+1 (734) 426-3921
Questions about Dexter detectors? Call today. Outside the U.S., contact the representative nearest you.

TM34

TM34 Detector circuit overlay
TM34 Detector circuit overlay

Thin Film Based Thermopile Detector

Features:
A three-channel thin-film thermopile in a TO-8 package. Each symmetrically positioned active area is 3.16mm x 0.4mm. Offers low noise output and internal aperture minimizing channel-to-channel crosstalk while increasing sensitivity.
Applications:
Gas analysis for automotive, environmental air quality, industrial sensors and medical monitoring.
Benefit:
Low noise and 3-channels in a TO-8 package with moderate output.
Options:
  1. See Standard Windows and Filters (PDF) for list of optical filter options.
  2. Internal 30kΩ 5% NTC chip thermistor provides ambient package temperature measurement. See DC-4005 section of Thermistor Options (PDF).
  3. See Thermopile Configuration Table for more options.
Datasheet:
For more detailed information see the datasheet
TM34 (PDF)
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

 

 

Per detector package.

Output Voltage

90

115

130

Vs

μV

DC,  H=330μW/cm2 (3)

Signal-to-Noise Ratio

6,429

10,088

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-8 with 3 Pins

   

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.