High-speed photodiodes (S5973 series: 1 GHz) The S5971, S5972 and S5973 series are high-speed Si PIN photodiodes designed for visible to near infrared light detection. These photodiodes provide wideband characteristics at a low bias, making them suitable for optical communications and other high-speed photometry. The S5973 series includes a mini-lens type (S5973-01) that can be efficiently coupled to an optical fiber and a violet sensitivity enhanced type (S5973-02) ideal for violet laser detection. High-speed response S5971 : 100 MHz (VR=10 V) S5972 : 500 MHz (VR=10 V) S5973 series: 1 GHz (VR=3.3 V) Optical fiber communications High-speed photometry Violet laser detection (S5973-02) Low price High sensitivity S5973-02: 0.3 A/W, QE=91 % (λ=410 nm) High reliability Structure / Absolute maximum ratings Type no. S5971 S5972 S5973 S5973-01 S5973-02 Dimensional outline/ Window material*1 ①/K Photosensitive area size Effective photosensitive area Absolute maximum ratings Power Operating Storage dissipation temperature temperature P Topr Tstg (mW) (°C) (°C) Note: Exceeding the absolute maximum ratings even momentarily may cause a drop in product quality. Always be sure to use the product within the absolute maximum ratings. Electrical and optical characteristics Spectral Peak response sensitivity range wavelength λ λp λp Short circuit current Isc 100 lx (µA) 1.0 0.42 0.09 0.42 0.07 Noise Temp. Terminal coefficient Cutoff capacitance equivalent power frequency NEP of Ct VR=10 V fc ID f=1 MHz ΔTID λ=λp (times/°C) Window material K: borosilicate glass, L: lens type borosilicate glass λ=410 nm VR=10 V VR=3.3 V

Photo sensitivity temperature characteristics Spectral response Photosensitivity temperature characteristics (Typ. Ta=25 °C) Cut-off frequency vs. reverse voltage Frequency response Cutoff frequency vs. reverse voltage Cutoff frequency

Dark current vs. reverse voltage Terminal capacitance vs. reverse voltage Terminal capacitance Dark current S5973 series S5973 series Fiber coupling characteristic (S5973-01, Z direction) 1 pF 0.1 1 100 100 fA Fiber coupling characteristic (S5973-01, X, Y direction) 10 0.1 1 Fiber coupling characteristics (S5973-01) X, Y direction (Typ. Ta=25 °C, λ=780 nm, NA=0.2) Optical fiber (core diameter: 50 µm) Y X Optical fiber (core diameter: 50 µm) Y Shift from lens center X, Y (mm) Distance between lens and fiber end Z (mm) KPINB0089EA

Dimensional outline (S5971, etc. unit: mm) Dimensional outline (S5973-01, unit: mm) Dimensional outlines (unit: mm) Photosensitive surface Photosensitive surface ional outline (S5973-02, unit: mm) Case Case Photosensitive surface

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