TSEV0108L39 Thermopile Sensor Module
TSEV0108L39 Rev E3 www.meas-spec.com 2012-05-29
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Contact less Temperature Measurement
8 Measurement Pixels
Wide Supply Voltage Range
Digital Interface Bus (SPI)
DESCRIPTION
TSEV0108L39 is a contact-less temperature measuring system for OEM use based on the
detection of infrared radiation.
TSEV0108L39 is equipped with an infrared sensor (Thermopile) in front. In this version a
Thermopile Array, including 8 pixels, is used. It has to be pointed at the target object
The basic working principle is:
Detection of infrared radiation with a Thermopile sensor
Determination of sensor temperature using a thermistor
Calculation of ambient and object temperature using a processing unit
Providing the temperatures at digital output bus (SPI like Interface)
FEATURES APPLICATIONS
-20°C – +120°C Measurement Range Contact less Temperature Measurement
4V – 16V Supply Voltage Range Microwave Oven
Up to 2°C Accuracy Climate Control
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ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are limiting values of permitted operation and should never be exceeded under the worst
possible conditions either initially or consequently. If exceeded by even the smallest amount, instantaneous
catastrophic failure can occur. And even if the device continues to operate satisfactorily, its life may be considerably
shortened.
Parameter Symbol Conditions Min Typ Max Unit
Supply Voltage Vcc Measured versus GND -0.3 16 V
Operating Temperature Top -10 +85 °C
Storage Temperature Tstor -30 +85 °C
Humidity HumL-30°C - +50°C 85 %
Humidity HumH+50°C - +85°C 50 %
SENSOR CHARACTERISTICS
If not otherwise noted, 25°C ambient temperature, 5V supply voltage were applied.
OPERATING CONDITIONS
INTERFACE CHARACTERISTICS
OPERATIONAL CHARACTERISTICS
1) Valid for a distance of 100mm and black body size of 150mm x 150mm.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Total Field of View T_FOV Over all 8 Pixels 40 °
Individual Field of View P_FOV Field of View of one Pixel 3.5 °
Focal length f 3.9 mm
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Supply voltage Vcc Measured versus GND 4 5 6 V
Supply Current I Full ambient temp. range, no
output load 10 15 mA
Humidity HumL-30°C - +50°C 85 %
Humidity HumH+50°C - +85°C 50 %
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Clock Rate (SPI) FSPI 100 kHz
Data Output Rate
(New Measurement Data of all 8
Pixels available)
Fout 1 Hz
Paramete
r
Symbol
Conditions
Min
Typ
Max
Unit
Object Temperature Range Tobj -20 +120 °C
Ambient Temperature Range Tamb 0 +85 °C
Resolution Res 0.1 °C
Standard Start-Up Time tStart Time from turning on supply
to first measurement 3 5 s
Accuracy tolerance when
Tambient = 25°C ±5°C ΔT-5°C < Tobject < +5°C ±2
1
)
°C
Outside above range ±4
1
)
°C
TSEV0108L39 Thermopile Sensor Module
TSEV0108L39 Rev E3 www.meas-spec.com 2012-05-29
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MECHANICAL DIMENSIONS
Only use hatched areas for mechanical assembly (screws, nuts, etc).
TERMINALS
Connector: JST B5B-PH-K-S(LF)(SN)
Pin
Name
Desription
Type
1 GND Supply Ground Supply
2 MISO Data Out Output
3 MOSI Data In Input
4 CLK Clock Input
5 VDD Supply Voltage Supply
1 5
TSEV0108L39 Thermopile Sensor Module
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BLOCK DIAGRAM
Thermopile
MCU
SPI like
Interface
8 T hermopile Sensors
Supply
Clk
MOSI
MISO
FIELD OF VIEW
ANGLE OF PIXELS
12345678
19,03 13,84 8,41 2,82 -2,82 -8,41 -13,84 -19,03
TSEV0108L39 Thermopile Sensor Module
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FUNCTION
SPI INTERFACE
PHYSICAL INTERFACE PARAMETERS
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Baudrate FSPI 10 200 kHz
Data Bits 8
Edge Rising
Chip Select No
Input Voltage Low 0.8 V
Input Voltage High 2.8 3.6 V
Output Current High @ 2.8V 1 mA
Output Current Low @ 0.8V 1 mA
SPI CONNECTION
Master TSEV0108L39
GND
MISO
MOSI
CLK
GND
MISO
CLK
MOSI
SPI SIGNAL TIMING DESCRIPTION
CLK
7 6 5 4 3 2 1 0
MOSI
7 6 5 4 3 2 1 0
MISO
MSB LSB
MOSI = Master Out
Slave In
MISO = Master In
Slave Out
TSEV0108L39 Thermopile Sensor Module
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INTERNAL RESET
The internal SPI status is reset to idle state if one of the following conditions occur:
100ms without receiving data
Reset due to cycling of supply voltage
FILTER CIRCUITRY
Capacitors are added to the following lines in to reduce noise/spikes in order to provide
stable SPI transmission even in EMC affected environment:
CLK
MOSI
A 10nF capacitor is added parallel to ground potential.
