MLX90632 FIR sensor Datasheet
calibrated with calibration constants stored in the EEPROM memory. The ambient and object temperature can
be calculated based on these calibration constants and the measurement data.
The MLX90632 is factory calibrated in the ambient temperature range from -20 to 85˚C and from -20 to 200˚C for
the object temperature range. The measured value is the average temperature of all objects in the Field Of View
of the sensor.
It is very important for the application designer to understand that these accuracies are guaranteed and
achievable when the sensor is in thermal equilibrium and under isothermal conditions (no temperature
differences across the sensor package).
The accuracy of the thermometer can be influenced by temperature differences in the package induced by
causes like (among others): Hot electronics behind the sensor, heaters/coolers behind or beside the sensor or by
a hot/cold object very close to the sensor that not only heats the sensing element in the thermometer but also
the thermometer package.
A major strength of the MLX90632 is that the measured effect of these temperature differences around the
sensor package is reduced to a minimum by the internal measurement algorithm.
In the same way, localized thermal variations -like turbulence in the air- will not generate thermal noise in the
output signal of the thermopile.
However, some extreme cases will influence the sensor.
The typical supply voltage of the MLX90632 is 3.3V. The communication with the chip is done by I
2
C in fast mode
plus (FM+). Through I
2
C the external microcontroller has access to the following blocks:
RAM memory used for measurement data
EEPROM used to store the trimming values, calibration constants and device/measurement settings
Register to control the sensor
Based on this data, the external microcontroller can calculate the object temperature and if needed the sensor
temperature.
An optical filter (long-wave pass) that cuts off the visible and near infrared radiant flux is integrated in the sensor
to provide ambient light immunity. The wavelength pass band of this optical filter is from 2 till 14µm.
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MLX90632 、 J-STD-020 、 JESD22-A113 、 EN60749-20 、 EN60749-15 、 JESD22-B102 、 EN60749-21 、 MLX90632SLD-BCB-000-SP 、 MLX90632SLD-BCB-000-RE |
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[ Non-contact temperature measurements ][ Temperature sensing element for residential, commercial and industrial building air conditioning ][ Industrial temperature control of moving parts ][ Home appliances with temperature control ] |
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Datasheet |
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ESD(CDM 750V) 、 ESD(HBM 2KV) 、 RoHS 、 lead free |
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Please see the document for details |
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SFN 3x3 |
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English Chinese Chinese and English Japanese |
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DECEMBER 1, 2017 |
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REVISION 2 |
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2.3 MB |
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