Photomultiplier Tubes Photon Counting Read-Out-Chip
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.
|TRL Technology Readiness Level||9 - Full system running, reliability proven - learn more|
|Detector Read-Out||SiPM, MAPMT|
|Number of Channel||64|
|Sensitivity||Trigger on 1/3 photo-electron or 50 fC with a 106 PM gain|
|Timing Resolution||Not relevant|
|Dynamic Range||Min Gate Time Unit 1.6us, max count 255 per GTU - Photon counting rate > 100MHz|
|Packaging & Dimension||
below 1 mW / channel - supply voltage 3.3V
|Inputs||64 current inputs|
8 serial data outputs (8b) for photon counting
|Internal Programmable Features||