Integrated electronic for SiPM and MPPCs

Expectations on front-end electronics have deeply changed with the strong increase of channels in physics experiments and medical imaging. Integration has become a key issue to achieve low-cost and efficient readout of new photo-detectors generation. The Orsay Microelectronic group (OMEGA) has developed an expertise in front-end chip to read out such photodetectors with a high level of integration. A first version of SiPM readout chip has been designed and produced to read out the 8,000-channel Iron-Scintillator hadronic calorimeter prototype currently in test beam at CERN. An input DAC allows a channel by channel 5V adjustment on the SiPM bias ensuring a trimless tuning of the signal to noise ratio of every channel. The read-out chain embeds an AC-coupled charge preamplifier followed by a CRRC² shaper and a track and hold. A new generation of System-on-Chip ASICs called SPIROC (standing for SiPM Integrated Read-Out Chip) is being designed embedding high-voltage fine adjustment, gain correction, amplification, filtering, analogue memory, analogue to digital conversion, digital memory, time measurement, self-triggering capability. This new stand-alone device will allow going further in the integration of high numbers of channels at low cost. Several chip designed by the omega team will be presented and some example of integration will be developed.