Scientific instrumentation SiPM read out chip
CITIROC 1A
CITIROC 1A WILL BE DEPRECATED – NOT RECOMMENDED FOR NEW DESIGN Please consider Radioroc for new design
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 measured on single photo-electron along with 1% linearity energy measurement up to 2500 p.e. The power consumption is 225mW/ASIC when all stages are ON.
Features
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Optimized for SiPM
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Number of channels: 32
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Type of measurement: Self triggered, Charge
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Outputs: 32 trigger outputs, 2 multiplexed charge output, 2 ASIC trigger output (Trigger OR)
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Input Polarity: Positive
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Main performances: Energy measurement, Time of flight, Photon counting, Input DAC for HV adjustment
CITIROC 1A: Data Sheets
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