ST150 is a single-channel silicon-based thermopile from Dexter, delivering a low temperature coefficient of responsivity of -0.04%/°C. The low-cost detector has a high output voltage with a quick time constant of 38ms.
It is supplied in a TO-5 package. In addition, it exhibits a very short thermal shock response to changes in ambient temperature.
Benefits
The key benefits of the ST150 include:
- High output
- Low cost
- Large active area of 1.5 x 1.5mm
Options
The options available include:
- A range of optical filter options are available
- ST60R Micro version provides an economical (20% tolerance) poly-silicon resistor to be employed as a PTC thermistor
- Internal 30kΩ 5% NTC chip thermistor offers ambient package temperature measurement
- Internal aperture accurately defines active area for applications with FOV and/or spot size requirements
Applications
The ST150 is suitable for the following applications:
- Gas analysis
- Fire detection
- Non-contact temperature measurement
Technical Specifications
The technical specifications of the ST150 are summarized in the following table:
| Parameter |
Min |
Typical |
Max |
Symbol |
Units |
Comments |
| Active Area size |
1.5 x 1.5 |
AA |
mm |
Hot junction size, per element. |
| Element Area |
2.25 |
A |
mm2 |
|
| Number of Junctions |
120 |
|
|
Per element. |
| Number of Channels |
1 |
|
|
Per detector package. |
| Output Voltage |
180 |
230 |
280 |
Vs |
μV |
DC, H=330μW/cm2 (3) |
| Signal-to-Noise Ratio |
4,063 |
5,990 |
8,946 |
SNR |
√Hz |
DC, SNR=Vs/Vn |
| Responsivity |
24.2 |
31.0 |
37.7 |
ℜ |
V/W |
DC, ℜ=Vs/HA (2) |
| Resistance |
60 |
90 |
120 |
R |
kΩ |
Detector element |
| Temperature Coefficient of ℜ |
|
-.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 |
31.3 |
38.4 |
44.3 |
Vn |
nV/√Hz |
Vn 2=4kTR |
| Noise Equivalent Power |
.83 |
1.24 |
1.83 |
NEP |
nW/√Hz |
DC, NEP= Vn HA/Vs (2) |
| Detectivity |
.82 |
1.2 |
1.8 |
D* |
108cm√Hz/W |
DC, D*=Vs/ Vn H√A (2) |
| Time Constant |
|
38 |
|
ℑ |
ms |
Chopped, -3dB point (1) |
| Field of View |
42°/92° |
FOV |
Degrees |
See Assembly Drawings for FOV Description. |
| Package Type |
TO-5, |
|
|
Standard package hole size: Φ.150” |
| Operating Temperature |
-50 |
|
100 |
Ta |
°C |
Short durations to 125°C possible |
| ST150R Thermistor Option |
55 |
75 |
95 |
RT |
kΩ |
PTC Poly-Silicon resistor on detector die. |
| ST150R 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.
General Specifications
The general specifications of the ST150 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