link to page 2 link to page 2 link to page 2 link to page 2 link to page 3 link to page 3 link to page 2 RTD120D Datasheet1. Specifications Specifications apply at 23C with KBr Window and Nitrogen encapsulating gas. SymbolParameterMin.Typ.Max.UnitComments[1] AA Active Area size 1.2 × 1.2 mm Hot junction size, per element. A Element Area 1.44 mm2 Number of Junctions 80 Per element. Number of Channels 2 Per detector package. Vs Output Voltage 133 161 189 µV DC, H = 330µW/cm2 [2] SNR Signal-to-Noise Ratio 3,067 4,197 5,225 √Hz DC, SNR = Vs/Vn R Responsivity 28.0 33.9 39.8 V/W DC, R = Vs/HA [3] R Resistance 80 90 115 kΩ Detector element Temperature Coef icient of R -0.04 %/°C Best linear fit, 0° to 85°C [4] Temperature Coef icient of R 0.02 %/°C Best fit, 0° to 85°C [4] V 2 n Noise Voltage 36.2 38.4 43.4 nV/√Hz Vn = 4kTR NEP Noise Equivalent Power 0.91 1.13 1.55 nW/√Hz DC, NEP = Vn HA/Vs [3] D* Detectivity 0.77 1.06 1.32 108cm√Hz/Ω DC, D* = Vs/ Vn H√A [3] T Time Constant 25 ms Chopped, -3dB point [4] FOV Field of View 8°/60° Degrees For FOV description, see Package Outline Drawings Package Type TO-5 Standard package hole size: 0.060” × 0.060” M Element Matching 25 % M = |VA-VB|/VB [3] Element Separation 3.30 mm Center to center Ta Operating Temperature -50 +125 °C Reference Filter, Central 3.920 µm Element A Wave Length CO2 Filter, Central Wave 4.260 µm Element B Length 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. 2. Test conditions: 500K Blackbody source; Detector active surface 10cm from 0.6513cm diameter Blackbody Aperture. 3. A is detector area in mm2. 4. Parameter is not 100% tested. 90% of al units meet these specifications. R36DS0013EU0100 Rev.1.00 Page 2 Aug 31, 2021 Document Outline Image Diagram Detector Circuit Overlay Applications Features Benefits 1. Specifications 2. Package Outline Drawings 3. Ordering Information 4. Revision History