MLX90641 16x12 IR array

Datasheet

Page 2 of 53

REVISION 2 – FEBRUARY 6, 2019

[DOCSERVER NR]

Contents

1. Features and Benefits............................................................................................................................ 1

2. Application Examples............................................................................................................................. 1

3. Description ............................................................................................................................................ 1

4. Ordering Information ............................................................................................................................ 5

5. Glossary of Terms.................................................................................................................................. 6

6. Pin Definitions and Descriptions ............................................................................................................ 7

7. Absolute Maximum Ratings ................................................................................................................... 7

8. General Electrical Specifications ............................................................................................................ 8

9. False pixel correction............................................................................................................................. 9

10. Detailed General Description............................................................................................................... 9

10.1. Pixel position.....................................................................................................................................9

10.2. Communication protocol ...............................................................................................................10

10.2.1. Low level ...................................................................................................................................10

10.3. Measurement mode.......................................................................................................................11

10.4. Refresh rate.....................................................................................................................................11

10.5. Measurement flow .........................................................................................................................12

10.6. Address map ...................................................................................................................................14

10.6.1. Internal registers.......................................................................................................................14

10.6.2. RAM ...........................................................................................................................................16

EEPROM.................................................................................................................................................17

11. Calculating Object Temperature........................................................................................................ 20

11.1. Restoring calibration data from EERPOM and calculations..........................................................20

11.1.1. Restoring the VDD sensor parameters and VDD calculations................................................20

11.1.2. Restoring the Ta sensor parameters .......................................................................................21

11.1.3. Restoring the offset ..................................................................................................................21

11.1.4. Restoring the Sensitivity

..................................................................................................22

11.1.5. Restoring the Kta(i,j) coefficient ..............................................................................................23

11.1.6. Restoring the Kv(i,j) coefficient................................................................................................23

11.1.7. Restoring the GAIN coefficient (common for all pixel)...........................................................24

11.1.8. Restoring the KsTa coefficient (common for all pixel)............................................................24

11.1.9. Restoring corner temperatures (common for all pixel)..........................................................24