MLX90621 datasheet(20/44 Pages) MELEXIS

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MLX90621

16x4 IR array

Datasheet

39001090621

Page 20 of 44

Datasheet IR16x4

Rev 3.0

15 September 2016

Example for To calculations

7.3.4.

Let’s assume that we have following EEPROM data for pixel i=2, j=8:

EEPROM

address

Cell name

Stored as

Cell values (hex)

0x22

∆ J

unsigned

0x21

0x62

J(J,•)

2’s complement

0xBC

0xA2

∆Œ(J,•)

unsigned

0xCD

0xC0

Ks_scale

unsigned

0x99

0xC4

1•N

2’s complement

0x9E

0xD0

•GŽŽGH[

2’s complement

0x8A

0xD1

•GŽŽGHZ

0xFF

0xD3

FP[

2’s complement

0x9D

0xD4

FPZ

0xFF

0xD5

2’s complement

0xA2

0xD6

ŒFP[

unsigned

0xA8

0xD7

ŒFPZ

0x0F

0xD8

2’s complement

0x18

0xD9

∆ J‰†™žt, J‰†™žt

unsigned

0x07

0xE0

ŒR[

unsigned

0xAE

0xE1

ŒRZ

0x4E

0xE2

ŒR‰†™žt

unsigned

0x26

0xE3

∆Œ••/°-

unsigned

0x1F

0xE4

¤.

unsigned

0x00

0xE5

¤:

0x80

0xE6

1 .

2’s complement

0x0C

0xE7

1 :

0x02

Table 9 EXAMPLE for To calibration values

Let’s assume that we have the following input data:

9ŠL(6,]) 0 01 7 439, decimal value

Sign check

439 X 32768 → 9ŠL(6,]) 439 LSB

9FP 0 — 65500, decimal value (compensation pixel readings)

Sign check

65500 @ 32767 → 9FP 65500 065536 036 LSB

≈ 36.18> (as calculated in 7.3.2)

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