Datasheet SHT1x (SHT10, SHT11, SHT15) Humidity and Temperature Sensor Fully calibrated Digital output Low power consumption Excellent long term stability SMD type package reflow solderable Product Summary Each SHT1x is individually calibrated in a precision SHT1x (including SHT10, SHT11 and SHT15) is Sensirions family of surface mountable relative humidity humidity chamber. The calibration coefficients are and temperature sensors. The sensors integrate sensor programmed into an OTP memory on the chip. These elements plus signal processing on a tiny foot print and coefficients are used to internally calibrate the signals provide a fully calibrated digital output. A unique from the sensors. The 2-wire serial interface and internal voltage regulation allows for easy and fast system capacitive sensor element is used for measuring relative humidity while temperature is measured by a band-gap integration. The tiny size and low power consumption sensor. The applied CMOSens technology guarantees makes SHT1x the ultimate choice for even the most demanding applications. excellent reliability and long term stability. Both sensors are seamlessly coupled to a 14bit analog to digital SHT1x is supplied in a surface-mountable LCC (Leadless converter and a serial interface circuit. This results in Chip Carrier) which is approved for standard reflow superior signal quality, a fast response time and soldering processes. The same sensor is also available insensitivity to external disturbances (EMC). with pins (SHT7x) or on flex print (SHTA1). Dimensions Sensor Chip SHT1x V4 for which this datasheet applies features a version 4 Silicon sensor chip. Besides the humidity and temperature sensors the chip contains an amplifier, A/D 2.0 0.1 1.5 0.1 sensor opening 1.5 0.2 2.5 0.1 converter, OTP memory and a digital interface. V4 sensors can be identified by the alpha-numeric traceability code on the sensor cap see example A5Z code on Figure 1. NC NC 1 NC Material Contents 2 NC A5Z While the sensor is made of a CMOS chip the sensor 3 NC housing consists of an LCP cap with epoxy glob top on an 11 FR4 substrate. The device is fully RoHS and WEEE 4 NC compliant, thus it is free of Pb, Cd, Hg, Cr(6+), PBB and PBDE. 2.6 MAX 3.3 0.1 Evaluation Kits 4.93 0.05 0.8 0.1 For sensor trial measurements, for qualification of the sensor or even experimental application (data logging) of the sensor there is an evaluation kit EK-H4 available Figure 1: Drawing of SHT1x sensor packaging, dimensions in including SHT71 (same sensor chip as SHT1x) and 4 mm (1mm = 0.039inch). Sensor label gives 11 for SHT11 as sensor channels, hard and software to interface with a an example. Contacts are assigned as follows: 1:GND, 2:DATA, computer. For other evaluation kits please check 3:SCK, 4:VDD. www.sensirion.com/humidity. www.sensirion.com Version 4.3 May 2010 1/11 7.47 0.05 0.95 0.1 4.2 0.1 1.83 0.05 1.27 0.05 0.6 0.1 5.2 0.2 2.2 MAX Datasheet SHT1x Sensor Performance 123 45 Relative Humidity Temperature Parameter Condition min typ max Units Parameter Condition min typ max Units 0.4 0.05 0.05 %RH 0.04 0.01 0.01 C 1 1 Resolution Resolution 8 12 12 bit 12 14 14 bit 2 2 Accuracy typical 4.5 %RH Accuracy typical 0.5 C SHT10 SHT10 maximal see Figure 2 maximal see Figure 3 2 2 Accuracy typical 3.0 %RH Accuracy typical 0.4 C SHT11 SHT11 maximal see Figure 2 maximal see Figure 3 2 2 typical %RH typical C Accuracy 2.0 Accuracy 0.3 SHT15 SHT15 maximal see Figure 2 maximal see Figure 3 Repeatability %RH 0.1 Repeatability 0.1 C Hysteresis %RH 1 -40 123.8 C Operating Range -40 254.9 F Non-linearity linearized <<1 %RH 3 6 Response time 8 s Response Time 5 30 s (63%) (63%) Operating Range 0 100 %RH Long term drift < 0.04 C/yr 4 Long term drift normal < 0.5 %RH/yr 10 3.0 2.5 8 SHT10 2.0 6 SHT11 SHT10 1.5 4 SHT11 1.0 2 0.5 SHT15 SHT15 0 0.0 0 10 20 30 40 50 60 70 80 90 100 -40 -20 0 20 40 60 80 100 Temperature (C) Relative Humidity (%RH) Figure 2: Maximal RH-tolerance at 25C per sensor type. Figure 3: Maximal T-tolerance per sensor type. Electrical and General Items Packaging Information Sensor Type Packaging Quantity Order Number Parameter Condition min typ max Units Source Voltage 2.4 3.3 5.5 V SHT10 Tape & Reel 2000 1-100218-04 Tape & Reel 100 1-100051-04 sleep 2 5 W Power SHT11 measuring 3 mW Tape & Reel 400 1-100098-04 5 Consumption Tape & Reel 2000 1-100524-04 average 90 W Communication digital 2-wire interface, see Communication Tape & Reel 100 1-100085-04 SHT15 Tape & Reel 400 1-100093-04 Storage 10 50C (0 125C peak), 20 60%RH This datasheet is subject to change and may be amended without prior notice. 1 4 The default measurement resolution of is 14bit for temperature and 12bit for Value may be higher in environments with high contents of volatile organic humidity. It can be reduced to 12/8bit by command to status register. compounds. See Section 1.3 of Users Guide. 2 5 Accuracies are tested at Outgoing Quality Control at 25C (77F) and 3.3V. Values for VDD=3.3V at 25C, average value at one 12bit measurement Values exclude hysteresis and are applicable to non-condensing environments per second. only. 6 Response time depends on heat capacity of and thermal resistance to 3 Time for reaching 63% of a step function, valid at 25C and 1 m/s airflow. sensor substrate. www.sensirion.com Version 4.3 May 2010 2/11 RH (%RH) T (C)