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LIROC

SiPM Analogue Read-out Chip for Lidar and Photon Counting Application

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Highlights

  • Optimized for SiPM

  • Number of channels: 64

  • Outputs: 64 LVDS triggers, 1 64-channel NOR

  • Input Polarity: Positive, Negative

Overview

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.

For more information, visit the Weeroc website. For customer and technical support on Weeroc ASICs, please contact Weeroc directly using the details provided on their Contact us page.

Ordering Options

Code Description
WWLIROC1BAAA

LIROC 1 SiPM Analogue Read-out Chip for Lidar and Photon Counting Application

(Discontinued)

 RoHS
WWLIROC2BAAA

LIROC 2 SiPM Analogue Read-out Chip for Lidar and Photon Counting Application

 RoHS

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    Name
    Package
    No. of Channels
    Compatible Detectors
    Input Polarity
    Main Applications
    Time Measurement
    TEMPOROC
    New

    TEMPOROC

    BGA516

    64

    SIPM, SiPM array

    Negative, Positive

    PHA, ToF, Timing

    TDC

    TRIROC 1A
    Discontinued

    TRIROC 1A

    TFBGA353

    64

    SiPM, SiPM array

    Negative, Positive

    PHA, ToF, Timing

    TDC

    GEMROC 1
    Discontinued

    GEMROC 1

    PQFP160

    64

    Micromegas GEMS

    Negative

    PHA, Timing

    Trigger-based

    PETIROC 2A
    Discontinued

    PETIROC 2A

    TQFP208, TFBGA353

    32

    SiPM, SiPM array, RPCs

    Negative, Positive

    PHA, ToF, Timing

    TDC

    CATIROC 1
    Discontinued

    CATIROC 1

    TQFP208

    16

    PMT, PMT array

    Negative

    PHA, Timing, Zero suppression

    TDC

    PSIROC
    New

    PSIROC

    BGA516

    64

    PIN diodes, Silicon strips, GEMs

    Negative, Positive

    PHA, Energy mass.

    Trigger-based

    CITIROC 1A
    Discontinued

    CITIROC 1A

    PQFP160, TFBGA353

    32

    SiPM, SiPM array

    Positive

    PHA, Photon Counting

    Trigger-based

    MAROC 3A
    Discontinued

    MAROC 3A

    TFBGA353

    64

    MA-PMT, PMT, SIPM, SiPM array

    Negative

    PHA, Photon counting

    Trigger-based

    LIROC

    LIROC

    BGA516

    64

    SIPM, SiPM array

    Negative, Positive

    PHA, Photon counting

    Trigger-based

    POPROC
    New

    POPROC

    BGA516

    64

    MA-PMT, PMT

    Negative

    PHA, Photon counting

    Trigger-based

    RADIOROC 2
    New

    RADIOROC 2

    BGA516

    64

    SIPM, SiPM array

    Positive

    PHA, Photon counting

    Time and Charge (trigger)

    Technical Specifications

    Close

    TRL (Technology Readiness Level)

    4 – ASIC validated in lab environment

    Available versions

    LIROC 1: discontinued
    LIROC 2: available

    Detector Read-Out

    SiPM

    Number of Channel

    64

    Signal Polarity

    Positive and 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 – 20×20 mm²

    Flip-Chip low inductance packaging technology

    Power Consumption

    210 mW – supply voltage 1.2V

    Inputs

    64 analogue inputs with independent SiPM HV adjustments

    Outputs

    • 64 LVDS triggers

    • 1 64-channel NOR

    Internal Programmable Features

    • 64 HV adjustment for SiPM (64 x 6 bit), trigger threshold programming (10bits)

    • 64 x 7 bit channel-wise threshold adjustment

    • ASIC-wise polarity selector

    • Channel-wise pole zero cancellation

    • individual trigger masking and cell powering

    Evaluation systems

    • Liroc Evaluation system

    • Liroc PicoTDC read-out system