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 (1) and reflow processes 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 J 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=25C, 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 (1) Nominal capacitance 55%RH C 177 180 183 pF Temperature coefficient T -0.01 pF/C cc Average Sensitivity from 33% to 75%RH C/%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 -8 3 -6 2 -3 C (pF)=C 55 %*( 3.903 10 *RH -8.294 10 *RH +2.188 10 *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 +3 3 +4 2 +4 +3 RH (%) = -3.4656 10 *X +1.0732 10 *X -1.0457 10 *X+3.2459 10 ) With X=C(read) / C 55%RH SENSOR SOLUTIONS /// HS1101LF HPC052 J 9/2015 Page 2