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2M

Thin-Film Based Thermopile Detector

Features: A thin film-based single element thermopile detector that offers the world’s highest sensitivity in a TO-5 package. Dare to compare. Low noise voltage of 12.8nV/√Hz.

Applications: Excellent for gas analysis, fire detection and non-contact temperature measurement.

Benefit: Extremely high output with best signal-to-noise performance with a time constant of 85ms when encapsulated with Argon gas.

Options:

  1. See Standard Windows and Filters (PDF) for list of optical filter options.
  2. Order this unit encapsulated with Xenon and this becomes a super-high output detector with very low noise.
  3. See Thermopile Configuration Table for more options.

Datasheet: For more detailed information see the datasheet (PDF).

2M Thermopile detector circuit overlay

2M Detector circuit overlay
(click image to see larger image)

2M Thermopile Detector

2M Thermopile Detector

2M Thermopile Detector Technical Specifications

Specifications apply at 23°C with KBr Window and Argon encapsulating gas

Parameter
Min
Typical
Max
Symbol
Units
Comments

Active Area size

2 x 2

AA

mm

Hot junction size, per element.

Element Area

4

A

mm2

  

Number of Junctions

48

 

 

Per element.

Number of Channels

1

 

 

Per detector package.

Output Voltage

200

250

300

Vs

μV

DC,  H=330μW/cm2 (3)

Signal-to-Noise Ratio

12,739

19,531

30,303

SNR

√Hz

DC, SNR=Vs/Vn

Responsivity

15.2

18.9

22.7

V/W

DC, =Vs/HA  (2)

Resistance

5

10

15

R

kΩ

Detector element

Temperature Coefficient of

 

-.36

 

 

%/°C

Best linear fit, 0° to 85°C (1)

Temperature Coefficient of  R

 

-.2

 

 

%/°C

Best fit, 0° to 85°C (1)

Noise Voltage

9.9

12.8

15.7

Vn

nV/√Hz

Vn2=4kTR

Noise Equivalent Power

.44

.68

1.03

NEP

nW/√Hz

DC,  NEP= VnHA/Vs (2)

Detectivity

1.9

3.0

4.6

D*

108√Hz/W

DC,  D*=Vs/ VnH√A  (2)

Time Constant

 

85

 

Τ

ms

Chopped, -3dB point (1)

Field of View

38°/95°

FOV

Degrees

See Assembly Drawings for FOV Description.

Package Type

TO-5

    

Standard package hole size:Ø.150"

Operating Temperature

-50

 

100

Ta

°C

  

General Specifications: 
Flat spectral response from 100nm to > 100µm.  Linear signal output from 10-6 to 0.1W/cm2. 
Maximum incident radiance 0.1W/cm2 , damage threshold ≥ .5W/cm2

Notes:      
(1) Parameter is not 100% tested. 90% of all units meet these specifications.
(2) A is detector area in cm2.
(3)Test Conditions: 500K Blackbody source; Detector active surface 10cm from 0.6513cm Diameter Blackbody Aperture.