Multi-purpose SiPM analogue read-out chip
Radioroc 2 is a 64-channel front-end ASIC designed to readout silicon photo-multipliers (SiPM).
Radioroc 2 allows triggering down to 1/3 p.e. and provides dual-gain energy measurement with excellent Signal-to-noise ratio on the high gain (SNR over 10 for single p.e.) and large dynamic range on the low gain. Moreover, Radioroc 2 can output the 64-channel triggers with jitter expected as low as 35 ps FWHM on a single p.e. (ASIC only). Photo-counting is foreseen over 100 MHz.
An adjustment of the SiPM high-voltage (gain) is possible using a channel-by-channel 8-bit DAC connected to the ASIC inputs. Channel-by-channel calibration on the trigger threshold is also possible thanks to 6-bit DACs. Radioroc can be calibrated using the dark noise of the SiPM.
Timing resolution better than 35 ps FWHM is possible along with 1% linearity energy measurement up to 2000 p.e, the dynamic range being limited by the 1.2 V power supply on the input analogue pad. The power consumption is 3.3 mW per channel.
| TRL Technology Readiness Level | 4 - ASIC validated in lab environment |
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| Available versions |
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| Detector Read-Out | SiPM, SiPM array |
| Number of Channel | 64 |
| Signal Polarity | Positive |
| Sensitivity | Trigger on 1/3 photo-electron |
| Timing Resolution |
Better than 55 ps FWHM on single photo-electron (measured) |
| Dynamic Range | up to 2000 photo-electron @ 106 SiPM gain - Peaking time from 20ns to 2us for PSD |
| Packaging & Dimension |
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| Power Consumption |
310 mW - supply voltage 1.2V |
| Inputs | 64 analogue inputs with independant SiPM HV adjustments |
| Outputs |
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| Internal Programmable Features |
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| Evaluation systems |
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