HS1101LF Relative Humidity Sensor SPECIFICATIONS  Lead free component  High reliability and long term stability  Patented solid polymer structure  Suitable for linear voltage or frequency output circuitry  Fast response time and very low temperature coefficient Based on a unique capacitive cell, these relative humidity sensors are designed for high volume, cost sensitive applications such as office automation, automotive cabin air control, home appliances, and industrial process control systems. They are also useful in all applications where humidity compensation is needed. FEATURES  Full interchangeability with no calibration required in standard conditions  Instantaneous desaturation after long periods in saturation phase  Compatible with automatized assembly processes, including Pb free wave soldering and reflow processes (1)  Individual marking for compliance to stringent traceability requirements  Part may be washed with distilled water APPLICATIONS  Automotive  Home Appliance  Printer  Meteorology SENSOR SOLUTIONS /// HS1101LF HPC052_K 9/2015 Page 1

HS1101LF Relative Humidity Sensor PERFORMANCE SPECS MAXIMUM RATINGS Ratings Symbol Value Unit Operating Temperature Ta -60 to 140 °C Storage Temperature Tstg -60 to 140 °C Supply Voltage (Peak) Vs 10 Vac Humidity Operating Range RH 0 to 100 % RH Peak conditions: less than 10% of the operating time. ELECTRICAL CHARACTERISTICS OF HUMIDITY SENSOR (Ta=25°C, measurement frequency @10kHz / 1V unless otherwise noted) Characteristics Symbol Min Typ Max Unit Humidity Measuring Range RH 1 99 %RH Supply Voltage Vs 10 V Nominal capacitance @55%RH (1) C 177 180 183 pF Temperature coefficient Tcc -0.01 pF/°C Average Sensitivity from 33% to 75%RH ΔC/%RH 0.31 pF/%RH Leakage Current (Vcc=5V) I 1 nA Recovery time after 150 hours of condensation tr 10 s Humidity Hysteresis +/-1 %RH Long term stability T +/-0.5 %RH/yr Time Constant (at 63% of signal, still air) 33%RH to 80%RH ta 3 5 s Deviation to typical response curve (10% RH to 90%RH) +/-2 %RH (1) Tighter specification available on request TYPICAL PERFORMANCE CURVES POLYNOMIAL RESPONSE OF HS1101LF C (pF)=C@55 %*( 3.903 10-8*RH3-8.294 10-6*RH2+2.188 10-3*RH+0.898) TYPICAL RESPONSE LOOK-UP TABLE (POLYNOMIAL REFERENCE CURVE) @ 10KHZ / 1V RH (%) 0 5 10 15 20 25 30 35 40 45 50 Cp (pF) 161.6 163.6 165.4 167.2 169.0 170.7 172.3 173.9 175.5 177.0 178.5 RH (%) 55 60 65 70 75 80 85 90 95 100 Cp (pF) 180 181.4 182.9 184.3 185.7 187.2 188.6 190.1 191.6 193.1 REVERSE POLYNOMIAL RESPONSE OF HS1101LF RH (%) = -3.4656 10+3*X3+1.0732 10+4*X2-1.0457 10+4*X+3.2459 10+3) With X=C(read) / C@55%RH SENSOR SOLUTIONS /// HS1101LF HPC052_K 9/2015 Page 2

HS1101LF Relative Humidity Sensor MEASUREMENT FREQUENCY INFLUENCE In this data sheet, all capacitance measurements are done @ 10 kHz / 1Volt. However, the sensor can operate without restriction from 5 kHz to 300 kHz POLARISATION In order to get a better reproducibility during measurements, always connect the case of the header (pin 2) to the ground of the circuit. The case of the header is located on the opposite side of the tab. SOLDERING INSTRUCTIONS We recommend taking specific attention to soldering conditions to get the best performance of MEAS-France sensors. See Application Note. To get it, please contact: humidity.application@te.com. PROPORTIONAL VOLTAGE OUTPUT CIRCUIT BLOCK DIAGRAM FREQUENCY OUTPUT CIRCUIT CIRCUIT Note: R22=499kΩ / R4=49.9kΩ / R1=1 kΩ / RV1=50 kΩ potentiometer / C1=10nF / C2=2.2nF / C3=100nF SENSOR SOLUTIONS /// HS1101LF HPC052_K 9/2015 Page 3

