MLX90614ESF-ACC Melexis Inc, MLX90614ESF-ACC Datasheet - Page 24

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MLX90614ESF-ACC

Manufacturer Part Number
MLX90614ESF-ACC
Description
INFRARED THERMOMETER
Manufacturer
Melexis Inc
Datasheet

Specifications of MLX90614ESF-ACC

Function
Thermometer, Thermostat
Topology
ADC (Sigma Delta), Voltage Regulator
Sensor Type
Internal
Sensing Temperature
-40°C ~ 85°C
Output Type
PWM, SMBus™
Output Alarm
No
Output Fan
No
Voltage - Supply
4 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
TO-39
For Use With
EVB90614 - BOARD EVAL FOR MLX90614
Lead Free Status / RoHS Status
Vendor undefined / Vendor undefined
Other names
Q4002160

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MLX90614ESF-ACC-000-TU
Manufacturer:
MELEXIS/迈来芯
Quantity:
20 000
Configuration: Sensor1 = Ta, Sensor2 = T
Ta
Ta
To
To
Captured high durations are:
8.5.3 Customizing the temperature range for PWM output
The calculated ambient and object temperatures are stored in RAM with a resolution of 0.01 ° C (16 bit). The
PWM operates with a 10-bit word so the transmitted temperature is rescaled in order to fit in the desired
range.
For this goal 2 cells in EEPROM are foreseen to store the desired range for To (To
Ta (Ta
Thus the output range for To can be programmed with an accuracy of 0.01 ° C, while the corresponding Ta
range can be programmed with an accuracy of 0.64 ° C.
The object data for PWM is rescaled according to the following equation:
The T
and the result is a 10-bit word, in which 0x000h corresponds to To
and 1LSB corresponds to
The ambient data for PWM is rescaled according to the following equation:
The result is a 10-bit word, where 000h corresponds to -38.2 ° C (lowest Ta that can be read via PWM), 3FFh
corresponds to 125 ° C (highest Ta that can be read via PWM) and 1LSB corresponds to
3901090614
Rev 006
T
T
T
T
T
T
T
T
Example (see Figure 15 above):
The temperature is calculated as follows:
ambient
object
PWM
PWM
MIN
MAX
MIN
MAX
min
max
min
max
EEPORM
EEPORM
= 0° C
= 0° C
EEPORM
EEPORM
obj
ambient
= +60° C
= +50° C
1
RAM
range
=
=
=
Sensor 1 – t = 16.875ms at period T = 100ms thus the duty cycle is
Sensor 2 – t = 73.125ms at period T = 100ms thus the duty cycle is
. 4
is the linearized Tobj, 16-bit (0x0000…0xFFFF, 0x0000 for -273.15° C and 0xFFFF for +382.2° C)
. 4
T
=
: the 8MSB are foreseen for Ta
=
=
=
=
(
RAM
(
Duty
T
Duty
T
[
T
[
T
RAM
T
MIN
K
MAX
MIN
MAX
K
=>
=>
=>
=>
PWM
T
S
PWM
S
2
1
MIN
100
T
100
obj
(
MIN
ambient
(
EEPROM
Start
Start
38
LSB
Ta
Ta
Ta
To
To
EEPROM
38
LSB
2 .
To
range
range
range
min
max
2 .
,
. 1
. 2
)
K
)
]
)
)
MAX
[EEPROM 0x01] = 100 * (To
[EEPROM 0x00] = 100 * (To
,
]
(
, L [EEPROM] = 100*(Ta
,H [EEPROM] = 100*(Ta
(
T
[EEPROM 0x03]=0x993C
PWM
T
K
1023
100
A
O
64
100
PWM
_
64
_
MAX
obj
MAX
To
LSB
ambient
=
obj1
LSB
MIN
T
T
=> Config Reg[5:4] = 00b,
T
MAX
max
A
[° C]
O
=
_
_
MIN
and the 8LSB for Ta
EEPROM
MIN
T
MAX
Page 24 of 49
)
1023
)
+
+
EEPROM
T
T
T
max
min
A
O
1023
MIN
_
_
+38.2)/64 = 0x3C,
+38.2)/64 = 0x99,
MIN
min
max
MIN
EEPROM
T
+ 273.15) = 0x6AB3
+ 273.15) = 0x7E3B
=
MIN
=
Infra Red Thermometer in TO-39
. 4
. 4
EEPROM
(
. 0
(
. 0
min
16875
MIN
73125
).
[° C], 0x3FFh corresponds to To
Duty
Duty
S
S
. 0
1
. 0
2
0625
Single and Dual Zone
=
=
5625
16
73
100
100
.
)(
.
875
)(
125
min
60
50
and To
=
=
0
T
September 30, 2010
. 0
0
. 0
)
MAX
)
+
16875
73125
+
1023
0
max
0
=
) and one for
=
T
25
MIN
Data Sheet
33
MAX
5 .
.
75
[° C]
°
[° C]
C
°
C

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