Petiroc2 is a 32-channel front-end ASIC designed to readout silicon photomultipliers (SiPMs) with both polarities for particle time-of-flight measurement applications. Petiroc2 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 25ps-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 signals. The main application of Petiroc 2 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.
|Detector Read-Out||SiPM, SiPM array|
|Number of Channel||32|
|Signal Polarity||Positive or Negative|
|Sensitivity||Trigger on first photo-electron|
|Timing Resolution||below 40ps|
Packaging & Dimension
|Naked die - 4.6 x 4.2 mm - 20mm2, QFP160|
|Dynamic Range||3000 photoelectrons (106 SIPM gain), Integral Non Linearity : 1% up to 2500 photoelectrons|
Power supply : 3.3V
192mW ANalogue cire (excluding outing buffer), 6mw/ch.
|Inputs||32 voltage inputs with DC adjustment for SiPM HV tuning|
|Internal Programmable Features||
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