CITIROC 1A
Scientific instrumentation SiPM read out chip
Features
- TRL Technology Readiness Level: 8 – Full system using ASIC running – learn more
- Detector Read-Out: SiPM, SiPM array
- Number of Channel: 32
- Signal Polarity: Positive
- Self-Triggers: Programmable 10-bit DAC with min threshold = 1/3 p.e.
- OR trigger: for timestamping and start of conversion
- Dynamic Range: 0-400 pC i.e. 2500 photoelectrons @ 10^6 SiPM gain
- High and low gain branches, with 1:10 ratio for a total 0.95-600 amplification range
- 8-bit input DAC for channel-by-channel fine bias adjustment
- Slow shaper with adjustable shaping time from 12.5 to 87.5 ns
- Energy measurements by Track&Hold or Peak Detector
- 1% linearity energy measurements up to 2500 p.e.
- Power consumption: 7 mW/channel
Overview
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 225 mW/ASIC when all stages are ON.
Technical Specifications
- Detector Read-Out
SiPM, SiPM array
- Number of Channels
32
- Signal Polarity
Positive
- Sensitivity
Trigger on 1/3 of photo-electron
- Timing Resolution
Better than 100 ps RMS on single photo-electron
- Dynamic Range
0-400 pC i.e. 2500 photo-electrons @ 106 SIPM gain
- Packaging & Dimension
TQFP 160 – TFBGA353
- Power Consumption
225mW – Supply voltage : 3.3V
- Inputs
32 voltage inputs with independent SiPM HV adjustments
- Outputs
- 32 trigger outputs
- 2 multiplexed charge output, 1 multiplexed hit register
- 2 ASIC trigger output (Trigger OR)
- Internal Programmable Features
32 HV adjustment for SiPM (32x8bits), Trigger Threshold Adjustment (10bits), channel by channel gain tuning, 32 Trigger Masks, Trigger Latch, internal temperature sensor
Compare
Compare with Weeroc chip.
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Ordering Options
| Code | Description |
|---|---|
| WWCITIROC1AB | CITIROC 1A - Scientific instrumentation SiPM read out chip - BGA (Ball Grid Array) |
| WWCITIROC1AQ | CITIROC 1A - Scientific instrumentation SiPM read out chip - QFP (Quad Flat Pack) |
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