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MLX90632 FIR sensor Datasheet Features and Benefits 皈 Small size 皈 Easy to integrate 皈 Factory calibrated 皈 External ambient and object temperature calculation 皈 Standard measurement resolution 0.02°C 皈 Medical measurement resolution 0.01°C 皈 Supply voltage of 3.3V, supply current 1mA (sleep current less than 2.5uA) 皈 I2C compatible digital interface 皈 Software definable I2C address with 1 LSB bit external address pin 皈 Field of View of 50° 皈 Default refresh rate 0.5s, configurable between 16ms and 2s 皈 Integrated post-calibration option Application Examples 皈 High precision non-contact temperature measurements 皈 Body temperature measurement 皈 Non-contact thermometer for mobile and IoT application 皈 Temperature sensing element for residential, commercial and industrial building air conditioning 皈 Industrial temperature control of moving parts 皈 Home appliances with temperature control 皈 Healthcare 皈 Livestock monitoring 皈 https://github.com/melexis/mlx90632library Figure 1: Image of MLX90632 MLX90632 FIR sensor Datasheet Description The MLX90632 is a non-contact infrared temperature sensor in a small SMD SFN package. The device is factory calibrated with calibration constants stored in the EEPROM memory. The ambient and object temperature can be calculated externally based on these calibration constants and the measurement data. The MLX90632 is available in two different versions: standard and medical accuracy. Both versions are calibrated in the ambient temperature range from -20 to 85贑. The difference between both versions is visible in accuracy and the object temperature range. The medical version is factory calibrated with an accuracy of ±0.2贑 within the narrow object temperature range from 35 to 42贑 for medical applications. The object temperature range is limited from -20 to 100贑. On the other hand, the standard version covers an object temperature range from -20 to 200贑 but offers an accuracy of ±1贑. It is very important for the application designer to understand that these accuracies are guaranteed and achievable when the sensor is in thermal equilibrium and under isothermal conditions (no temperature differences across the sensor package). The accuracy of the thermometer can be influenced by temperature differences in the package induced by causes like (among others): Hot electronics behind the sensor, heaters/coolers behind or beside the sensor or by a hot/cold object very close to the sensor that not only heats the sensing element in the thermometer but also the thermometer package. A major strength of the MLX90632 is that these temperature differences around the sensor package will be reduced to the minimum. However, some extreme cases will influence the sensor. In the same way, localized thermal variations -like turbulence in the air- will not generate thermal noise in the output signal of the thermopile. The typical supply voltage of the MLX90632 is 3.3V. For the I2C communication with the master microcontroller, two versions of the sensor are available, working either at 3.3V or 1.8V I2C reference voltage. The communication to the chip is done by I2C in fast mode plus (FM+). Through I2C the external microcontroller has access to the following blocks: 皈 RAM memory used for measurement data, in this document mainly referred to as ‘storage memory’ 皈 EEPROM used to store the trimming values, calibration constants and device/measurement settings Based on this data, the external microcontroller can calculate the object temperature and if needed the sensor temperature. An optical filter (long-wave pass) that cuts off the visible and near infra-red radiant flux is integrated in the sensor to provide ambient light immunity. The wavelength pass band of this optical filter is from 2 till 14µm. MLX90632 FIR sensor Datasheet Contents Features and Benefits................................................................................................................................ 1 Application Examples ................................................................................................................................ 1 Description ................................................................................................................................................ 2 2. Ordering Information ............................................................................................................................ 5 3. Glossary of Terms .................................................................................................................................. 6 4. Absolute Maximum ratings.................................................................................................................... 7 5. Pin definitions and descriptions............................................................................................................. 8 6. Electrical characteristics ........................................................................................................................ 9 7. Detailed General Description............................................................................................................... 10 7.1. Block diagram....................................................................................................................................10 7.2. Description ........................................................................................................................................10 8. Memory map....................................................................................................................................... 11 9. Control and configuration.................................................................................................................... 14 9.1. Measurement control.......................................................................................................................16 9.2. Device status .....................................................................................................................................17 9.3. Measurement settings......................................................................................................................18 9.3.1. Refresh rate.................................................................................................................................18 10. I2C commands ................................................................................................................................... 19 10.1. I2C address.......................................................................................................................................20 10.2. Addressed read ...............................................................................................................................21 10.3. Addressed write..............................................................................................................................21 10.4. Global reset.....................................................................................................................................22 10.5. Addressed reset ..............................................................................................................................22 10.6. EEPROM unlock for customer access ............................................................................................22 10.7. Direct read ......................................................................................................................................23 11. Operating Modes............................................................................................................................... 24 12. Temperature calculation ................................................................................................................... 25 12.1. Pre-calculations............................................................................................. 内容过长，仅展示头部和尾部部分文字预览，全文请查看图片预览。 © 2019 Melexis N.V. All rights reserved. REVISION 8 – OCTOBER, 2019 Page 44 of 45 MLX90632 FIR sensor Datasheet 22. Contact Information For the latest version of this document, go to our website at doc.001pp.com Or for additional information contact Melexis Direct: Europe, Africa, Asia: America: Phone: +32 1367 0495 Phone: +1 248 306 5400 E-mail: sales_europe@melexis.com E-mail: sales_usa@melexis.com ISO/TS 16949 and ISO14001 Certified REVISION 8 – OCTOBER, 2019 Page 45 of 45 [文章尾部最后500字内容到此结束,中间部分内容请查看底下的图片预览]请点击下方选择您需要的文档下载。

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