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M5

Thin-Film Based Thermopile Detector

Features: A thin film-based thermopile offering very low noise and a small 0.5mm diameter active area in a TO-5 package. This is one of the lowest noise thermopiles you can buy and provides a time constant 28ms time constant with Argon encapsulation gas.

Applications: Excellent for non-contact temperature measurement.

Benefit: Small active area with medium 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).

M5 Thermopile Detector circuit overlay

M5 Detector circuit overlay
(click image to see larger image)

M5 Thermopile Detector

M5 Thermopile Detector

M5 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

Ø.5mm Dia.

AA

mm

Hot junction size, per element.

Element Area

.196

A

mm2

  

Number of Junctions

10

 

 

Per element.

Number of Channels

1

 

 

Per detector package.

Output Voltage

22

35

45

Vs

μV

DC,  H=330μW/cm2 (3)

Signal-to-Noise Ratio

2,716

5,000

7,895

SNR

√Hz

DC, SNR=Vs/Vn

Responsivity

34.0

54.1

69.6

V/W

DC, =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

.08

.13

.24

NEP

nW/√Hz

DC,  NEP= VnHA/Vs (2)

Detectivity

1.9

3.4

5.4

D*

108√Hz/W

DC,  D*=Vs/ VnH√A  (2)

Time Constant

 

28

 

Τ

ms

Chopped, -3dB point (1)

Field of View

64°/78°

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.