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PDF MLX90614 Data sheet ( Hoja de datos )
| Número de pieza | MLX90614 | |
| Descripción | Single and Dual Zone Infra Red Thermometer | |
| Fabricantes | Melexis | |
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Features and Benefits
Small size, low cost
Easy to integrate
Factory calibrated in wide temperature range:
-40 to 125 ˚C for sensor temperature and
-70 to 380 ˚C for object temperature.
High accuracy of 0.5°C over wide temperature
range (0..+50°C for both Ta and To)
High (medical) accuracy calibration optional
Measurement resolution of 0.02°C
Single and dual zone versions
SMBus compatible digital interface
Customizable PWM output for continuous
reading
Available in 3V and 5V versions
Simple adaptation for 8 to 16V applications
Power saving mode
Different package options for applications and
measurements versatility
Automotive grade
MLX90614 family
Single and Dual Zone
Infra Red Thermometer in TO-39
Applications Examples
High precision non-contact temperature
measurements;
Thermal Comfort sensor for Mobile Air
Conditioning control system;
Temperature sensing element for residential,
commercial and industrial building air
conditioning;
Windshield defogging;
Automotive blind angle detection;
Industrial temperature control of moving parts;
Temperature control in printers and copiers;
Home appliances with temperature control;
Healthcare;
Livestock monitoring;
Movement detection;
Multiple zone temperature control – up to 100
sensors can be read via common 2 wires
Thermal relay/alert
Body temperature measurement
Ordering Information
Part No. MLX90614 X X X
(1) (2) (3)
(1) Supply Voltage:
A - 5V power
(adaptable for 12V)
B - 3V power
(2) Number of thermopiles:
A – single zone
B – dual zone
(3) Package type:
A – Filter inside
B – Filter outside
1 Functional diagram
MLX90614Axx: Vdd=4.5...5.5V
J1
SCL
1 MLX90614
SCL U1
Vz
SDA
PWM
2 SDA
Vss 4
Vdd
GND
Vdd
3
C1
CON1
0.1uF
C1 value and type may differ
in different applications
for optimum EMC
MLX90614 connection to SMBus
Figure 1 Typical application schematics
3901090614
Rev 1.0
2 General Description
The MLX90614 is an Infra Red thermometer for non
contact temperature measurements. Both the IR sensitive
thermopile detector chip and the signal conditioning ASSP
are integrated in the same TO-39 can.
Thanks to its low noise amplifier, 17-bit ADC and powerful
DSP unit, a high accuracy and resolution of the
thermometer is achieved.
The thermometer comes factory calibrated with a digital
PWM and SMBus output.
As a standard, the 10-bit PWM is configured to
continuously transmit the measured temperature in range
of -20 to 120 ˚C, with an output resolution of 0.14 ˚C.
The POR default is SMBus interface
Page 1 of 35
Data Sheet
14/Sep/2006
Free Datasheet http://www.datasheet4u.net/
1 page  
5 Pin definitions and descriptions
MLX90614 family
Single and Dual Zone
Infra Red Thermometer in TO-39
2 - PWM/
SDA
3 - VDD
1 - SCL/
Vz
4 - VSS
Top view
Figure 2: Pin description
Pin Name
VSS
SCL / Vz
PWM / SDA
VDD
Function
Ground. The metal can is also connected to this pin.
Serial clock input for 2 wire communications protocol. 5.7V zener
is available at this pin for connection of external bipolar transistor
to MLX90614A to supply the device from external 8 -16V source.
Digital input / output. In normal mode the measured object
temperature is available at this pin Pulse Width Modulated.
External supply voltage.
Table 2: Pin description MLX90614
Note: for +12V (+8…+16V) powered operation refer to the Application information section. For EMC and
isothermal conditions reasons it is highly recommended not to use any electrical connection to the metal can
except by the Vss pin.
With the SCL/Vz and PWM/SDA pins operated in 2-wire interface mode, the input Schmidt trigger function is
automatically enabled.
3901090614
Rev 1.0
Page 5 of 35
Data Sheet
14/Sep/2006
Free Datasheet http://www.datasheet4u.net/
5 Page 
MLX90614 family
Single and Dual Zone
Infra Red Thermometer in TO-39
7.3 Block description
7.3.1 Amplifier
A low noise low offset amplifier with programmable gain is implemented for amplification of the IR sensor
voltage. With a carefully designed input modulator and balanced input impedance, an offset as low as 0.5µV
is achieved.
7.3.2 Supply regulator and POR
The module can operate from 2 different supplies:
VDD= 5V => MLX90614Axx
VDD=3.3V => MLX90614Bxx (battery or regulated supply)
Refer to “Applications information” section for information about adopting higher voltage supplies.
The Power On Reset (POR) is connected to Vdd supply. The on-chip POR circuit provides an active (high)
level of the POR signal when the Vdd voltage rises above approximately 0.5V and holds the entire
MLX90614xxx in reset until the Vdd is higher than the specified POR threshold VPOR (note that this level is
different for MLX90614Axx and MLX90614Bxx). During the time POR is active, the POR signal is available as
an open drain (active high) at the PWM/SDA pin. After the MLX90614xxx exits the POR condition, the
function programmed in EEPROM takes precedence for that pin.
7.3.3 EEPROM
A limited number of addresses in the EEPROM memory can be changed by the customer. The whole
EEPROM can be read via SMBus interface.
EEPROM (32X16)
Name
Address Write acces
Tomax
Tomin
PWMCTRL
Ta range
000h
001h
002h
003h
Yes
Yes
Yes
Yes
Ke
004h
Yes
Config Register1
005h
Yes
Melexis reserved
006h
No
… ……
Melexis reserved
00Dh
No
SMBus address
00Eh
Yes
Melexis reserved
00Fh
Yes
Melexis reserved
010h
No
… ……
Melexis reserved
018
No
Melexis reserved
019h
Yes
Melexis reserved
01Ah
No
Melexis reserved
01Bh
No
ID number
01Ch
No
ID number
ID number
01Dh
01Eh
No
No
ID number
01Fh
No
The addresses Tomax, Tomin and Ta range are for customer dependent object and ambient temperature
ranges. For details see point 7.5.3 below in this document
3901090614
Rev 1.0
Page 11 of 35
Data Sheet
14/Sep/2006
Free Datasheet http://www.datasheet4u.net/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MLX90614.PDF ] | |
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