HS1101LF Relative Humidity Sensor This circuit is the typical astable design for 555. The HS1101LF, used as variable capacitor, is connected to the TRIG and THRES pin. Pin 7 is used as a short circuit pin for resistor R4. The HS1101LF equivalent capacitor is charged through R22 and R4 to the threshold voltage (approximately 0.67Vcc) and discharged through R22 only to the trigger level (approximately 0.33Vcc) since R4 is shorten to ground by pin 7. Since the charge and discharge of the sensor run through different resistors, R22 and R4, the duty cycle is determined by:  thigh = C@%RH*(R22+R4)*ln2  tlow= C@%RH*R22*ln2  F = 1/(thigh+tlow) = 1/(C@%RH*(R4+2*R22)*ln2)  Output duty cycle = thigh*F = R22/(R4+2*R22) To provide an output duty cycle close to 50%, R4 should be very low compared to R22 but never under a minimum value. Resistor R3 is a short circuit protection. 555 must be a CMOS version TYPICAL RESPONSE LOOK-UP TABLE RH (%) 0 5 10 15 20 25 30 35 40 45 50 Fout (Hz) - - 7155 7080 7010 6945 6880 6820 6760 6705 6650 RH (%) 55 60 65 70 75 80 85 90 95 100 Fout (Hz) 6600 6550 6500 6450 6400 6355 6305 6260 6210 - MEASUREMENT ERROR VS STRAY CAPACITANCE  Special attention is required in order to minimize stray capacitance in the layout. The added capacitance will act as a parallel capacitance with the sensor and create a measurement error.  A careful coating of PCB and components must be implemented to prevent unexpected deviations of Fout in high humidity conditions. SENSOR SOLUTIONS /// HS1101LF HPC052_K 9/2015 Page 4

HS1101LF Relative Humidity Sensor QUALIFICATION PROCESS HS1101LF sensors have been qualified through a complete qualification process taking in account many of the requirements of the JEDEC standard including:  Solder heat and solderability including lead free process  Pb free wave soldering and reflow soldering process(260°C) + DI water clean at 45°C  Mechanical shock JESD-22-B104-A  Vibration - Variable frequency(20 to 2000Hz) JESD-22-B103-A  Marking permanency  ESD - Electrostatic Discharge –Air Gun +-15kV(IEC 1000)  Salt Atmosphere JESD22-A107-A  Temperature Cycling - 40°C / +125°C  High Temperature / Humidity Operating Life - 93%RH / 60°C for 1000 hours  Low Humidity storage life - RH < 10%/23°C for 1000 hours  Resistance to immersion in water at ambient temperature and 80°C  High temperature storage 140°C for 168 hours  Resistance to many chemicals linked to home appliances/automotive or consumer applications PACKAGE OUTLINE SENSOR SOLUTIONS /// HS1101LF HPC052_K 9/2015 Page 5

HS1101LF Relative Humidity Sensor ORDERING INFORMATION HPP801A031 (MULTIPLE PACKAGE QUANTITY OF 48 PIECES) HS1101LF - CAPACITIVE RELATIVE HUMIDITY SENSOR To distinguish HS1101 from HS1101LF, HS1101LF is designed with a black plastic cap Sample kit of HS1101LF is available through MEASUREMENT SPECIALTIES web site: http://www.meas-spec.com/humidity-sensors.aspx EUROPE Measurement Specialties, Inc - MEAS France Impasse Jeanne Benozzi CS 83 163 31027 Toulouse Cedex 3 FRANCE Tél: +33 (0)5 820 822 02 Fax: +33(0)5 820 821 51 Sales: humidity.sales@meas-spec.com TE.com/sensorsolutions Measurement Specialties, Inc., a TE Connectivity company. Measurement Specialties, TE Connectivity, TE Connectivity (logo) and EVERY CONNECTION COUNTS are trademarks. All other logos, products and/or company names referred to herein might be trademarks of their respective owners. The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. © 2015 TE Connectivity Ltd. family of companies All Rights Reserved. SENSOR SOLUTIONS /// HS1101LF HPC052_K 9/2015 Page 6