MLX90641ESF-BCA-000-SP

MLX90641 16x12 IR array Datasheet 1. Features and Benefits 2. Application Examples Small size, low cost 16x12 pixels IR array High precision non-contact temperature measurements Easy to integrate Microwave ovens Industry standard four lead TO39 package Intrusion / Movement detection Factory calibrated Temperature sensing element for Noise Equivalent Temperature Difference residential, commercial and industrial (NETD) 0.1K 4Hz refresh rate building air conditioning 2 I C compatible digital interface Thermal Comfort sensor in automotive Air Programmable refresh rate 0.5Hz64Hz Conditioning control system 3.3V supply voltage Passenger classification Current consumption 12mA Industrial temperature control of moving parts 2 FOV options 55x35 and 110x75 Visual IR thermometers Operating temperature -40C 125C Driver SW for MCU available at: Target temperature -40C 300C MLX90641 16x12 IR array Datasheet Contents 1. Features and Benefits ............................................................................................................................ 1 2. Application Examples ............................................................................................................................. 1 3. Description ............................................................................................................................................ 1 4. Ordering Information ............................................................................................................................ 6 5. Glossary of Terms .................................................................................................................................. 7 6. Pin Definitions and Descriptions ............................................................................................................ 8 7. Absolute Maximum Ratings ................................................................................................................... 8 8. General Electrical Specifications ............................................................................................................ 9 9. False pixel correction ........................................................................................................................... 10 10. Detailed General Description ............................................................................................................. 10 10.1. Pixel position ................................................................................................................................... 10 10.2. Communication protocol ............................................................................................................... 11 10.2.1. Low level ................................................................................................................................... 11 10.3. Measurement mode ....................................................................................................................... 12 10.4. Refresh rate ..................................................................................................................................... 12 10.5. Measurement flow ......................................................................................................................... 13 10.6. Address map ................................................................................................................................... 15 10.6.1. Internal registers....................................................................................................................... 15 10.6.2. RAM ........................................................................................................................................... 17 EEPROM ................................................................................................................................................. 18 11. Calculating Object Temperature ........................................................................................................ 21 11.1. Restoring calibration data from EERPOM and calculations.......................................................... 21 11.1.1. Restoring the VDD sensor parameters and VDD calculations ................................................ 21 11.1.2. Restoring the Ta sensor parameters ....................................................................................... 22 11.1.3. Restoring the offset .................................................................................................................. 22 11.1.4. Restoring the Sensitivity .................................................................................................... 23 11.1.5. Restoring the Kta(i,j) coefficient .............................................................................................. 24 11.1.6. Restoring the Kv(i,j) coefficient ................................................................................................ 24 11.1.7. Restoring the GAIN coefficient (common for all pixel) ........................................................... 25 11.1.8. Restoring the KsTa coefficient (common for all pixel) ............................................................ 25 11.1.9. Restoring corner temperatures (common for all pixel) .......................................................... 25 REVISION 3 DECEMBER 9, 2019 3901090641 Page 2 of 55