Data Sheet
MLX90640 32x24 IR array
Datasheet
Page 36 of 60
REVISION 11 – 3 AUGUST 2018
@YXoF³ZOo•
f]RR
%
™cdbl2_dn
šš
%
™cdbl2_dn
™š´
%
8
%
8
In case the ADC resolution is changed the one must multiply the @YXoF³ZOo•
f]RR
coefficient with the RAM data for VDD
only. Please note that the data for Vbe, PTAT and IR pixels (including CP)
must
not be changed.
11.2.2.2.
11.2.2.2.11.2.2.2.
11.2.2.2. Supply voltage value calculation
Supply voltage value calculationSupply voltage value calculation
Supply voltage value calculation
(common for all pixels)
(common for all pixels)(common for all pixels)
(common for all pixels)
#
}Sr]ghƒw]j
ad11
!}D¶
>p>¸%D
7
¹¹
89
;
,¹¹
<#
>
Where: Constants calculation of the EEPROM stored values (can be done just once after POR)
º$ N
º$
If
ºº
!
"
ºº! N
#»»
%"
º$ N N
#»»
%"
&
#»»
%"
'
!
"
(
!Nº
VDD calculations:
@AB
A
===
If NN @AB
A
LSB
#
!7("7
&
7(>"‹
'
7(‹
<¼
7"¬
7(‹
<¼½¼N <¼½¼º#
11.2.2.3.
11.2.2.3.11.2.2.3.
11.2.2.3. Ambient temperature calculation
Ambient temperature calculationAmbient temperature calculation
Ambient temperature calculation
(common for all pixels)
(common for all pixels)(common for all pixels)
(common for all pixels)
)
*
+
,
-./.
012
345
,
-./.
!6,
7
-./.
89
:
;
.
-./.
<, °C
Where:
-./.
=
>
º=
>
If ¾
-./.
-./.
-./.
%
º
¼º
?
-./.
ºN
If N¾
?
-./.
N
?
-./.
?
-./.
(
N
N
¼
6#
@AB
A
#»»
%"