Cognex Corporation
Cognex Corporation is the world’s leading provider of vision systems, vision software, visi……...
3M Thin Film-Based Single Element Thermopile Detector
Dexter’s 3M thin film-based single element thermopile detector provides the highest output among all in the series. It has a high signal-to-noise ratio with a larger TO-8 package.
Benefits
The key benefits of the 3M thin film-based single element thermopile include:
High signal-to-noise ratio
Larger TO-8 package
High output
Applications
The 3M thin film-based single element thermopile can be used in the following application:
Gas analysis
Laser power measurement
Technical Specifications
The technical specifications of the 3M thin film-based single element thermopile are summarized in the following table:
| 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 | ℜ | V/W | DC, ℜ=Vs/HA (2) |
| Resistance | 15 | 18 | 30 | R | kΩ | Detector element |
| Temperature Coefficient of ℜ | -.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 | Vn 2=4kTR |
| Noise Equivalent Power | .93 | 1.16 | 1.64 | NEP | nW/√Hz | DC, NEP= Vn HA/Vs (2) |
| Detectivity | 1.8 | 2.6 | 3.2 | D* | 108cm√Hz/W | DC, D*=Vs/ Vn H√A (2) |
| Time Constant | 100 | ℑ | 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: Φ.250” | ||||
| 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.
General Specifications
The general specifications of the 3M thin film-based single element thermopile are listed below:
Flat spectral response from 100nm to > 100μm
Linear signal output from 10-6 to 0.1W/cm2
Maximum incident radiance is 0.1W/cm2
Damage threshold is ≥ 0.5W/cm2
Notes
Specifications apply at 23°C with KBr window and nitrogen encapsulating gas
Parameter is not 100% tested. 90% of all units meet these specifications
A is detector area in cm2
Test conditions: 500K blackbody source; detector active surface 10cm from 0.6513cm diameter blackbody aperture
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