THORLABS SPCM A Series, Operation Manual

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6 Appendix
© 2019 Thorlabs
51
6.4 Technical Data
SPCM20A SPCM20A/M SPCM50A SPCM50A/M
Detector Type
Si APD
Electrical Data
Wavelength Range 350 - 900 nm
Active Detector Diameter 20 µm 50 µm
Typical Max Responsivity 35 % @ 500 nm
Dark Count Rate 60 Hz max
(25 Hz Typ)
200 Hz max
(150 Hz Typ)
Max. Count rate
1
)
28 MHz 22 MHz
Dead Time (Typical) 35 ns 45 ns
APD Gating Delay
2
)
typ. 18 ns
Gate/Trigger In to Pulse Out Delay
3
)
typ. 28 ns
Afterpulsing probability 3%
APD Temperature Set Point (0 ± 1) °C
APD Temperature Stability better 0.1 K
Gating / Trigger Input TTL 50 Ω
Pulse Output TTL 50 Ω
General
Power Supply 6 VDC / 1.5 A
Operating Temperature Range
4
)
0 - 40 °C
Storage Temperature Range -40 to 70 °C
Dimensions (W x H x D), overall 76.5 x 85 x 36.2 mm
Mounting thread 8-32 M4 8-32 M4
1
) pulsed light
2
) In External Gating mode; delay between trigger signal (at Gate / Trigger In) and activating the APD gating
3
) In External Gating mode; delay between trigger signal (at Gate / Trigger In) and enabling Pulse Out
4
) non-condensing
All technical data are valid at 23 ± 5°C and 45 ± 15% rel. humidity (non condensing), after 10 min. warm-up time