M34

Features:A thin-film thermopile in a TO-5 package with an active area of 3.16mm x 0.4mm that offers low noise output.

Applications: Non-contact temperature measurement for industrial and medical, including infant incubators.

Benefit: Centered rectangular active area and low noise with moderate output.

Options:

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

M34 Detector circuit overlay
(click image to see larger image)

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					Per detector package.
Output Voltage	90	115	130	V_s	μV	DC, H=330μW/cm² (3)
Signal-to-Noise Ratio	6,429	10,088	16,049	SNR	√Hz	DC, SNR=V_s/V_n
Responsivity	21.6	27.6	31.2		V/W	DC, =V_s/HA (2)
Resistance	4.0	8.0	12.0	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	8.1	11.4	14.0	V_n	nV/√Hz	V_n²=4kTR
Noise Equivalent Power	.26	.42	.65	NEP	nW/√Hz	DC, NEP= V_nHA/V_s (2)
Detectivity	1.7	2.7	4.3	D*	10⁸√Hz/W	DC, D*=V_s/ V_nH√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 3 Pins					Standard package hole size:Ø.150"
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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