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| Features and Benefits * * * * Solid state sensor High reliability Low cost, small size On chip temperature sensor Applications * * * Gas analysis equipment IR thermometers Automotive contactless temperature sensing. Ordering Information Part No MLX90247 MLX90247 MLX90247 Suffix Ta Package code E (-20C to +85C) SF(TO-39) E (-20C to +85C) E (-20C to +85C) SF(TO-39) SF(TO-39) Type DSA DSE DSG Description Thermopile detector with on-chip PTC thermistor, floating thermopile outputs. Thermopile detector with high sensitivity NTC thermistor, floating thermopile outputs. Thermopile detector with on-chip PTC thermistor, symmetrical thermopile outputs * 1. Functional Diagrams 30kOhm 1 1 OutIr+ OutIr+ 60kOhm 20uV/K VSS 4 Thermopile 40uV/K 3 Thermopile OutIr- 20uV/K 3 30kOhm OutIr- 2 Rsens + 26kOhm PTC Socket 2 100kOhm Rsens - 4 VSS NTC Socket MLX90247DSG 3901090247 Rev. 002 Page 1 of 11 MLX90247DSE Data Sheet Aug/02 1 60kOhm 40uV/K 3 Thermopile OutIr+ OutIr- 2 Rsens 26kOhm + 4 PTC Socket VSS MLX90247DSA 2. Description The MLX90247family sensors are thermopile sensors IC which detects very small amounts of heat radiation. The sensors consist of a membrane with a thermopile on top of it. The hot junctions of the thermopile are positioned near the center of the membrane and the cold junctions above the bulk silicon edge. Due to the low thermal conductivity of the membrane, absorbed heat will cause the temperature to increase more at the center of the membrane than at the edge above the bulk. This temperature difference is converted to an electric potential by the thermo-electric effect in the thermopile junctions. No supply voltage is needed. The MLX90247DSG sensor IC is integrated together with a PTC thermistor. The thermopile sensor is grounded at the middle point, so that the output common-mode voltage is at ground potential. Using grounded thermopile sensor gives improved EMC susceptibility in some applications. The MLX90247DSE sensor IC is packaged together with a 100k NTC chip thermistor. The 3901090247 Rev. 002 Page 2-2 of 11 Data Sheet Aug/02 sensor and thermistor can be used independent of each other if desired, as the thermopile potential is floating. This type of thermistor has better sensitivity than the PTC types, but must be used in smaller ambient ranges. Typical applications are ear thermometers or other medical equipment. The MLX90247DSA sensor IC is integrated together with a PTC thermistor. The sensor and thermistor can be used independent of each other if desired, as the thermopile potential is floating. TABLE OF CONTENTS FEATURES AND BENEFITS .................................................................................................................. 1 APPLICATIONS ...................................................................................................................................... 1 1. 2. 3. 4. 5. FUNCTIONAL DIAGRAMS ........................................................................................................... 1-1 DESCRIPTION .............................................................................................................................. 2-2 GLOSSARY OF TERMS .................................................................................................................. 4 ABSOLUTE MAXIMUM RATINGS ................................................................................................... 4 MLX90247DSG ................................................................................................................................ 5 5.1. 6. MLX90247DSG ELECTRICAL SPECIFICATIONS ............................................................................... 5 MLX90247DSE................................................................................................................................. 6 6.1. MLX90247DSE ELECTRICAL SPECIFICATIONS ............................................................................... 6 7. MLX90247DSA................................................................................................................................. 7 7.1. MLX90247DSA ELECTRICAL SPECIFICATIONS ............................................................................... 7 8. 9. PIN OUT........................................................................................................................................... 8 HOUSING SPECIFICATIONS........................................................................................................... 8 10. PACKAGE OUT ............................................................................................................................... 9 11. RELIABILITY INFORMATION ........................................................................................................ 10 12. ESD PRECAUTIONS...................................................................................................................... 10 13. DISCLAIMER ................................................................................................................................. 11 3901090247 Rev. 002 Page 3 of 11 Data Sheet Aug/02 PTC : See Thermistor 3. Glossary of Terms IR : Infrared. Every object emits infrared radiation in relation to its temperature. This effect can be used to measure the temperature without the need for physical contact. NTC : See Thermistor Thermistor : Temperature dependant resistor. Basically there are 2 types. The types that increase their resistance with rising temperature are PTC ( positive thermal coefficient ) types. The ones that decrease their resistance with rising temperature we call NTC ( negative thermal coefficient ) types. 