General description (continued)
The MLX90614 is built from 2 chips developed and mana
General description (continued) The MLX90614 is built from 2 chips developed and manufactured by Melexis:
?
The Infra Red thermopile detector MLX81101
?
The signal conditioning ASSP MLX90302, specially designed to process the output of IR sensor.
The device is available in an i
ndustry standard TO-39 package.
Thanks to the low noise amplifier, high resoluti
on 17-bit ADC and powerful DSP unit of MLX90302 high
accuracy and resolution of the thermometer is achiev
ed. The calculated object and ambient temperatures are
available in RAM of MLX90302 with resolution of 0.01
?
C. They are accessible by 2 wire serial SMBus
compatible protocol (0.02°C resolution) or via 10-bi
t PWM (Pulse Width Modulated) output of the device.
The MLX90614 is factory calibrated in wide temperature ranges: -40 to 125
?
C for the ambient temperature
and -70 to 382.2
?
C for the object temperature. The 10-bit PWM
is as a standard configured to transmit
continuously the measured object temperature for an object temperature range of -20 to 120
?
C with an
output resolution of 0.14
?
C. The PWM can be easily customiz
ed for virtually any range desired by the
customer by changing the content of 2 EEPROM cells.
This has no effect on the factory calibration of the
device.
The PWM pin can also be configured to act as a thermal relay (input is To), thus allowing for an easy and
cost effective implementation in thermostats or te
mperature (freezing/boiling) alert applications. The
temperature threshold is user programmable. In an
SMBus system this feature can act as a processor
interrupt that can trigger reading all slaves
on the bus and to determine the precise condition.
As a standard, the MLX90614 is calibrated for an object
emissivity of 1. It can be easily customized by the
customer for any other emissivity
in the range 0.1-1.0 without the need
of recalibration with a black body.
The thermometer is available in 2 supply voltage options: 5V compatible or 3V (battery) compatible. The 5V
can be easily adopted to operate from a higher supply voltage (8-16V, for example) by use of few external
components (refer to “Applications
information” section for details).
An optical filter (long-wave pass) that
cuts off the visible and near infra-
red radiant flux is integrated in the
package to provide sunlight imGeneral description (continued)
The MLX90614 is built from 2 chips developed and manufactured by Melexis:
?
The Infra Red thermopile detector MLX81101
?
The signal conditioning ASSP MLX90302, specially designed to process the output of IR sensor.
The device is available in an i
ndustry standard TO-39 package.
Thanks to the low noise amplifier, high resoluti
on 17-bit ADC and powerful DSP unit of MLX90302 high
accuracy and resolution of the thermometer is achiev
ed. The calculated object and ambient temperatures are
available in RAM of MLX90302 with resolution of 0.01
?
C. They are accessible by 2 wire serial SMBus
compatible protocol (0.02°C resolution) or via 10-bi
t PWM (Pulse Width Modulated) output of the device.
The MLX90614 is factory calibrated in wide temperature ranges: -40 to 125
?
C for the ambient temperature
and -70 to 382.2
?
C for the object temperature. The 10-bit PWM
is as a standard configured to transmit
continuously the measured object temperature for an object temperature range of -20 to 120
?
C with an
output resolution of 0.14
?
C. The PWM can be easily customiz
ed for virtually any range desired by the
customer by changing the content of 2 EEPROM cells.
This has no effect on the factory calibration of the
device.
The PWM pin can also be configured to act as a thermal relay (input is To), thus allowing for an easy and
cost effective implementation in thermostats or te
mperature (freezing/boiling) alert applications. The
temperature threshold is user programmable. In an
SMBus system this feature can act as a processor
interrupt that can trigger reading all slaves
on the bus and to determine the precise condition.
As a standard, the MLX90614 is calibrated for an object
emissivity of 1. It can be easily customized by the
customer for any other emissivity
in the range 0.1-1.0 without the need
of recalibration with a black body.
The thermometer is available in 2 supply voltage options: 5V compatible or 3V (battery) compatible. The 5V
can be easily adopted to operate from a higher supply voltage (8-16V, for example) by use of few external
components (refer to “Applications
information” section for details).
An optical filter (long-wave pass) that
cuts off the visible and near infra-
red radiant flux is integrated in the
package to provide sunlight immunity.
tured by Melexis:
?
The Infra Red thermopile detector MLX81101
?
The signal conditioning ASSP MLX90302, specially designed to process the output of IR sensor.
The device is available in an i
ndustry standard TO-39 package.
Thanks to the low noise amplifier, high resoluti
on 17-bit ADC and powerful DSP unit of MLX90302 high
accuracy and resolution of the thermometer is achiev
ed. The calculated object and ambient temperatures are
available in RAM of MLX90302 with resolution of 0.01
?
C. They are accessible by 2 wire serial SMBus
compatible protocol (0.02°C resolution) or via 10-bi
t PWM (Pulse Width Modulated) output of the device.
The MLX90614 is factory calibrated in wide temperature ranges: -40 to 125
?
C for the ambient temperature
and -70 to 382.2
?
C for the object temperature. Thebit PWM
is as a standard configured to transmit
continuously the measured object temperature for an object temperature range of -20 to 120
?
C with an
output resolution of 0.14
?
C. The PWM can be easily customiz
ed for virtually any range desired by the
customer by changing the content of 2 EEPROM cells.
This has no effect on the factory calibration of the
device.
The PWM pin can also be configured to act as a thermal relay (input is To), thus allowing for an easy and
cost effective implementation in thermostats or te
mperature (freezing/boiling) alert applications. The
temperature threshold is user programmable. In an
SMBus system this feature can act as a processor
interrupt that can trigger reading all slaves
on the bus and to determine the precise condition.
As a standard, the MLX90614 is calibrated for an object
emissivity of 1. It can be easily customized by the
customer for any other emissivity
in the range 0.1-1.0 without the need
of recalibration with a black body.
The thermometer is available in 2 supply voltage options: 5V compatible or 3V (battery) compatible. The 5V
can be easily adopted to operate from a higher supply voltage (8-16V, for example) by use of few external
components (refer to “Applications
information” section for details).
An optical filter (long-wave pass) that
cuts off the visible and near infra-
red radiant flux is integrated in the
package to provide sunlight immunity