one measurement per second at lowest repeatability, single shot mode) Depending on the supply voltage Table 3: Electrical specifications, typical values are valid for T=25°C, min. & max. values for T=-40°C … 125°C. 2.2 Timing Specifications Parameter Power-up time Soft reset time Measurement duration Symbol Conditions Min. tPU After hard reset, VDD ≥ VPOR tSR After soft reset. - Typ. 0.5 Max. 1.5 Units ms 0.5 1.5 ms tMEAS,l tMEAS,m tMEAS,h 2.5 4.5 12.5 4.5 6.5 15.5 ms ms ms Low repeatability Medium repeatability High repeatability - Comments Time between VDD reaching VPU and sensor entering idle state Time between ACK of soft reset command and sensor entering idle state The three repeatability modes differ with respect to measurement duration, noise level and energy consumption. Table 4: System timing specifications, valid from -40 °C to 125 °C and VDDmin to VDDmax. www.sensirion.com Version 3 – August 2020 6/23 2.3 Absolute Minimum and Maximum Ratings Stress levels beyond those listed in Table 5 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. Ratings are only tested each at a time. Parameter Supply voltage, VDD Max voltage on pins (pin 1 (SCL); pin 4 (SDA); Input current on any pin Operating temperature range Storage temperature range11 ESD HBM (human body model)12 ESD CDM (charge device model)13 Rating -0.3 to 6 V -0.3 to VDD+0. V ±100 mA -40 to 105 °C -40 to 105 °C 4 kV 750 V Table 5: Absolute maximum ratings. 11 The recommended storage temperature range is 10-50°C. Please consult the document “SHTxx Handling Instructions” for more information. According to ANSI/ESDA/JEDEC JS-001-2014; AEC-Q100-002. 13 According to ANSI/ESD S5.3.1-2009; AEC-Q100-011. 12 www.sensirion.com Version 3 – August 2020 7/23 3 Pin Assignment The SHT85 comes with a 4-pin-type connector, see Table 6. Pin Name 1 2 3 4 SCL VDD VSS SDA Comments Serial clock; input only Supply voltage; input Ground Serial data; input / output Table 6: SHT85 pin assignment (transparent top view). The die pad is internally connected to VSS. 3.1 Power Pins (VDD, VSS) The electrical specifications of the SHT85 are shown in Table 3. Decoupling of VDD and VSS by a 100nF capacitor is integrated on the front side of the sensor packaging. See Figure 4 for a typical application circuit. Figure 4: Typical application circuit 3.2 Serial Clock and Serial Data (SCL, SDA) SCL is used to synchronize the communication between microcontroller and the sensor. The clock frequency can be freely chosen between 0 to 1000 kHz. The SDA pin is used to transfer data to and from the sensor. Communication with frequencies up to 400 kHz must meet the I2C Fast Mode14 standard. Communication frequencies up to 1 Mhz are supported following the specifications given in Table 20. 14 http://www.nxp.com/documents/user_manual/UM10204.pdf www.sensirion.com Version 3 – August 2020 8/23 4 Operation and Communication The SHT85 supports I2C fast mode (and frequencies up to 1000 kHz). For detailed information on the I2C protocol, refer to NXP I2C-bus specification15. After sending a command to the sensor a minimal waiting time of 1ms is needed before another command can be received by the sensor. Furthermore, to keep self-heating below 0.1°C, SHT85 should not be active for more than 10% of the time. All SHT85 commands and data are mapped to a 16-bit address space. Additionally, data and commands are protected with a CRC checksum. This increases communication reliability. The 16 bits commands to the sensor already include a 3 bit CRC checksum. Data sent from and received by the sensor is always succeeded by an 8 bit CRC. In write direction it is mandatory to transmit the checksum, since the SHT85 only accepts data if it is followed by the correct checksum. In read direction it is left to the master to read and process the checksum. 4.1 I2C Address The I2C device address is given in Table 7: SHTC85 I2C device address. SHT85 address I2C Hex. Code 0x44 Bin. Code 100’0100 Table 7: SHTC85 I2C device address. 