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DR34

Thin-Film Based Thermopile Detector

Features: A two-channel or a one-channel compensated thin-film thermopile in a TO-5 package. Each active area is 3.16mm x 0.4mm and offers low noise output. Internal aperture minimizes channel-to-channel crosstalk and thus increasing sensitivity.

Applications: Gas analysis for automotive, environmental air quality including greenhouses, industrial and medical monitoring including infant incubators.

Benefit: Low noise and dual channel in a TO-5 package with moderate output.

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 (PDF).

DR34 Thermopile Detector circuit overlay

DR 34 Detector circuit overlay
(click image to see larger image)

DR34 Thermopile Detector

DR34 Thermopile Detector

DR 34 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

3.16 x .4

AA

mm

Hot junction size, per element.

Element Area

1.264

A

mm2

  

Number of Junctions

40

 

 

Per element.

Number of Channels

1 Compensated

 

 

Per detector package.

Output Voltage

90

115

130

Vs

μV

DC,  H=330μW/cm2 (3)

Signal-to-Noise Ratio

6,429

8,582

16,049

SNR

√Hz

DC, SNR=Vs/Vn

Responsivity

21.6

27.6

31.2

V/W

DC, =Vs/HA  (2)

Resistance

4.0

8.0

12

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

8.1

11.4

14.0

Vn

nV/√Hz

Vn2=4kTR

Noise Equivalent Power

.26

.42

.65

NEP

nW/√Hz

DC,  NEP= VnHA/Vs (2)

Detectivity

1.7

2.7

4.3

D*

108√Hz/W

DC,  D*=Vs/ VnH√A  (2)

Time Constant

 

38

 

Τ

ms

Chopped, -3dB point (1)

Field of View

NA

FOV

Degrees

See Assembly Drawings for FOV Description.

Package Type

TO-5 with 5 Pins

   

Standard package hole size:Ø.437

Element Matching

 

5

10

M

%

M=|VA-VB|/VB (2)

Element Separation

 

1.8

 

 

mm

Center to Center

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.