ST60 Dual

Features

A two-channel silicon-based thermopile detector in a TO-5 package. Each small active area size is 0.61mm x 0.61mm. This is our lowest-cost and fastest time constant two-channel detector. It delivers a time constant of 18ms with Nitrogen encapsulation gas combined with a very low Temperature Coefficient of Responsivity of -0.04%/°C. This detector has a very short thermal shock response to ambient temperature change.

Applications

Gas analysis in handheld gas monitors for automotive exhaust, industrial/environmental leak detection and air quality monitoring.

Benefit

Low cost and small active area size with medium output.

Options

See Standard Windows and Filters (PDF) for list of optical filter options.
See Thermopile Configuration Table for more options.
Internal 30kΩ 5% NTC chip thermistor provides ambient package temperature measurement. See DC-4005 section of Thermistor Options (PDF).
ST60R Dual version offers a low-cost (20% tolerance) poly-silicon resistor to be used as a PTC thermistor.

ST60 Dual Detector circuit overlay
ST60 Dual Thermopile Detector

Datasheet

For more detailed information see the datasheet:

ST60 Dual 277.70 KB

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Parameter	Min	Typical	Max	Symbol	Units	Comments
Active Area size		.61 x .61		AA	mm	Hot junction size, per element.
Element Area		.37		A	mm²
Number of Junctions		80				Per element.
Number of Channels		2				Per detector package.
Output Voltage	50	62	74	V_s	μV	DC, H=330μW/cm² (3)
Signal-to-Noise Ratio	1,381	1,981	2,891	SNR	√Hz	DC, SNR=V_s/V_n
Responsivity	40.7	50.5	60.3		V/W	DC, =V_s/HA (2)
Resistance	40	60	80	R	kΩ	Detector element
Temperature Coefficient of		-.04			%/°C	Best linear fit, 0° to 85°C (1)
Temperature Coefficient of R		.11			%/°C	Best fit, 0° to 85°C (1)
Noise Voltage	25.6	31.3	36.2	V_n	nV/√Hz	V_n²=4kTR
Noise Equivalent Power	.42	.62	.89	NEP	nW/√Hz	DC, NEP= V_nHA/V_s (2)
Detectivity	.69	.98	1.44	D*	10⁸√Hz/W	DC, D*=V_s/ V_nH√A (2)
Time Constant		18		Τ	ms	Chopped, -3dB point (1)
Field of View		15°/47°		FOV	Degrees	See Assembly Drawings for FOV Description.
Package Type		TO-5				Standard package hole size: (2) .046″ X 046 ” sq. holes
Element Matching		5	10	M	%	M=\|V_A-V_B\|/V_B (2)
Element Separation		2.08			mm	Center to Center
Operating Temperature	-50		100	T_a	°C
ST60R Thermistor Options	~24	30	~36	R_T	kΩ	PTC Poly-Silicon resistor on detector die.
ST60R Thermistor Temperature Coefficient of R	.107	.11	.113		%/°C	ΔR/(RΔT), Best fit, 0° to 85°C (1)

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.