SPAD modules C16531 series 1 ch SPAD module (for VIS to NIR region) The C16531 series is a photon counting module that can detect low-level light. These modules consist of a thermoelectric cooled single photon avalanche diode (SPAD), an amplifier, a comparator, a SPAD bias circuit, and a temperature controller. The photosensitive area is available in two sizes of ϕ50 μm and ϕ100 μm, and such small photosensitive areas offer a low dark count. These modules operate by simply connecting to an external power supply (±5 V). Single photon counting is possible. Low-light-level measurement High sensitivity in the long wavelength range Particle diameter measurement Fluorescence measurement Analytical instrument Structure Parameter Built-in photosensor Effective photoseinsitive area Absolute maximum ratings Parameter Supply voltage Operating temperature Storage temperature Symbol Vs Topr Tstg *1: When there is a temperature difference between a product and the surrounding area in high humidity environments, dew condensation may occur on the product surface. Dew condensation on the product may cause deterioration in characteristics and reliability. Note: xceeding the absolute maximum ratings even momentarily may cause a drop in product quality. Always be sure to use the E product within the absolute maximum ratings. Electrical and optical characteristics (Ta=25 °C, λ=630 nm, Vs=±5 V, unless otherwise noted) Parameter Spectral response range Peak sensitivity wavelength Chip temperature (setting temperature)*2 *3 Photon detection efficiency Dark count Afterpulse probability Comparator output Maximum count rate Positive power supply Current consumption Negative power supply *2: When the chip temperature strays from the setting temperature by 5 °C, cooling automatically stops, and signals are no longer output. *3: The setting temperature cannot be changed.

Block diagram SPAD modules Recommended operating conditions Supply voltage*4 Parameter Positive power supply Negative power supply *4: A power supply with 1.5 A or higher output must be used. Block diagram SPAD bias circuit TE-cooled type SPAD Temperature controller Amplifier Digital output Connection example Connection example Using the supplied power cable, connect the SPAD module to a power supply. You can count output pulses by connecting the SPAD module to a frequency counter. Frequency counter Digital signal cable Light source Power cable (accessory) KACCC1167EA Photons SPAD module C16531...

SPAD modules Measurement example Comparator output hoton detection efficiency vs. wavelength GND Photon detection efficiency vs. wavelength (Typ. Ta=25 °C) Number of detected photons (cps) Photon detection efficiency (%) Linearity (typical example) C16531-050GD Number of incident photons (cps) KACCB0685EA

SPAD modules Dimensional outline (unit: mm) Dimensional outline (unit: mm) Photosensitive area Power connector S5B-PH-K-S (J.S.T.MFG.) Light input window 9.5 Digital output connector (SMB connector) Tolerance unless otherwise noted: ±0.5 Weight: 230 g 40 ∙ Power cable ∙ Instruction manual

SPAD modules Options (sold separately) Coaxial converter adapter A10613 series The A10613 series is a coaxial adapter that converts the SMB coaxial connector for signal-output on the photon counting module to a BNC or SMA coaxial connector. This adapter allows connecting a BNC or SMA cable to the photon counting module. Precautions ∙ For cleaning the product, wipe using a clean, soft, dry cloth. Do not use organic solvents such as thinner and acetone. ∙ Do not cover the unit with a dark cloth or something similar while the product is running. Covering the product can cause the internal temperature...