ETC MLX90601KZA-CKA

MLX90247 family
Discrete Infrared Thermopile Detectors
Features and Benefits
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Solid state thermopile sensor
On-chip thermistor for ambient temperature compensation
High reliability and long-term stability
Very high ESD protection – 7 kV on all pins (only for
MLX90247BAA and MLX90247BAL)
Low cost, small size
Ordering Information
Part No
Ta
Suffix
Package code
MLX90247
E (-40C to +85C)
SF(TO-39)
MLX90247
E (-40C to +85C)
SF(TO-39)
MLX90247
E (-40C to +85C)
SF(TO-39)
MLX90247
E (-40C to +85C)
SF(TO-39)
Type Description
Large aperture (3.5mm) thermopile detector with on-chip PTC
DSA
thermistor, floating thermopile outputs.
Small aperture (2.5mm) thermopile detector with on-chip PTC
DSL
thermistor, floating thermopile outputs.
Large aperture (3.5mm) thermopile detector with on-chip PTC
BAA
thermistor, floating thermopile outputs. Excellent ESD
Small aperture (2.5mm) thermopile detector with on-chip PTC
BAL
thermistor, floating thermopile outputs. Excellent ESD
Notice: In case sensor is used in automotive applications, Melexis must be informed.
Applications
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Automotive contactless temperature sensing.
IR thermometers
Gas analysis equipment
Occupancy detection
1. Functional Diagram
60 kOhm
1 Out IR+
40 uV/K
3 Out IRThermopile
2 Rsense
24 kOhm
4
PTC
Socket
3901090247
Rev. 003
VSS
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 between the object and the sensor.
Measurement of the absolute temperature of the object is
possible by relating the thermopile signal to the
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.
The MLX90247DSL (BAL) sensor IC is similar to
MLX90247DSA (BAA) but with smaller aperture, thus
resulting in narrower field of view (FOV).
Page 1 of 10
Data Sheet
Jun/04
MLX90247 family
Discrete Infrared Thermopile Detectors
Table of contents
1.
FUNCTIONAL DIAGRAM ............................................................................................................. 1
2.
DESCRIPTION............................................................................................................................... 1
3.
GLOSSARY OF TERMS ............................................................................................................... 3
4.
PIN DEFINITIONS AND DESCRIPTIONS .................................................................................... 3
5.
MLX90247 SPECIFICATIONS ...................................................................................................... 3
6.
UNIQUE FEATURES..................................................................................................................... 5
7.
APPLICATIONS INFORMATION.................................................................................................. 6
8.
RELIABILITY INFORMATION ...................................................................................................... 7
9.
ESD PRECAUTIONS .................................................................................................................... 7
10.
PACKAGE INFORMATION........................................................................................................... 8
11.
DISCLAIMER............................................................................................................................... 10
3901090247
Rev. 003
Page 2 of 10
Data Sheet
Jun/04
MLX90247 family
Discrete Infrared Thermopile Detectors
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)
4. Pin Definitions and Descriptions
TO-39 package - connections
1
Pin
Symbol
Description
OutIr+
Infrared Thermopile positive output
Rsens
Thermistor for sensor ambient temperature
measurement
3
OutIr-
Infrared Thermopile negative output
4
Vss
Thermistor ground / case potential
1
2
4
2
3
Top view = pins down
5. MLX90247 Specifications
Operating temperature range: Ta = -40 to 125 ˚C unless otherwise noted
Parameter
Type
Typical
Units
Sensitive Area
All
1.2 x 1.2
mm2
DC membrane responsitivity
All
12
Sensitivity
DSA and BAA
Window aperture size
Field of view
Spectral sensitivity
Condition
V/W
Tbb = 25˚C
46
±25%
µV/˚C
Full FOV
DSL and BAL
34
±25%
µV/˚C
Full FOV
DSA and BAA
3.5
mm
DSL and BAL
2.5
mm
DSA and BAA
100
deg
DSL and BAL
85
deg
All
> 70
%
7.5µm < λ < 13.5µm
<1
%
0 < λ < 5µm
90% of energy
Thermopile Resistance
All
60
kΩ
Ta = 25˚C
Noise
All
32
nV / √Hz
RMS, Ta = 25˚C
3901090247
Rev. 003
Page 3 of 10
Data Sheet
Jun/04
MLX90247 family
Discrete Infrared Thermopile Detectors
NEP
All
2.6
nW / √Hz
Time constant
All
30
ms
Sensitivity TC
All
0.1
Thermistor value
All
24
Thermistor TC 1
All
6500
Thermistor TC 2
All
16
ppm/˚C2
DSA and DSL
700
V
BAA and BAL
7000
V
Withstand ESD voltage
RMS, Ta = 25˚C
% / ˚C
kΩ
±30%
Ta = 25˚C
ppm/˚C
±20%
typical
NOTE: The thermistor resistance can be calculated using following expresion:
[
R(T ) = R(25o C ) 1 + TC1 (T − 25o C ) + TC2 (T − 25o C ) 2
]
Note:
Due to the strong ESD protection BAA and BAL versions can only be used with CM (Common Mode) = 0V
for IR outputs. 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 (DSA and DSL
versions).
