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Photomultiplier tubes photon counting read out chip

  • TRL Technology Readiness Level 9 – Full system running, reliability proven
  • Detector Read-Out SiPM, MAPMT
  • Number of Channel 64
  • Signal Polarity Negative


SPACIROC 3 is a 64-channel chip reading out negative fast input current pulses such as those provided by Multi Anode Photo Multipliers for space-borne and low-power applications. SPACIROC 3 counts photon individually within a Gate Time Unit (GTU).
The 64 inputs from MA-PMT Anodes are read-out by a current amplifier followed by a discriminator. Threshold of that discriminator is set by a 10b DAC and an individual 7b DAC to compensate for the non-uniformity between detector channels. Each channel provides a 100% trigger rate for signal greater than 1/3 photoelectron. The digital part operates continuously and handles data conversion of each Photon Counting channel. The digital data are transmitted through a dedicated parallel communication links within the defined Gate Time Unit (GTU). The ASIC data output rate is 40 MHz. Spaciroc is radiation tolerant and its power consumption is lower than 1 mW/channel.


Compare with Weeroc chip.


Ordering Options

Code Description
WWSPACIROC3Q SPACIROC 3 - Photomultiplier tubes photon counting read out chip - QFP (Quad Flat Pack)