1 ch SPAD module (for VIS to NIR region) The C16531-100GD 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 φ100 μm and such a small photosensitive area offers a low dark count. These modules operate by simply connecting to an external power supply (±5 V). Features Single photon counting is possible High sensitivity in the long wavelength range Low dark count Low afterpulse Click here to view a full product spec sheet PDF Product Specifications Device types Free Space SPAD Detector series VIS to NIR SPAD Spectral response range 400 to 1000 nm Peak wavelength (typ.) 630 nm Photon detection efficiency (typ.) 65% Effective photosensitive area 100 μm dia. Package Enclosed module Cooling TE-cooled Element temperature (set temperature) -20 ℃ Output Type Digital TTL Compatible Dark signal (typ.) 150 cps Maximum count rate (typ.) 7 Mcps Recommended voltage (typ.) +/- 5 V Measurement condition Ta=25 ℃ Additional information: Technical note for MPPC