Datasheet
MLX90640 32x24 IR array
Datasheet
Page 2 of 60
REVISION 11 – 3 AUGUST 2018
Contents
1. Features and Benefits
1. Features and Benefits1. Features and Benefits
1. Features and Benefits
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2. Application Examples
2. Application Examples2. Application Examples
2. Application Examples
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3. Des
3. Des3. Des
3. Description
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cription
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4. Ordering Information
4. Ordering Information4. Ordering Information
4. Ordering Information
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5. Glossary of Terms
5. Glossary of Terms5. Glossary of Terms
5. Glossary of Terms
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6. Pin Definitions and Descriptions
6. Pin Definitions and Descriptions6. Pin Definitions and Descriptions
6. Pin Definitions and Descriptions
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7. Absolute Maximum Ratings
7. Absolute Maximum Ratings7. Absolute Maximum Ratings
7. Absolute Maximum Ratings
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8. General Electrical Specifications
8. General Electrical Specifications8. General Electrical Specifications
8. General Electrical Specifications
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9. False pixel correction
9. False pixel correction9. False pixel correction
9. False pixel correction
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10. Detailed General Description
10. Detailed General Description10. Detailed General Description
10. Detailed General Description
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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. Reading patterns ............................................................................................................................. 14
10.7. Address map ................................................................................................................................... 16
10.7.1. Internal registers....................................................................................................................... 16
10.7.2. RAM ........................................................................................................................................... 18
10.7.3. EEPROM .................................................................................................................................... 19
11. Calculating Object Temperature
11. Calculating Object Temperature11. Calculating Object Temperature
11. Calculating Object Temperature
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11.1. Restoring calibration data from EERPOM ..................................................................................... 22
11.1.1. Restoring the VDD sensor parameters .................................................................................... 22
11.1.2. Restoring the Ta sensor parameters ....................................................................................... 22
11.1.3. Restoring the offset .................................................................................................................. 23
11.1.4. Restoring the Sensitivity .................................................................................................. 24
11.1.5. Restoring the Kv(i,j) coefficient ................................................................................................ 25
11.1.6. Restoring the Kta(i,j) coefficient .............................................................................................. 25
11.1.7. Restoring the GAIN coefficient (common for all pixels) ......................................................... 26
11.1.8. Restoring the KsTa coefficient (common for all pixels) .......................................................... 26