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3M

3M Detector circuit overlay
3M Detector circuit overlay
3M Thermopile Detector
3M Thermopile Detector

Thin Film Based Thermopile Detector

Features:
A thin film-based single element thermopile. The highest output detector in our line-up.
Applications:
Excellent for laser power measurement and can be used for gas analysis.
Benefit:
Highest signal-to-noise ratio with larger TO-8 package and higher cost.
Options:
  1. See Standard Windows and Filters (PDF) for list of optical filter options.
  2. See Thermopile Configuration Table for more options.
Datasheet:
For more detailed information see the datasheet
3M (PDF)

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

Parameter
Min
Typical
Max
Symbol
Units
Comments

Active Area size

3 x 3

AA

mm

Hot junction size, per element.

Element Area

9

A

mm2

  

Number of Junctions

72

 

 

Per element.

Number of Channels

1

 

 

Per detector package.

Output Voltage

400

440

500

Vs

μV

DC,  H=330μW/cm2 (3)

Signal-to-Noise Ratio

18,100

25,581

31,847

SNR

√Hz

DC, SNR=Vs/Vn

Responsivity

13.5

14.8

16.8

V/W

DC, =Vs/HA  (2)

Resistance

15

18

30

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

15.7

17.2

22.1

Vn

nV/√Hz

Vn2=4kTR

Noise Equivalent Power

.93

1.16

1.64

NEP

nW/√Hz

DC,  NEP= VnHA/Vs (2)

Detectivity

1.8

2.6

3.2

D*

108√Hz/W

DC,  D*=Vs/ VnH√A  (2)

Time Constant

 

100

 

Τ

ms

Chopped, -3dB point (1)

Field of View

63°/120°

FOV

Degrees

See Assembly Drawings for FOV Description.

Package Type

TO-8

    

Standard package hole size:Ø.080

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.