Called S16835, there are two models, which the company describes as “available in two different photosensitivity areas: 54µm and 100µm” [SIC]. Electronics Weekly has asked if these are actually areas or diameters.
In standard operating conditions (25°C ambient, -20°C SPAD) typical dark currents are 15 or 60 count/s respectively (50 or 200 count/s max).
Terminal capacitance and gain are 2.8pF and 6×106, or 3.2pF and 1.5×107, again respectively.
Photo detection efficiency including after-pulses is 67% in both cases and the sensitive spectrum is 400 to 1,000nm (visible and near-infrared) peaking at 610nm.
“These features make them ideal for a variety of applications such as low-light-level measurement, particle diameter measurement, fluorescence measurement, and analytical instruments,” according to the company.
The packages are 14mm diameter metal cans with a borosilicate glass window,
Inside are the SPAD, a two-stage thermoelectric cooler and a thermistor.
SPAD breakdown voltage is 40V±5V, and recommended drive is at 7V over the breakdown voltage – at which the temperature coefficient is typically 45mV/°C.
Maximums for the cooler drive are 1A and 900mV – the current-voltage characteristic is near-linear up to these values.
Typically is will take ~430mA to get the SPAD to -20°C with +25°C ambient and a 3°C/W heatsink, at which thermistor resistance is typically 60kΩ – max allowable thermistor dissipation is 200μW.
Find the 100μm S16835 SPAD on this web page
