PETIROC 2A
SiPM read out for time of flight PET
Features
- TRL Technology Readiness Level 6 – Application prototype available
- Detector Read-Out SiPM, SiPM array
- Number of Channel 32
- Signal Polarity Positive or Negative
- Fast trigger line
- Dynamic Range 0-480 pC i.e. 3000 photoelectrons @ 10^6 SiPM gain
- Fixed gain (40) inverting voltage preamplifier
- Slow shaper with adjustable shaping time from 25 to 100 ns
- Charge measurements by Track&Hold
- Integral Non Linearity : 1% up to 2500 photoelectrons
- 40 ps bin Time to Amplitude converter embedded in each channel
- Power consumption 6mW/channel
Overview
Petiroc 2A is a 32-channel front-end ASIC designed to readout silicon photomultipliers (SiPM) with both polarities for particle time-of-flight measurement applications. Petiroc 2A combines a very fast and low-jitter trigger with accurate charge and time measurements. Energy and time are digitized internally with a 10-bit ADC and 40ps-bin TDC.
The concept of the ASIC is to combine two measurement lines that won’t interfere one with each other to measure both first incident photon timing measurement and whole crystal light charge integration.
An adjustment of the SiPM high voltage is possible using a channel-by-channel input DAC. It allows a fine SiPM gain and dark noise adjustment at the system level to correct for the non-uniformity of SiPMs.
The power consumption is 6 mW/channel, excluding buffers used to output the analogue signals. The main application of Petiroc 2A is PET time-of-flight prototyping but it can also be used for any application that requires both accurate time resolution and precise energy measurement.
Technical Specifications
- Detector Read-Out
SiPM, SiPM array
- Number of Channels
32
- Signal Polarity
Positive or Negative
- Sensitivity
Trigger on first photo-electron
- Timing Resolution
~ 35 ps FWHM in analogue mode (2pe injected) – ~ 100 ps FWHM with internal TDC
- Dynamic Range
3000 photo-electrons (106 SIPM gain), Integral Non Linearity: 1% up to 2500 ph-e
- Packaging & Dimension
TQFP208 – TFBGA353
- Power Consumption
Power supply: 3.3V
192mW Analogue core (excluding analogue outing buffer), 6mW/ch
- Inputs
32 voltage inputs with DC adjustment for SiPM HV tuning
- Outputs
Digital output (energy on 10 bit, time on 10 bit – 40ps bin)
32 trigger outputs
1 multiplexed charge output, 1 multiplexed hit register
2 ASIC trigger outputs (Trigger OR on 32 channels, 2 levels)
- Internal Programmable Features
32 HV adjustment for SiPM (32x8b), trigger threshold adjustment (10b), charge measurement tuning, 32 trigger masks, internal temperature sensor, trigger latch
Compare
Compare with Weeroc chip.
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Ordering Options
| Code | Description |
|---|---|
| WWPETIROC2AB | PETIROC 2A - SiPM read out for time of flight PET - BGA (Ball Grid Array) |
| WWPETIROC2AQ | PETIROC 2A - SiPM read out for time of flight PET- QFP (Quad Flat Pack) |
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