4.2 Power-Up and Communication Start The sensor starts powering-up after reaching the power-up threshold voltage VPOR specified in Table 3. After reaching this threshold voltage the sensor needs the time tPU to enter idle state. Once the idle state is entered it is ready to receive commands from the master (microcontroller). Each transmission sequence begins with a START condition (S) and ends with a 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. This idle state cannot be controlled by the user. 4.3 Starting a Measurement A measurement communication sequence consists of a START condition, the I2C write header (7-bit I2C device address plus 0 as the write bit) and a 16-bit measurement command. The proper reception of each byte is indicated by the sensor. It pulls the SDA pin low (ACK bit) after the falling edge of the 8th SCL clock to indicate the reception. A complete measurement cycle is depicted in Table 8. With the acknowledgement of the measurement command, the SHT85 starts measuring humidity and temperature. 4.4 Measurement Commands for Single Shot Data Acquisition Mode In this mode one issued measurement command triggers the acquisition of one data pair. Each data pair consists of one 16-bit temperature and one 16-bit humidity value (in this order). During transmission each data value is always followed by a CRC checksum, see Section 4.5. In single shot mode different measurement commands can be selected. The 16-bit commands are shown in Table 8. They differ with respect to repeatability (low, medium and high). 15 http://www.nxp.com/documents/user_manual/UM10204.pdf www.sensirion.com Version 3 – August 2020 9/23 The repeatability setting influences the measurement duration and thus the overall energy consumption of the sensor. This is explained in Section 2. Hex. code MSB LSB W Command MSB I2C write header P 16-bit command I2C Address P S I2C Address R I2C read header Temperature LSB Humidity LSB CRC Checksum ACK Humidity MSB ACK 16-bit temperature value ACK ACK measurement completed 16-bit humidity value CRC NACK SCL free Temperature MSB R I2C read header ACK S measurement ongoing: no read header for 1ms measurement ongoing 00 0B 16 Command LSB ACK SCL free ACK I2C Address NACK S ACK High Medium 0x24 Low e.g. 0x2400: high repeatability measurement. ACK Condition Repeatability P Checksum Table 8: Measurement commands in single shot mode. The first “SCL free” block indicates a minimal waiting time of 1ms. (Clear blocks are controlled by the microcontroller, grey blocks by the sensor). 4.5 Readout of Measurement Results for Single Shot Mode After the sensor has completed the measurement, the master can read the measurement results (pair of RH & T) by sending a START condition followed by an I2C read header. The sensor responds to a read header with a not acknowledge (NACK), if the measurement is still ongoing and thus no data is present. If the measurement is completed, the sensor will acknowledge the reception of the read header and send two bytes of data (temperature) followed by one byte CRC checksum and another two bytes of data (relative humidity) 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 sensor does not receive an ACK from the master after any byte of data, it will not continue sending data. The sensor will send the temperature value first and then the relative humidity value. After having received the checksum for the humidity value a NACK and stop condition should be sent (see Table 8). 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 two temperature bytes of data with the CRC byte (without processing the CRC data); after having read the two humidity bytes, the read transfer can be aborted with a with a NACK. www.sensirion.com Version 3 – August 2020 10/23 4.6 Measurement Commands for Periodic Data Acquisition Mode In this mode one issued measurement command yields a stream of data pairs. Each data pair consists of one 16-bit temperature and one 16-bit humidity value (in this order). In periodic mode different measurement commands can be selected. The corresponding 16-bit commands are shown in Table 9. They differ with respect to repeatability (low, medium and high) and data