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Multi-Purpose Mixed-Signal SiPM read-out ASIC

TemporocTemporoc 2 is a 64-channel front-end ASIC designed to readout silicon photomultipliers (SiPMs) for particle time-of-flight measurement applications. Temporoc 2 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 50ps-bin TDC. In total, Temporoc 2 is capable of providing two distinct time tagging and two energy measurement of each event.
The concept of this ASIC is combining 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. Additionally, Temporoc 2 features clustering triggers readout which could be useful for particle detection with monolithic scintillator.
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 10 mW/channel, excluding buffers used to output the signals. Temporoc 2 is suitable for any application that requires both accurate time resolution and precise energy measurement such as time-of-flight gamma detection. 

TRL Technology Readiness Level  4 - ASIC validated in lab environment
Available versions
  • Temporoc 2 : available June 2024
Detector Read-Out  SiPM, SiPM array
Number of Channel 64
Signal Polarity Positive
Sensitivity Trigger on 1/3 photo-electron
Timing Resolution 

Better than 20 ps RMS on single photo-electron

Dynamic Range up to 3000 photo-electron @ 106 SiPM gain
Packaging & Dimension 
  • FC-BGA 516 20x20mm (Low-inductance flip chip)
Power Consumption

640 mW  - supply voltage 1.2V

Inputs 64 analogue inputs with independant SiPM HV adjustments
  • Digital output (dual ADC and dual TDC per channel) – selectable transmission mode.
  • 1 multiplexed time trigger output
  • 2 ASIC trigger 0R outputs (64 channels, 2 levels)
Internal Programmable Features
  • 64 HV adjustment for SiPM (64x8bits)
  • time trigger threshold adjustment (10bits)
  • charge measurement tuning
  • ADC Peak Sensing
  • 64 trigger masks
  • channel by channel output enable, trigger latch
  • programmable data output
Evaluation systems
  • Evaluation board : Available June 2024

Radioroc Block Scheme