EVB90620 Datasheet, PDF (23/39 Pages) Melexis Microelectronic Systems – High precision non-contact temperature measurements

MLX90620
16x4 IR array
8.2.3 EEPROM
A 2kbit, organized as 256x8 EEPROM is built in the Mlx90620. The EEPROM has a separate I2C
address SA = 0x50 and is used to store the calibration constants and the configuration of the device.
Address
00
08
10
18
20
28
30
38
40
48
50
58
60
68
70
78
80
88
90
98
A0
A8
B0
B8
C0
C8
D0
D8
E0
E8
F0
F8
0
Ai (0,0)
1
Ai (1,0)
2
Ai (2,0)
3
4
Ai (3,0)
Ai (0,1)
…
5
Ai (1,1)
6
Ai (2,1)
7
Ai (3,1)
Ai - IR pixels individual offset coefficients
Ai (0,14)
Bi (0,0)
Ai (1,14)
Bi (1,0)
Ai (2,14)
Bi (2,0)
…
Ai (3,14) Ai (0,15)
Bi (3,0)
Bi (0,1)
…
Ai (1,15)
Bi (1,1)
Ai (2,15)
Bi (2,1)
Ai (3,15)
Bi (3,1)
Bi - Individual Ta dependence (slope) of IR pixels offset
Bi (0,14)
(0,0)
Bi (1,14)
(1,0)
Bi (2,14)
(2,0)
…
Bi (3,14) Bi (0,15)
(3,0)
(0,1)
…
Bi (1,15)
(1,1)
Bi (2,15)
(2,1)
Bi (3,15)
(3,1)
Individual sensitivity coefficients
(0,14)
(1,14)
(2,14)
…
(3,14)
(0,15)
(1,15)
(2,15)
(3,15)
MELEXIS reserved
MELEXIS reserved
Compensation pixel coefficients
TGC Scale offset
PTAT
Common sensitivity coefficients
Emissivity
KsTa
MELEXIS reserved
MELEXIS reserved
Config register
OSC trim
Chip ID
Table 12: EEPROM map
Detailed descriptions of some of the EEPROM addresses are described here after:
D7
CP^_H
DF
K_T2_H
D6
CP^_L
D5
D4
D3
D2
D1
D0
EEPROM cell meaning
MELEXIS reserved
- MELEXIS reserved
A_CP - Compensation pixel individial offset
B_CP - Individual Ta dependence (slope) of the compensation pixel offset
- Sensitivity coefficient of the compensation pixel
Table 13: D0…D7 EEPROM cell meaning
DE
K_T2_L
DD
DC
DB
DA
D9
D8
EEPROM cell meaning
TGC - Thermal Gradien Coefficient
Bi_scale - Scaling coeficient of slope of IR pixels offset
V_th_H
V_th_L - Vth0 of absolute temperatire sensor
K_T1_H
K_T1_L - K_T1 of absolute temperatire sensor
- Kt2 of absolute temperatire sensor
Table 14: DF…D8 EEPROM cell meaning
3001090620
Rev 4.0
Page 23 of 40
Datasheet IR16x4
19 September 2012