3M

Features: A thin film-based single element thermopile. The highest output detector in our line-up.

Applications: Excellent for laser power measurement and can be used for gas analysis.

Benefit: Highest signal-to-noise ratio with larger TO-8 package and higher cost.

Options:

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

3M Detector circuit overlay
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3M Thermopile Detector

Specifications apply at 23°C with KBr Window and Argon encapsulating gas

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	V_s	μV	DC, H=330μW/cm² (3)
Signal-to-Noise Ratio	18,100	25,581	31,847	SNR	√Hz	DC, SNR=V_s/V_n
Responsivity	13.5	14.8	16.8		V/W	DC, =V_s/HA (2)
Resistance	15	18	30	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	15.7	17.2	22.1	V_n	nV/√Hz	V_n²=4kTR
Noise Equivalent Power	.93	1.16	1.64	NEP	nW/√Hz	DC, NEP= V_nHA/V_s (2)
Detectivity	1.8	2.6	3.2	D*	10⁸√Hz/W	DC, D*=V_s/ V_nH√A (2)
Time Constant		100		Τ	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:Ø.080
Operating Temperature	-50		100	T_a	°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.

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