Psiroc
PIN Diodes, Silicon Strips and GEMs Read-Out Chip
Description
Psiroc is a 64-channel front-end ASIC designed to readout PIN diodes, silicon strips and GEMs, handling detector capacitances ranging from 0 up to few hundreds of pF.
Psiroc allows triggering down to 0.5 fC on sub-20pF detector capacitances and provides dual-gain energy measurement with excellent Signal-to-Noise Ratio on the high gain (SNR over 10 for 0.5 fC) and large dynamic range on the low gain. For input signals over few pC a channel-wise ToT output is also available. Psiroc can be programmed to output the shapers HG/LG, individual triggers or ToT signals (two output pins per channels). The preamplifier gain is adjustable from 125 mV/pC up to 4 V/pC.
Charge measurement is done with peak detectors but those can be used in a track & hold fashion thanks to an internal delay cell. Analog data are outputted on two multiplexed analog output and can be read-out with an external ADC. Shapers shaping time can be adjusted from 20 ns to 3 µs with a step of 20 ns up to 300 ns and a step of 200 ns up to 3 µs. Data acquisition can be done ASIC wide or channel-wise.
Channel-by-channel calibration on the trigger thresholds for time trigger and ToT can be done with individual 6-bit DACs.
Parameters
| Parameters | Value |
|---|---|
| TRLTechnology Readiness Level | 4 - ASIC validated in lab environment |
| Available versions | Psiroc 1: available March 2024 |
| Detector Read-Out | PIN Diodes, Silicon strips, GEMs |
| Number of Channel | 64 |
| Signal Polarity | Positive, Negative |
| Sensitivity | Trigger on 0.5 fC on both polarity |
| Timing Resolution | < 150 ps RMS @ Qin = 4 fC ; Cd/Cf = 20p/1p (pa gain = 1 V/pC) |
| Dynamic Range | Up to 5 pC with low gain charge measurement and up to 100 pC with ToT |
| Packaging & Dimension | BGA 20x20 mm2 |
| Power Consumption | 350 mW – Supply voltage : 1.2 V |
| Inputs | 64 analogue inputs |
| Outputs | - 2 outputs per channel, either :
- 2 multiplexed analogue outputs |
| Internal Programmable Features | - 3 trigger threshold tuning (10bits) - channel-by-channel gain and shaping time adjustment (τ = 20 ns to 3 µs) - individual trigger masking and cell powering |
| Evaluation systems | - Evaluation board : Available April 2024 - Psiroc + PicoTDC evaluation system : Available April 2024 |
Diagram
Psiroc is a GenerIC family IC
GenerIC is a new read-out chip family by Weeroc. GenerIC features fast flip-chip packaged integrated circuits pin-to-pin compatible one with another. Changing detector and its front-end electronic become straightforward with GenerIC family. Pin to pin compatibility allow keeping the same front-end electronics and change detector and front-end ASIC while keeping downstream data stream identical. GenerIC makes easy multi-detector read-out by having a common read-out scheme independant of the detector. Check the GenerIC family :
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DISTRIBUTION NETWORK
All weeroc products are distributed worldwide by CAEN.
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Design review
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