Datasheet TP337A Datasheet (OPTO TECH CORPORATION)

THERMOPILE

Part No : 80-02-00013

▓

Features

Type : TP337A

The thermopile sensor consists of a series of 116 thermoelements, forming a sensitive region
size of 545μm (diameter). The sensor is hermetically sealed into a TO-5 metal housing, with an
optical filter. This standard filter allows measurements to be made in the spectral range above 5
m wavelength. The thermosensor exhibits an almost white noise, comparable to an ohmic
resistance. It has a constant signal versus frequency up to its frequency limit, and is directly
proportional to incident radiation. The thermopile sensors are featured with an additional
temperature reference resistor on the same chip. The standard version of temperature reference
resistor is housing connected to ground.

▓

Applications

* Ear thermometers; clinic thermometers

* Infrared thermometers

* Consumer applications: hair dryer, micro-wave oven, air conditioner, refrigerator

μ

* Continuous temperature control of manufacturing

* Security system

* Radiation monitor switch system

* Absorbing measurement for gas analysis

* Thermoelectric converter

* Heat flux flowmeter

OPTO TECH

Since 1983

Microelectronics Business Division 2003.01 1 / 7

OPTO TECH CORPORATION

Tel: [phone]
Fax: [phone]
http://www.opto.com.tw

THERMOPILE

Part No : 80-02-00013

▓

Electrical Characteristics

Type : TP337A

Parameter Condition Min. Typ. Max. Unit

Thermopile

Number of thermojunctions --- 116 ---

Chip size --- 1740*1740 ---

Active region size

Thickness of substrate

Resistance of thermopile 25℃ 50 65 80 KΩ

Sensitivity

Interference
layer

Silicon-substrat
e

With 5-14μm
filter

---

600 625 650 μm

70 85 100 V/W

Diameter

545

---

μ

μ

m2

m

Detecctivity 1.0*10

Time constant --- 16 --- ms

Noise voltage 28 32 36 nV/Hz

NEP 0.28 0.36 0.48 nW/Hz

Temperature range Operation -20 --- 100

T emperature refe rence resistor

Resistance (1) 25℃ 29.1 30.0 30.9 KΩ

β

value (1) 0

---

o

C/50℃ 3773 3811 3849 K

8

1.3*108 1.7*108 cm*Hz

℃

1/2

/W

1/2

1/2

Measured at 1 Hz chopper frequency, within spectral range 5-14μm, using a blackbody radiator of
500K temperature.

Note : Thermistor should be operated under 1mA.

OPTO TECH

Since 1983

Microelectronics Business Division 2003.01 2 / 7

OPTO TECH CORPORATION

Tel: [phone]
Fax: [phone]
http://www.opto.com.tw

THERMOPILE

Part No : 80-02-00013

▓

Thermopile volt age vs. blackbody temperature

Type : TP337A

▓

Frequency response

OPTO TECH

Since 1983

Microelectronics Business Division 2003.01 3 / 7

OPTO TECH CORPORATION

Tel: [phone]
Fax: [phone]
http://www.opto.com.tw

THERMOPILE

Part No : 80-02-00013

▓

Field of view

1) window size: 2.57mm (diameter)

Type : TP337A

337A

▓

Thermistor vs. temperature

The resistance of the temperature reference resistor varies with temperature and the behaviour is
illustrated in the following figure.

OPTO TECH

Since 1983

Microelectronics Business Division 2003.01 4 / 7

OPTO TECH CORPORATION

Tel: [phone]
Fax: [phone]
http://www.opto.com.tw

THERMOPILE

p

Part No : 80-02-00013

Type : TP337A





1

−





β

T1T

25



At temperature 25℃, R(T)=R25e



describes the resistance vs. temperature, where R25 is
the resistance at ambient temperature 25℃ and T, T25 are the ambient temperatures in unit of kelvin
degrees.

▓

Pin assignment & description

2 thermistor pin

4 thermistor pin (GND)

1 thermopile output pin (+)

3 thermopile output pin (-)

Thermistor

Thermo

ile

2(R)

3(V-)

1(V+)

4(GND)

BACKSIDE VIEW

OPTO TECH

Since 1983

Microelectronics Business Division 2003.01 5 / 7

SIDE VIEW

OPTO TECH CORPORATION

Tel: [phone]
Fax: [phone]
http://www.opto.com.tw

THERMOPILE

Part No : 80-02-00013

▓

Transmission of filter

Transmission of optical filter is measured by FTIR from 2μm

Type : TP337A

▓

Package

The sensor is hermetically sealed into a TO-5 metal housing, with an optical filter. This standard
filter allows measurements to be made in the spectral range above 5μm wavelength. The
dimensions of header and cap are shown below.

OPTO TECH

Since 1983

Microelectronics Business Division 2003.01 6 / 7

OPTO TECH CORPORATION

Tel: [phone]
Fax: [phone]
http://www.opto.com.tw

THERMOPILE

Part No : 80-02-00013

TP337A

ψ9.05 +/- 0.1

ψ8.15

ψ5.4
ψ2.5

Window

IR

filter

1.66

Type : TP337A

filter

Unit: mm

CHIP

1.74

4.2+/- 0.1

0.43

OPTO TECH

Since 1983

Microelectronics Business Division 2003.01 7 / 7

OPTO TECH CORPORATION

Tel: [phone]
Fax: [phone]
http://www.opto.com.tw