ST60 With Diffractive Lens

ST60 TO-5 Detector circuit overlay

ST60 TO-5 Detector circuit overlay

ST60 TO-5 Thermopile Detector

ST60 TO-5 Thermopile Detector

A single-channel silicon-based thermopile with integrated diffractive lens and internal baffle that provides lowest cost solutions in a small active area of 0.61mm x 0.61mm in a TO-5 package. Time constant of 18ms with Nitrogen encapsulation gas and a 9° FOV. 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 9° FOV non-contact temperature.

Low cost, narrow FOV, and small active area size with medium output.


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

For more detailed information see the datasheet ST60 Diffractive Lens (PDF).

Specifications apply at 23°C with AR coated Diffractive Lens (P/N: DC-6132) 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   1       Per detector package.
Output Voltage 240 295 350 Vs μV DC,  H=330μW/cm2 (3)
Signal-to-Noise Ratio 6,630 9,425 13,672 SNR √Hz DC, SNR=Vs/Vn
Responsivity 195.5 240.2 285.0 V/W DC, =Vs/HA  (2)
Resistance 40 60 80 R 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 .09 .13 .19 NEP nW/√Hz DC,  NEP= VnHA/Vs (2)
Detectivity 3.30 4.68 6.80 D* 108√Hz/W DC,  D*=Vs/ VnH√A  (2)
Time Constant   18   Τ ms Chopped, -3dB point (1)
Field of View     FOV Degrees See Assembly Drawings for FOV Description.
Package Type   TO-5 with Lens       Standard package hole size: Ø.150"
Operating Temperature -50   100 Ta °C  
ST60R Thermistor Options ~24 30 ~36 RT 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
(1) 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.

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