acquisition frequency (0.5, 1, 2, 4 & 10 measurements per second, mps). The data acquisition frequency and the repeatability setting influences the measurement duration and the current consumption of the sensor. This is explained in Section 2 of this datasheet. If a measurement command is issued, while the sensor is busy with a measurement (measurement durations see Table 4), it is recommended to issue a break command first (see Section 4.9). Upon reception of the break command the sensor will abort the ongoing measurement and enter the single shot mode. Condition Repeatability mps Hex. code MSB LSB High 32 Medium 0.5 0x20 24 Low 2F High 30 Medium 1 0x21 26 Low 2D High 36 Medium 2 0x22 20 Low 2B High 34 Medium 4 0x23 22 Low 29 High 37 Medium 10 0x27 21 Low 2A e.g. 0x2130: 1 high repeatability mps - measurement per second 4 5 6 I2C Address I2C write header 7 8 9 W 1 2 3 4 5 6 7 Command MSB 8 9 10 11 12 13 14 15 16 17 18 Command LSB ACK 3 ACK S 2 ACK 1 16-bit command Table 9: Measurement commands for periodic data acquisition mode (Clear blocks are controlled by the microcontroller, grey blocks by the sensor). N.B.: At the highest mps setting self-heating of the sensor might occur. 4.7 Readout of Measurement Results for Periodic Mode Transmission of the measurement data can be initiated through the fetch data command shown in Table 10. If no measurement data is present the I2C read header is responded with a NACK (Bit 9 in Table 10) and the communication stops. After the read out command fetch data has been issued, the data memory is cleared, i.e. no measurement data is present. www.sensirion.com Version 3 – August 2020 11/23 Command Hex code Fetch Data 0x E0 00 Table 10: Fetch Data command (Clear blocks are controlled by the microcontroller, grey blocks by the sensor). 4.8 ART Command The ART (accelerated response time) feature can be activated by issuing the command in Table 11. After issuing the ART command the sensor will start acquiring data with a frequency of 4Hz. The ART command is structurally similar to any other command in Table 9. Hence Section 4.6 applies for starting a measurement, Section 4.7 for reading out data and Section 4.9 for stopping the periodic data acquisition. Command Hex Code Periodic Measurement with ART 0x2B32 4 5 6 7 8 9 W 1 2 3 4 5 6 7 Command MSB I2C write header 8 9 10 11 12 13 14 15 16 17 18 Command LSB ACK 3 ACK 2 I2C Address ACK 1 S 16-bit command Table 11: Command for a periodic data acquisition with the ART feature (Clear blocks are controlled by the microcontroller, grey blocks by the sensor). 4.9 Break command / Stop Periodic Data Acquisition Mode The periodic data acquisition mode can be stopped using the break command shown in Table 12. It is recommended to stop the periodic data acquisition prior to sending another command (except Fetch Data command) using the break command. Upon reception of the break command the sensor will abort the ongoing measurement and enter the single shot mode. This takes 1ms. Command Hex Code Break 0x3093 Table 12: Break command (Clear blocks are controlled by the microcontroller, grey blocks by the sensor). www.sensirion.com Version 3 – August 2020 12/23 4.10 Reset A system reset of the SHT85 can be generated externally by issuing a command (soft reset). Additionally, a system reset is generated internally during power-up. During the reset procedure the sensor will not process commands. Interface Reset If communication with the device is lost, the following signal sequence will reset the serial interface: While leaving SDA high, toggle SCL nine or more times. This must be followed by a Transmission Start sequence preceding the next command. This sequence resets the interface only. The status register preserves its content. Soft Reset / Re-Initialization The SHT85 provides a soft reset mechanism that forces the system into a well-defined state without removing the power supply. When the system is in idle state the soft reset command can be sent to the SHT85. This triggers the sensor to reset its system controller and reloads calibration data from the memory. In order to start the soft reset procedure the command as shown in Table 13 should be sent. It is worth noting that the sensor reloads calibration data prior to every measurement by default. Command Hex Code Soft Reset 0x30A2 Table 13: Soft reset command (Clear blocks are controlled by the microcontroller, grey blocks by the sensor). Reset through General Call Additionally, a reset of the sensor can also be generated using the “general call” mode according to I2C-bus specification15. 