C−Series SiPM Sensors

www.onsemi.com

6

CIRCUIT SCHEMATICS

An SiPM is formed of a large number (hundreds or

thousands) of microcells. Each microcell is an avalanche

photodiode with its own quench resistor and a capacitively

coupled fast output. These microcells are arranged in

a close-packed array with all of the like terminals (e.g. all of

the anodes) summed together. The array of microcells can

thus be considered as a single photodiode sensor with three

terminals: anode, cathode and fast output.

Figure 2. Circuit Schematic

only a 12 microcell example. Typically, SiPM sensors have

hundreds or thousands of microcells.

Circuit schematic of the SensL SiPM microcell,

showing details of the Fast Output.

SensL SiPM component symbol.