SPI SIGNAL SEQUENCE
Reading Temperature of Pixel 1
Nr.
MOSI
MISO
Direction
Description
1 0xA1 --- M S Sending Command (See Command Reference)
Wait at least 150us to arrange temperature data
2 0XFF 0xXX M S Receiving High Byte (Send 0xFF while receiving)
Wait at least 150us to arrange temperature data
3 0XFF 0xXX M S Receiving Low Byte (Send 0xFF while receiving)
EXAMPLE FOR 5V SPI INTERFACE LINE
The sensor can not be connected directly to a SPI interface with 5V levels. Therefore the
following circuitry is suggested. The Baudrate should be limited to 20kHz.
Master TSEV0108
GND
MISO
MOSI
CLK
GND
MISO
CLK
MOSI
1kOhm
1kOhm
2kOhm
2kOhm
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AMBIENT AND OBJECT MEASUREMENT
Please refer following table for SPI commands to read object temperature and ambient
temperature. Both values are transmitted in tenth of degrees.
All temperature read outs are to be interpreted as twos complement.
Com Description Reply Bytes
0xA0 Sensor Temperature Sensor temperature in hundredth of degrees Celsius 2
0xA1 Temperature Pixel 1 Temp. at pixel position 1 in tenth of degree Celsius 2
0xA2 Temperature Pixel 2 Temp. at pixel position 2 in tenth of degree Celsius 2
0xA3 Temperature Pixel 3 Temp. at pixel position 3 in tenth of degree Celsius 2
0xA4 Temperature Pixel 4 Temp. at pixel position 4 in tenth of degree Celsius 2
0xA5 Temperature Pixel 5 Temp. at pixel position 5 in tenth of degree Celsius 2
0xA6 Temperature Pixel 6 Temp. at pixel position 6 in tenth of degree Celsius 2
0xA7 Temperature Pixel 7 Temp. at pixel position 7 in tenth of degree Celsius 2
0xA8 Temperature Pixel 8 Temp. at pixel position 8 in tenth of degree Celsius 2
EXAMPLE OF TEMPERATURE CALCULATION
For reading object temperature of pixel 3 send: 0xA3
Return values i.e.:
Byte(0) = 0x02
Byte(1) = 0xB0
Temperature Tobj = (256 * Byte(0) + Byte(1)) / 10 = (256 * 2 + 11) / 10 = 52,3°C
OUT OF TEMPERATURE RANGE INDICATION
Com Description Reply Bytes
0xA0 Sensor Temperature < 0°C 0x8001 2
0xA0 Sensor Temperature > 85°C 0x8002 2
0xA1 – 0xA8 Pixel Temperature < -20°C 0x8003 2
0xA1 – 0xA8 Pixel Temperature > +120°C 0x8004 2
ORDER INFORMATION
Please order this product using following:
Part Number Part Description
G-TPMO-014 TSEV0108L39
TSEV0108L39 Thermopile Sensor Module
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EMC
Due to the use of these modules for OEM application no CE declaration is done.
Especially line coupled disturbances like surge, burst, HF etc. cannot be removed by the
module due to the small board area and low price feature. There is no protection circuit
against reverse polarity or over voltage implemented.
The module will be designed using capacitors for blocking and ground plane areas in order
to prevent wireless coupled disturbances as good as possible.
DEFINITIONS AND DISCLAIMERS
Application information – Applications that are described herein for any of these products are for
illustrative purpose only. MEAS Deutschland GmbH makes no representation or warranty that such
applications will be suitable for the specified use without further testing or modification.
Life support applications – These products are not designed for use in life support appliances,
devices, or systems where malfunctions of these products can reasonably be expected to result in
personal injury.
MEAS Deutschland GmbH customers using or selling this product for use in such applications do
so at their own risk and agree to fully indemnify MEAS Deutschland GmbH for any damages
resulting from such improper use or sale.
TECHNICAL CONTACT INFORMATION
NORTH AMERICA EUROPE ASIA
Measurement Specialties, Inc.
1000 Lucas Way
Hampton, VA 23666
United States
Phone: +1-800-745-8008
Fax: +1-757-766-4297
Email: sales@meas-spec.com
Web: www.meas-spec.com
MEAS Deutschland GmbH
Hauert 13
D-44227 Dortmund
Germany
Phone: +49-(0)231-9740-0
Fax: +49-(0)231-9740-20
Email: info.de@meas-spec.com
Web: www.meas-spec.com
Measurement Specialties China Ltd.
No. 26, Langshan Road
High-tech Park (North)
Nanshan District, Shenzhen 518057
China
Phone: +86-755-33305088
Fax: +86-755-33305099
Email: info.cn@meas-spec.com
Web: www.meas-spec.com
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for
inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the
manufacturer. Measurement Specialties, Inc. reserves the right to make changes without further notice to any product herein. Measurement
Specialties, Inc. makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does
Measurement Specialties, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims
any and all liability, including without limitation consequential or incidental damages. Typical parameters can and do vary in different
applications. All operating parameters must be validated for each customer application by customer’s technical experts. Measurement
Specialties, Inc. does not convey any license under its patent rights nor the rights of others.
