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TECHNICAL 1 DATA

TEMPERATURE AND RELATIVE HUMIDITY SENSOR HTS2010SMD

TECHNICAL 1 DATA
TEMPERATURE AND RELATIVE HUMIDITY SENSOR HTS2010SMD
Based on a unique capacitive cell for humidity measurement and a Negative Temperature Coefficient (NTC) thermistor for temperature measurement, this dual purpose relative humidity / temperature miniaturized sensor is designed for high volume, cost sensitive applications with tight space constraints. It is useful in all applications where dew point, absolute humidity measurements or humidity compensation are required.
MAIN FEATURES
q Miniature Surface mount SMD package q Compatible with automated assembly processes, including wave soldering, water immersion and reflow soldering q Full interchangeability with no calibration required in standard conditions q High reliability and long term stability
HTS2010SMD
HUMIDITY SENSOR SPECIFIC FEATURES
q Instantaneous desaturation after long periods in saturation phase q Patented solid polymer structure q Suitable for linear voltage or frequency output circuitry q Fast response time
TEMPERATURE SENSOR SPECIFIC FEATURES
q High quality thermistor q Stable q High sensitivity
MAXIMUM RATINGS
Ratings Symbol
Value
Storage Temperature Supply Voltage on humidity cell Humidity Operating Range Temperature Operating Range Maximum Electric Power to be supplied (continuous) @ 25°C
Tstg Vs RH Ta P25
CHARACTERISTICS
Humidity sensor
Characteristics
Symbol
Unit.
Humirel Sensor Device Data / HPC008 Rev D April 2001
TECHNICAL 2 DATA
CHARACTERISTICS (CONT)
Humidity sensor
Characteristics
Symbol
Unit.
Tighter tolerance available on request
Temperature sensor
Characteristics Symbol Min. Typ. Max. Unit.
Nominal resistance @ 25°C Beta value : B25 / 100 Temperature measuring range Nominal Resistance Tolerance B value tolerance Response Time
Tighter tolerance available on request
Typical response curve of HTS2010SMD in humidity
Calibration data are traceable to NIST standards through CETIAT laboratory.
capacitance (in pF)
°C -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 R NTC standardized ohm °C ohm 262960 194110 144790 109030 82923 63591 49204 38279 30029 23773 18959 15207 12280 10000 8178 35 40 45 50 55 60 65 70 75 80 85 90 95 100 6734 5575 4636 3874 3237 2720 2304 1960 1674 1432 1235 1067 927 809 °C -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 R NTC exponential ohm °C ohm 35 40 45 50 55 60 65 70 75 80 85 90 95 100 6670 5500 4550 3800 3180 2690 2270 1940 1650 1430 1230 1070 925 810
Typical temperature output
Depending on the needed temperature measurement range and the associated accuracy, we suggest two methods to access to the NTC resistance values.
The actual characteristic of an NTC thermistor can, however, only be roughly described by the exponential relation, as the material parameter B in reality also depends on temperature. So this approach is only suitable for describing a restricted range around the rated temperature or resistance with sufficient accuracy.
2 For practical applications a more precise description of the real R / T curve may be required. Either more complicated approaches (e.g the Steinhart-Hart equation) are used or the resistance / temperature relation as given in tabulated from. These standardized curves have been experimentally determined with utmost accuracy they are aslo available for temperature increments of 1 degree.
Humirel Sensor Device Data / HPC008 Rev D April 2001
TECHNICAL 3 DATA
SUGGESTED EVALUATION CIRCUIT FOR HUMIDITY FREQUENCY
AND TEMPERATURE ANALOG OUTPUTS
Relative humidity (Frequency output)
Resistors values
Temperature (voltage output)
The temperature measurement is done by a voltage divider, RV2 must be adjusted to get 2.5 V at 25°C as temperature measurement.
Polarization
In order to get better reproducibility during measurement, always connect pin 4 (see the package outline on page 4) to the ground of the circuit.
Soldering instructions
See application note HPC 034 VO
Humirel Sensor Device Data / HPC008 Rev D April 2001
TECHNICAL 4 DATA
QUALIFICATION PROCESS
PACKAGE OUTLINE HTS2010SMD
GULL WING (JLEAD option also available).
RECOMMENDED FOOTPRINT
All dimensions in mm Scale 1:1
Dimension
mm (typical) 6
ORDERING INFORMATION (MULTIPLE PACKAGE QUANTITY OF 80 PIECES). HTS 2010 SMD : HUMIDITY ANALOG VOLTAGE OUTPUT MODULE
SAMPLE KIT OF HTS 2010 IS AVAILABLE THROUGH HUMIREL WEB SITE www.humirel.com
email : sales@humirel.com
Humirel Sensor Device Data / HPC008 Rev D April 2001