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1M

Thin-Film Based Thermopile Detector

Features: A thin film-based thermopile with a 1.0mm diameter active area with good signal-to-noise ratio in a TO-5 package and a moderate time constant of 32ms with Argon encapsulation gas.

Applications: Excellent for non-contact temperature measurement.

Benefit: Small active area with good signal-to-noise ratio.

Options:

  1. See Standard Windows and Filters (PDF) for list of optical filter options.
  2. Internal aperture precisely defines active area for applications with FOV and/or spot size requirements. See Aperture Options (PDF) for available sizes.
  3. See Thermopile Configuration Table for more options.

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

1M Thermopile detector circuit overlay

1M Detector circuit overlay
(click image to see larger image)

1M Thermopile Detector

1M 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

Ø1mm Dia.

AA

mm

Hot junction size, per element.

Element Area

.785

A

mm2

  

Number of Junctions

15

 

 

Per element.

Number of Channels

1

 

 

Per detector package.

Output Voltage

50

60

80

Vs

μV

DC,  H=330μW/cm2 (3)

Signal-to-Noise Ratio

6,173

8,571

14,035

SNR

√Hz

DC, SNR=Vs/Vn

Responsivity

19.3

23.2

30.9

V/W

DC, Responsivity=Vs/HA  (2)

Resistance

2.0

3.0

4.0

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

5.7

7.0

8.1

Vn

nV/√Hz

Vn2=4kTR

Noise Equivalent Power

.19

.30

.42

NEP

nW/√Hz

DC,  NEP= VnHA/Vs (2)

Detectivity

2.1

2.9

4.8

D*

108√Hz/W

DC,  D*=Vs/ VnH√A  (2)

Time Constant

 

32

 

Τ

ms

Chopped, -3dB point (1)

Field of View

56°/85°

FOV

Degrees

See Assembly Drawings for FOV Description.

Package Type

TO-5

    

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.