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 14. Command Code Address byte Second byte Reset command using the general call address 0x00 0x06 3 4 5 6 7 8 S General Call Address st General Call 1 byte 9 1 2 3 4 5 6 7 Reset Command 8 9 ACK 2 ACK 1 0x0006 General Call 2nd byte Table 14: Reset through the general call address (Clear blocks are controlled by the microcontroller, grey blocks by the sensor). Hard Reset A hard reset is achieved by switching the supply voltage to the VDD Pin off and then on again. In order to prevent powering the sensor over the ESD diodes, the voltage to pins 1 (SCL) and 4 (SDA) also needs to be removed. www.sensirion.com Version 3 – August 2020 13/23 4.11 Heater The SHT85 is equipped with an internal heater, which is meant for plausibility checking only. The temperature increase achieved by the heater depends on various parameters and lies in the range of a few degrees centigrade. It can be switched on and off by command, see table below. The status is listed in the status register. After a reset the heater is disabled (default condition). Command Heater Enable Heater Disabled Hex Code MSB LSB 6D 66 0x30 Table 15: Heater command (Clear blocks are controlled by the microcontroller, grey blocks by the sensor). 4.12 Status Register The status register contains information on the operational status of the heater, the alert mode and on the execution status of the last command and the last write sequence. The command to read out the status register is shown in Table 16 whereas a description of the content can be found in Table 17. Command Hex code Read Out of status register 0xF32D Table 16: Command to read out the status register (Clear blocks are controlled by the microcontroller, grey blocks by the sensor). www.sensirion.com Version 3 – August 2020 14/23 Bit Field description 15 Alert pending status '0': no pending alerts '1': at least one pending alert Reserved Heater status ‘0’ : Heater OFF ‘1’ : Heater ON Reserved RH tracking alert ‘0’ : no alert ‘1’ . alert T tracking alert ‘0’ : no alert ‘1’ . alert Reserved System reset detected '0': no reset detected since last ‘clear status register’ command '1': reset detected (hard reset, soft reset command or supply fail) Reserved Command status '0': last command executed successfully '1': last command not processed. It was either invalid, failed the integrated command checksum Write data checksum status '0': checksum of last write transfer was correct '1': checksum of last write transfer failed 14 13 12 11 10 9:5 4 3:2 1 0 Default value ‘1’ ‘0’ ‘0’ ‘0’ ‘0 ‘0’ ‘xxxxx’ ‘1’ ‘00’ ‘0’ ‘0’ Table 17: Description of the status register. Clear Status Register All flags (Bit 15, 11, 10, 4) in the status register can be cleared (set to zero) by sending the command shown in Table 18. Command Hex Code Clear status register 0x 30 41 Table 18: Command to clear the status register (Clear blocks are controlled by the microcontroller, grey blocks by the sensor). www.sensirion.com Version 3 – August 2020 15/23 4.13 Checksum Calculation The 8-bit CRC checksum transmitted after each data word is generated by a CRC algorithm. Its properties are displayed in Table 19. The CRC covers the contents of the two previously transmitted data bytes. To calculate the checksum only these two previously transmitted data bytes are used. Property Value Name Width Protected data Polynomial Initialization Reflect input Reflect output Final XOR Examples CRC-8 8 bit read and/or write data 0x31 (x8 + x5 + x4 + 1) 0xFF False False 0x00 CRC (0xBEEF) = 0x92 Table 19: I2C CRC properties. 