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ST60 Quad

Silicon Based Thermopile Detector

Features: A four-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 four-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 and laser targeting.

Benefit: Low cost in TO-5 package with small active area size with medium output.

Options:

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

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

ST60 Quad Thermopile Detector circuit overlay

ST60 Quad Detector circuit overlay
(click image to see larger image)

ST60 Quad Thermopile Detector

ST60 Quad Thermopile Detector

ST60 Quad Technical Specifications

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

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

4

 

 

Per detector package.

Output Voltage

50

62

74

Vs

μV

DC,  H=330μW/cm2 (3)

Signal-to-Noise Ratio

1,381

1,981

2,044

SNR

√Hz

DC, SNR=Vs/Vn

Responsivity

40.7

50.5

60.3

V/W

DC, =Vs/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

Vn

nV/√Hz

Vn2=4kTR

Noise Equivalent Power

.42

.62

.89

NEP

nW/√Hz

DC,  NEP= VnHA/Vs (2)

Detectivity

.69

.98

1.44

D*

108√Hz/W

DC,  D*=Vs/ VnH√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:(4) .046" X .046" sq. holes

Element Matching

10

15

25

M

%

M=|VA-VB|/VB (2)

Element Separation

 

2.08

 

 

mm

Center to Center

Operating Temperature

-50

 

100

Ta

°C

  

ST60R Thermistor Options

~24

30

~36

RT

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.