MLX90247ESF-DSA Melexis Inc, MLX90247ESF-DSA Datasheet

IC SENS THERMOPILE W/THERM TO-39

MLX90247ESF-DSA

Manufacturer Part Number
MLX90247ESF-DSA
Description
IC SENS THERMOPILE W/THERM TO-39
Manufacturer
Melexis Inc

Specifications of MLX90247ESF-DSA

Rohs Status
RoHS non-compliant
Sensing Temperature
-40°C ~ 85°C
Output Type
Voltage
Package / Case
TO-39
Other names
MLX90247-ESF-DSA
MLX90247-ESF-DSA
MLX90247ESF-B
MLX90247ESF-B
MLX90247LRA-B
Features and Benefits
Ordering Information
P a r t N o
Notice: In case sensor is used in automotive applications, Melexis must be informed.
Applications
1. Functional Diagram
3901090247
Rev. 004
Solid state thermopile sensor
On-chip thermistor for ambient temperature compensation
High reliability and long-term stability
Low cost, small size
Automotive contactless temperature sensing.
IR thermometers
Gas analysis equipment
Occupancy detection
40 uV/K
24 kOhm
Thermopile
E (-40C to +85C)
PTC
60 kOhm
T a
Socket
Suffix
1
3
2
4
Out IR+
Rsense
P a c k a g e c o d e
Out IR-
VSS
(TO-39)
2. Description
At the heart of the MLX90247 thermopile sensors is a
silicon die with a central micromachined membrane
surrounded by a bulk silicon edge. The hot junctions of the
thermopile are positioned near the center of the membrane
and the cold junctions are located above the bulk silicon
edge. Infrared irradiation of the low thermal conductivity
membrane creates a temperature difference between the
membrane and the surrounding bulk silicon. The resulting
thermopile voltage is a function of the temperature
difference
Measurement of the absolute temperature of the object is
possible by relating the thermopile signal
temperature of the sensor. The exact temperature of the
sensor is measured by a PTC thermistor integrated in the
bulk silicon edge. No supply voltage is needed for the
thermopile.
The sensor and thermistor can be used independently of
each other if desired, as the thermopile potential is floating.
Discrete Infrared Thermopile Detectors
T y p e
Page 1 of 9
D e s c r ip t io n
between
the
object
and
the
Data Sheet
sensor.
to the
Oct/07

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MLX90247ESF-DSA Summary of contents

Page 1

... The resulting thermopile voltage is a function of the temperature Rsense difference between Measurement of the absolute temperature of the object is possible by relating the thermopile signal temperature of the sensor. The exact temperature of the VSS sensor is measured by a PTC thermistor integrated in the bulk silicon edge ...

Page 2

Table of contents 1. FUNCTIONAL DIAGRAM..........................................................................................................1 2. DESCRIPTION..........................................................................................................................1 3. GLOSSARY OF TERMS ...........................................................................................................3 4. PIN DEFINITIONS AND DESCRIPTIONS .................................................................................3 5. MLX90247 SPECIFICATIONS...................................................................................................4 6. ABSOLUTE MAXIMUM RATINGS ............................................................................................5 7. UNIQUE FEATURES.................................................................................................................5 8. APPLICATIONS INFORMATION ..............................................................................................6 9. RELIABILITY INFORMATION...................................................................................................7 10. ESD PRECAUTIONS ...

Page 3

... Glossary of Terms IR: Infrared. Every object emits infrared radiation in relation to its temperature. This effect can be used to measure the temperature without the need for physical contact. PTC: On-chip thermistor which resistance increases with rising temperature (Positive Thermal Coefficient Black body (object temperature Ambient (die) temperature a 4 ...

Page 4

... Vir = Alpha .[ (T ) – where To is the measured object temperature, both To and Ta are in Kelvins Note: When measuring resistances with an ohm meter, please take care that the internal protection diodes, as indicated in the functional diagram below, are always reverse biased. 3901090247 Rev. 004 Discrete Infrared Thermopile Detectors ± ...

Page 5

... Unique features - Fully CMOS compatible process - High reliability - Suitable for automotive applications - Thermistor integrated in silicon edge of the sensor: closest possible sensing of sensor temperature 3901090247 Rev. 004 Discrete Infrared Thermopile Detectors ° Page Data Sheet ...

Page 6

... The output voltage of the thermopile is positive when the object is at higher temperature than the sensor negative when the object is at lower temperature than the sensor. As the output voltage can become positive as well as negative, the sensor has to be connected to a differential amplifier that can accept both positive and negative input signals. The figure below shows a solution using the MLX90313 infrared sensor interface chip, which accepts common mode input voltages in the range [-0.1V ...

Page 7

Reliability Information Melexis Infrared sensors are sealed to withstand a fine and gross leak test according MIL 883 Method 1014 (Seal)/ JEDEC-STD-22 Test Method A 109 (Hermeticity). For more information on manufacturability / solderability see quality page at our ...

Page 8

Position of membrane in housing Package Outline 3901090247 Rev. 004 Discrete Infrared Thermopile Detectors Page Data Sheet Oct/07 ...

Page 9

... Melexis for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by Melexis for each application ...

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