Liroc
SiPM Analogue Read-out Chip for Lidar and Photon Counting Application
Description
Liroc is a 64-channel front-end ASIC designed to readout silicon photo-multipliers (SiPM) for LIDAR application.
Liroc allows triggering down to 1/3 p.e. and provides low-voltage differential trigger output for each channel with an excellent timing resolution (better than 20ps FWHM) and excellent double-peak separation (100% efficiency on 5ns separated single photo-electrons). Liroc allows fast single photon counting over 300MHz per channel.
An adjustment of the SiPM high-voltage (gain) is possible using a channel-by-channel 6-bit DAC connected to the ASIC inputs. Channel-by-channel calibration on the trigger threshold is also possible thanks to 7-bit DACs. Liroc can be calibrated using the dark noise of the SiPM.
Liroc features a GHz measurement line composed of an RF preamplifier woth pole zero cancellation followed by a fast discriminator and low swing LVDS fast driver.
Parameters
| Parameters | Value |
|---|---|
| TRLTechnology Readiness Level | 4 - ASIC validated in lab environment |
| Available versions | 1 : discontinued |
| Detector Read-Out | SiPM |
| Number of Channel | 64 |
| Signal Polarity | Positive, Negative |
| Sensitivity | Trigger on 1/3 photo-electron |
| Timing Resolution | Better than 20 ps FWHM on single photo-electron, Better than 3ns double-peak separation on single photo-electron |
| Dynamic Range | Over 300MHz photon counting rate |
| Packaging & Dimension | BGA 516 - 20x20 mm² Flip-Chip low inductance packaging technology |
| Power Consumption | 210mW – Supply voltage : 1.2 V |
| Inputs | 64 analogue inputs with independent SiPM HV adjustments |
| Outputs |
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| Internal Programmable Features |
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| Evaluation systems |
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Diagram
Liroc 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 :
Evaluate Liroc
Use our open source evaluation system to build your proof of concept. Our evaluation systems are fully open. We provide the schematic that can be used as a reference design, we provide an open source firmware coded in VHDL and an open source software coded in Python.
Weeroc evaluation system features 64 channels of read-out electronics, input is a convenient HE10 connector allowing simple interface with detectors. Output is USB to a computer. Software and firmware allow easy and user-friendly programming of Liroc simple calibration and straight-forward data acquisition.
Downloads
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Downloads
Liroc is used by
DISTRIBUTION NETWORK
All weeroc products are distributed worldwide by CAEN.
Please contact your local representative or get in touch with us.
Design review
Weeroc provide free support to review your board design integrating one of our ASIC. Get in touch with our engineering team to ensure a first-time-good design of your front-end electronics.