Citiroc 1A is a 32-channel front-end ASIC designed to readout silicon photo-multipliers (SiPM) for scientific instrumentation application.
Citiroc 1A allows triggering down to 1/3 pe and provides the charge measurement with a good noise rejection. Moreover, Citiroc 1A outputs the 32-channel triggers with a high resolution timing (better than 100 ps).
An adjustment of the SiPM high-voltage is possible using a channel-by-channel DAC connected to the ASIC inputs. That allows a fine SiPM gain and dark noise adjustment at the system level to correct for the non-uniformity of SiPMs. CITIROC 1A can be calibrated using a unique calibration signal.
Timing measurement better than 100 ps RMS jitter is possible along with 1% linearity energy measurement up to 2500 p.e. The power consumption is 225mW/ASIC when all stages are ON.
|TRL Technology Readiness Level||8 - Full system using ASIC running - learn more|
|Detector Read-Out||SiPM, SiPM array|
|Number of Channel||32|
|Sensitivity||Trigger on 1/3 photo-electron|
|Timing Resolution||better than 100ps RMS on single photo-electron|
|Dynamic Range||0-400 pC i.e 2500 photo-electrons @ 106 SiPM gain|
|Packaging & Dimension||
225 mW when all stages on - supply voltage 3.3V
|Inputs||32 voltage inputs with independant SiPM HV adjustments|
|Internal Programmable Features||
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