A four-channel silicon-based thermopile in a TO-5 package. Each small active area is 1.2mm x 1.2mm . Time constant of 25ms with Nitrogen encapsulation gas. Delivers a very low Temperature Coefficient of Responsivity of -0.04%/°C. This detector has a very short thermal shock response to ambient temperature change.
Excellent for gas analysis, position sensor, and horizon sensor.
Low cost with high output.
ST120 Quad Detector circuit overlay
For more detailed information see the datasheet:
| Parameter | Min | Typical | Max | Symbol | Units | Comments |
|---|---|---|---|---|---|---|
| Active Area size | 1.2 x 1.2 | AA | mm | Hot junction size, per element. | ||
| Element Area | 1.44 | A | mm2 | |||
| Number of Junctions | 80 | Per element. | ||||
| Number of Channels | 4 | Per detector package. | ||||
| Output Voltage | 140 | Vs | μV | DC, H=330μW/cm2 (3) | ||
| Signal-to-Noise Ratio | 3,649 | SNR | √Hz | DC, SNR=Vs/Vn | ||
| Responsivity | 29.5 |  |
V/W | DC, =Vs/HA (2) |
||
| Resistance | 90 | R | kΩ | Detector element | ||
| Temperature Coefficient of |
-.04 | %/°C | Best linear fit, 0° to 85°C (1) | |||
| Temperature Coefficient of R | .02 | %/°C | Best fit, 0° to 85°C (1) | |||
| Noise Voltage | 38.4 | Vn | nV/√Hz | Vn2=4kTR | ||
| Noise Equivalent Power | 1.30 | NEP | nW/√Hz | DC, NEP= VnHA/Vs (2) | ||
| Detectivity | 0.92 | D* | 108√Hz/W | DC, D*=Vs/ VnH√A (2) | ||
| Time Constant | 25 | Τ | ms | Chopped, -3dB point (1) | ||
| Field of View | 9°/63° | FOV | Degrees | See Assembly Drawings for FOV Description. | ||
| Package Type | TO-5 | Standard package hole size: Ø.150″ | ||||
| Element Matching | 25 | M | % | M=|VA-VB|/VB (2) | ||
| Element Separation | 2.08 | mm | Center to Center | |||
| Operating Temperature | -50 | 125 | 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.