4. Absolute Maximum Ratings Operating Temperature Range Operating Temperature Range Soldering Temperature -20 ~ 85 C -40 ~ 150 C < 220 C T < 5 sec. Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolutemaximum-rated conditions for extended periods may affect device reliability. 3901090247 Rev. 002 Page 4 of 11 Data Sheet Aug/02 5. MLX90247DSG 5.1. MLX90247DSG Electrical Specifications DC Operating Parameters TA = -20oC to 85oC, (unless otherwise specified) Parameter Symbol Test Conditions Min Thermopile Resistance Sensitivity TC of Sensitivity Thermistor Value Thermal Coefficient PTC (1) Rtp S TCs Rptc A1 A2 @298K sensor @298K black body @299K @298K @298K 25C-100C 2 Typ Max 75 55 Units k V/K %/K 44 29 0.1 18.2 5720 26 7150 11.57 33.8 8580 k ppm/K ppm/K2 R(T)=R(298K).[1+A1.(T-298K)+A2.(T-298) ] Note: when measuring resistances with an ohm meter, please take care that the internal protection diodes, as indicated in the diagram below, are always reverse biased. Thermopile 30kOhm 350 Ohm 1 20uV/K 20uV/K 3 30kOhm 350 Ohm 2 26kOhm + 4 Socket 3901090247 Rev. 002 Page 5 of 11 Data Sheet Aug/02 6. MLX90247DSE 6.1. MLX90247DSE Electrical Specifications DC Operating Parameters TA = -20oC to 85oC, (unless otherwise specified) Parameter Symbol Test Conditions Min Thermopile Resistance Sensitivity TC of Sensitivity Thermistor Value Thermal Coefficient NTC Rtp S TCs Rntc ntc @298K sensor @298K black body @299K @298K @298K 0-50C (1) 95 4120 44 29 0.1 100 4140 105 4161 Typ Max 75 55 Units k V/K %/K k K Tolerance given between 15C and 35C. Typical value corresponds to a relative resistance change of - 4.68%/C. Definition of is lnR/(1/T) with T in K. (Naperian logarithm). Note: when measuring resistances with an ohm meter, please take care that the internal protection diodes, as indicated in the functional diagram below, are always reverse biased. Thermopile 30kOhm 350 Ohm 1 20uV/K 20uV/K 3 30kOhm 350 Ohm 2 100kOhm - 4 Socket 3901090247 Rev. 002 Page 6 of 11 Data Sheet Aug/02 7. MLX90247DSA 7.1. MLX90247DSA Electrical Specifications DC Operating Parameters TA = -20oC to 85oC, (unless otherwise specified) Parameter Symbol Test Conditions Min Thermopile Resistance Sensitivity TC of Sensitivity Thermistor Value Thermal Coefficient PTC (1) Rtp S TCs Rptc A1 A2 @298K sensor @298K black body @299K @298K @298K 25C-100C 2 Typ Max 75 55 Units k V/K %/K 44 29 0.1 18.2 5720 26 7150 11.57 33.8 8580 k ppm/K ppm/K2 R(T)=R(298K).[1+A1.(T-298K)+A2.(T-298) ] Note: when measuring resistances with an ohm meter, please take care that the internal protection diodes, as indicated in the functional diagram below, are always reverse biased. Thermopile 30kOhm 350 Ohm 1 20uV/K Rda 20uV/K 3 30kOhm 350 Ohm 2 26kOhm + 4 Socket 3901090247 Rev. 002 Page 7 of 11 Data Sheet Aug/02 8. Pin Out TO-39 package - connections Pin 1 2 3 4 Symbol OutIr+ Rsens OutIrVss 1 Description Infrared Thermopile positive output Thermistor for sensor ambient temperature measurement Infrared Thermopile negative output Thermistor and thermopile ground / case potential 2 4 3 Top view = pins down 9. Housing specifications Parameter TO-39 specifications Metal cap Filling gas Filter specifications Transmission Transmission Sensor window FOV Aperture diameter Value Unit Comment Welded Nitrogen >75 <0.5 100 3.5 % % mm 7.5 < <13.5 0 < < 5 Full opening angle: Determined by aperture Default 3901090247 Rev. 002 Page 8 of 11 Data Sheet Aug/02 10. Package Out 3901090247 Rev. 002 Page 9 of 11 Data Sheet Aug/02 11. Reliability Information Melexis devices are classified and qualified regarding suitability for infrared, vapor phase and wave soldering with usual (63/37 SnPb-) solder (melting point at 183degC). The following test methods are applied: * * * IPC/JEDEC J-STD-020A (issue April 1999) Moisture/Reflow Sensitivity Classification For Nonhermetic Solid State Surface Mount Devices CECC00802 (issue 1994) Standard Method For The Specification of Surface Mounting Components (SMDs) of Assessed Quality MIL 883 Method 2003 / JEDEC-STD-22 Test Method B102 Solderability For all soldering technologies deviating from above mentioned standard conditions (regarding peak temperature, temperature gradient, temperature profile etc) additional classification and qualification tests have to be agreed upon with Melexis. The application of Wave Soldering for SMD's is allowed only after consulting Melexis regarding assurance of adhesive strength between device and board. For more information on manufacturability/solderability see quality page at our website: http://www.melexis.com/ 12. ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 3901090247 Rev. 002 Page 10 of 11 Data Sheet Aug/02 13. Disclaimer Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Melexis reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with Melexis for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by Melexis for each application. The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of Melexis' rendering of technical or other services. (c) 2002 Melexis NV. All rights reserved. For the latest version of this document, go to our website at: www.melexis.com Or for additional information contact Melexis Direct: Europe and Japan: Phone: +32 13 67 04 95 E-mail: sales_europe@melexis.com All other locations: Phone: +1 603 223 2362 E-mail: sales_usa@melexis.com QS9000, VDA6.1 and ISO14001 Certified 3901090247 Rev. 002 Page 11 of 11 Data Sheet Aug/02 |
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