Internal schematics
BAA and BAL
DSA and DSL
Thermopile
Thermopile
30 kOhm
30 kOhm
1
1
220 Ohm
220 Ohm
20 uV/K
Not
connected
20 uV/K
Not
connected
220 Ohm
220 Ohm
20 uV/K
3
20 uV/K
3
220 Ohm
30 kOhm
220 Ohm
2
2
480 Ohm
480 Ohm
24 kOhm
4
24 kOhm
4
CASE
3901090247
Rev. 003
30 kOhm
CASE
Page 4 of 10
Data Sheet
Jun/04
MLX90247 family
Discrete Infrared Thermopile Detectors
Absolute Maximum Ratings
Parameter
Storage Temperature Range
Applied DC voltage
Applied DC voltage
Version
Units
All
-55 ÷150
BAA and BAL
-0.5 ÷ 0.5
DSA and DSL
-0.5 ÷ 12
BAA and BAL
-0.5 ÷ 12
DSA and DSL
-0.5 ÷ 12
Remark
°C
V
Pins 1 and 3 to ground (pin4)
V
Pin 2 to ground (pin4)
Exceeding the absolute maximum ratings may cause permanent damage.
maximum-rated conditions for extended periods may affect device reliability.
Exposure to absolute-
6. Unique features
-
Fully CMOS compatible process
High reliability
Suitable for automotive applications
Extremely high ESD resistance: 7 kV
Thermistor integrated in silicon edge of the sensor: closest possible following of sensor
temperature
3901090247
Rev. 003
Page 5 of 10
Data Sheet
Jun/04
MLX90247 family
Discrete Infrared Thermopile Detectors
7. Applications information
As shown in the internal schematics drawings in paragraph 5, the MLX90247BAA and BAL use a die with
additional protection diodes for very high ESD performance. The configuration of the protection diodes is
such that the MLX90247BAA and BAL can only be biased around ground potential.
The output voltage of the thermopile is positive when the object is at higher temperature than the sensor;
it is 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 common mode 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;Vdd-3V]
IR+
IRRsens
VSS
VDD
5V
IRINP
C3
IRINN
TEMPOUT
TEMPOUT
TINP
IROUT
IROUT
TINN
MLX90247
MLX90313
CREF
VSS
CS
SCLK
SDI
SDO
CS
SCLK
DIN
DOUT
REL1
REL
VREFP
VREF
VSS/GND
R3
MLX90601KZA-CKA
MLX90601KZA-CKD
MLX90601KZA-CLA
R3 = 100kΩ
C3 = 10µF
Using the MLX90247DSA or DSL, the ESD performance is lower, but there is the possibility to apply a
non-zero bias voltage Vref to the thermopile. The figure below shows a typical application with the
AD8628 low-offset low-drift differential opamp of Analog Devices. The AD8628 has single voltage supply,
and can only accept positive common mode input signals. This application is not possible with the
M:X90247BAA or BAL, as the BAA and BAL cannot be biased with Vref.
100kΩ
100Ω
5V
+
Vref
3901090247
Rev. 003
60kΩ
AD8628
MLX90247DSA
Vthermopile
Page 6 of 10
Data Sheet
Jun/04
MLX90247 family
Discrete Infrared Thermopile Detectors
8. Reliability Information
Melexis Infrared sensors are sealed to withstand a fine and gross leak test according MIL883 Method
1014 (Seal) / JESD22-A109 (Hermeticity).
Please contact Melexis for specific information using MLX90247 sensors in automotive applications.
9. ESD Precautions
Electronic semiconductor products are sensitive to Electro Static Discharge (ESD).
Always observe Electro Static Discharge control procedures whenever handling semiconductor products.
3901090247
Rev. 003
Page 7 of 10
Data Sheet
Jun/04
MLX90247 family
Discrete Infrared Thermopile Detectors
10.
Package information
Housing specifications (TO39)
Metal cap
Welded
TO39 header
Au plating
Filling gas
Nitrogen
Marking
Part No
Type
Package Code
Marking
MLX90247
DSA
SF(TO-39), 3,5mm
MLX90247B PTC FO XXXZZ
MLX90247
DSL
SF(TO-39), 2,5mm
MLX90247H PTC FO XXXZZ
MLX90247
BAA
SF(TO-39), 3,5mm
MLX90247BAA YYWW
MLX90247
BAL
SF(TO-39), 2,5mm
MLX90247BAL YYWW
XXX- last digits of lot number
ZZ – wafer number
YYWW – date code with YY- year, WW- week of assembly
Position of membrane in housing
3901090247
Rev. 003
Page 8 of 10
Data Sheet
Jun/04
MLX90247 family
Discrete Infrared Thermopile Detectors
Package Outline
DSL and BAL
DSA and BAA
3901090247
Rev. 003
Page 9 of 10
Data Sheet
Jun/04
MLX90247 family
Discrete Infrared Thermopile Detectors
11.
Disclaimer
Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in
its Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the
information set forth herein or regarding the freedom of the described devices from patent infringement.
Melexis reserves the right to change specifications and prices at any time and without notice. Therefore,
prior to designing this product into a system, it is necessary to check with 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.
The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall not
be liable to recipient or any third party for any damages, including but not limited to personal injury,
property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or
consequential damages, of any kind, in connection with or arising out of the furnishing, performance or
use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow
out of Melexis’ rendering of technical or other services.
© 2002 Melexis NV. All rights reserved.
For the latest version of this document, go to our website at:
www.melexis.com
Or for additional information contact Melexis Direct:
Europe and Japan:
Phone: +32 13 67 04 95
E-mail: [email protected]
All other locations:
Phone: +1 603 223 2362
E-mail: [email protected]
ISO/TS16949 and ISO14001 Certified
3901090247
Rev. 003
Page 10 of 10
Data Sheet
Jun/04