4.14 Conversion of Signal Output Measurement data is always transferred as 16-bit values (unsigned integer). These values are already linearized and compensated for temperature and supply voltage effects. Converting those raw values into a physical scale can be achieved using the following formulas. Relative humidity conversion formula (result in %RH): RH  100  S RH 2 16  1 Temperature conversion formula (result in °C & °F): ST 2 1 S T F    49  315  16 T 2 1 SRH and ST denote the raw sensor output for humidity and temperature, respectively. The formulas work only correctly when SRH and ST are used in decimal representation. T C    45  175  www.sensirion.com 16 Version 3 – August 2020 16/23 4.15 Communication Timing Parameter SCL clock frequency Hold time (repeated) START condition LOW period of the SCL clock HIGH period of the SCL clock Symbol Conditions Min. Typ. Max. Units 0 - 1000 kHz 0.24 - - µs tLOW 0.53 - - µs tHIGH 0.26 - - µs - 250 - 300 300 0.9 ns ns ns ns ns µs fSCL tHD;STA After this period, the first clock pulse is generated SDA hold time tHD;DAT SDA set-up time SCL/SDA rise time SCL/SDA fall time SDA valid time Set-up time for a repeated START condition Set-up time for STOP condition Capacitive load on bus line Low level input voltage High level input voltage Low level output voltage tSU;DAT tR tF tVD;DAT 0 0 100 - tSU;STA 0.26 - - µs tSU;STO 0.26 - - µs CB VIL VIH VOL 0 0.7xVDD - - 400 0.3xVDD 1xVDD 0.4 pF V V V 33 mA sink current Comments Transmitting data Receiving data Table 20: Timing specifications for I2C communication, valid for T=-40°C … 125°C and VDD = VDDmin… VDDmax. The nomenclature above is according to the I2C Specification (UM10204, Rev. 6, April 4, 2014). 1/fSCL tHIGH tR tLOW tF 70% SCL tSU;DAT 30% tHD;DAT DATA IN 70% SDA 30% tVD;DAT tF DATA OUT tR 70% SDA 30% 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. www.sensirion.com Version 3 – August 2020 17/23 5 Packaging The SHT85 is supplied in a single-in-line pin type package. The SHT35-DIS sensor housing consists of an epoxy-based mold compound, see “Datasheet SHT3x-DIS” for more information. The sensor opening of the housing is protected by a PTFE membrane dedicated to protect the sensor opening from liquids and dust according to IP67, see “Datasheet Membrane Option” for more information. The sensor head is connected to the pins by a small bridge to minimize heat conduction and response times. The pins are soldered to the FR4 substrate by lead-free solder paste. The gold plated backside of the sensor head is connected to the VSS pin. A 100nF capacitor is mounted on the front side between VDD and VSS. The device is fully RoHS compliant – thus it is free of of Pb, Cd, Hg, Cr(6+), PBB and PBDE. All pins are Au plated to avoid corrosion. They can be soldered or mate with most 1.27 mm (0.05’’) sockets, for example: Preci-Dip 85187-004-10-001101 / 851-87-004-20-001101, Harwin M50-3030442 or similar. Solder joints and contacts are protected by conformal coating material on front and back side. When the sensor is further processed by soldering, it should be ensured that the solder connections between pins and the SHT85 PCB are not melted. 5.1 Traceability The SHT85 provides a device specific serial number, which can be read-out via the serial interface (I2C), see the command in Table 21. The Serial number allows an unambiguous identification of each individual device. 0x 36 82 4 5 6 7 I2C Address 8 9 W 6 7 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Command MSB I2C write header S 2 3 4 tIDLE 16-bit command 5 I2C Address 8 9 R ACK 1 Command LSB ACK 3 2 ACK S Hex Code ACK 1 Command Get Serial Number I2C read header SNB_2 Serial Number Word 1 CRC ACK SNB_3 ACK 36 ACK 9 Checksum SNB_0 Serial Number Word 2 CRC ACK SNB_1 ACK 63 ACK 37 P Checksum Table 21: Command to read out the Serial Number (Clear blocks are controlled by the microcontroller, grey blocks by the sensor.) After issuing the measurement command and sending the ACK Bit the sensor needs the time t IDLE = 0.5ms to respond to the I2C read header with an ACK Bit. Hence it is recommended to wait tIDLE =0.5ms before issuing the read header. The Get Serial Number command returns 2 words; every word is followed by a CRC Checksum. Together the 2 words (SNB_3 to SNB_0 in Table 21, SNB_0 is the LSB, whereas SNB_3 is the MSB) constitute a unique serial number with a length of 32 bit. This serial number can be used to identify each sensor individually. www.sensirion.com Version 3 – August 2020 18/23 5.2 Package Outline Figure 6: Dimensional drawing of the SHT85 sensor packaging. Dimensions are in mm (1mm = 0.039 inch). Not shown: Conformal coating. www.sensirion.com Version 3 – August 2020 19/23 6 Shipping Package SHT85 are shipped in 32mm tape at 50pcs each. Dimensions of packaging tape are given in Figure 7. All tapes have a 10 pockets empty leader tape (first pockets of the tape) and a 10 pockets empty trailer tape (last pockets of the tape). Figure 7 Tape configuration and unit orientation within tape, dimensions in mm (1mm = 0.039inch). www.sensirion.com Version 3 – August 2020 20/23 7 Quality Qualification of the SHT85 is performed based on JEDEC guidelines. The qualification of the SHT3x-DIS component itself is based on the JEDEC JESD47 qualification test method. 7.1 Material Contents The device is fully RoHS compliant, e.g. free of Pb, Cd, and Hg. 8 Ordering Information The SHT85 can be ordered in tape and reel packaging, see Table 22. The reels are sealed into antistatic ESD bags. Sensor Type Packaging Quantity Order Number SHT85 Tape Stripes 50 3.000.485 Table 22 SHT85 ordering information. 9 Further Information For more in-depth information on the SHT85 and its application please consult the documents in Table 23. Parameter values specified in the datasheet overrule possibly conflicting statements given in references cited in this datasheet. Document Name SHT85 Shipping Package Description Describes the standard shipping package Handling of SMD Packages Humidity Sensors Assembly Guide Datasheet Humidity Sensor SHT3x Digital All specifications of the SHT35-DIS Datasheet Humidity Sensor Filter All relevant specifications of the filter Membrane SHT3x membrane Handling Instructions Humidity Sensors Guidelines for proper handling of SHTxx humidity sensors Specification Statement Humidity Definition of sensor specifications. Sensors Source Available upon request. Available for download at the Sensirion humidity sensors download center: www.sensirion.com/humidity-download Available for download at the Sensirion humidity sensors download center: www.sensirion.com/humidity-download Available for download at the Sensirion humidity sensors download center: www.sensirion.com/humidity-download Available for download at the Sensirion humidity sensors download center: www.sensirion.com/humidity-download Available for download at the Sensirion humidity sensors download center: www.sensirion.com/humidity-download Table 23 Documents containing further information relevant for the SHT85. www.sensirion.com Version 3 – August 2020 21/23 10 Revision History Release Date 06. November 2018 29. August 2019 14. August 2020 www.sensirion.com Version Page(s) 1 All 2 1 3 10 18 22 3 18 19 23 Changes Initial Release Included Protected by exclusive license for several patents Table 2: corrected T drift from typ to max Table 8: corrected minor error Section 5: updated mating socket information Updated “Important Notices” and “Headquarters and Subsidiaries” Section 5: Introduction of conformal coating Legend to Figure 6: Mention of conformal coating Updated “Important Notices” and “Headquarters and Subsidiaries” Version 3 – August 2020 22/23 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 © 2020, by SENSIRION. CMOSens® 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.com/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.com/jp Sensirion China Co. Ltd. phone: +86 755 8252 1501 info-cn@sensirion.com www.sensirion.com/cn Sensirion Taiwan Co. Ltd phone: +886 3 5506701 info@sensirion.com www.sensirion.com www.sensirion.com To find your local representative, please visit www.sensirion.com/distributors Version 3 – August 2020 23/23