Discontinued

MAROC 3A

Photomultiplier tubes read out chip

Datasheet
Photo of MAROC 3A

  • Optimized for MA-PMT

  • Number of channels: 64

  • Type of measurement: Self triggered, Charge integration, Photon counting, Time (trigger)

  • Outputs: 64 trigger outputs, OR of the 64 triggers for each of the 2 discriminators, 1 multiplexed analog charge output, 1 digital charge measurement (8, 10, or 12 bits)

  • Input Polarity: Negative

  • Main performances: Energy measurement, Photon counting 30MHz, MA-PMT gain adjustment

MAROC3A IS DEPRECATED – NOT RECOMMENDED FOR NEW DESIGN Please consider Poproc for new design

MAROC 3A is a 64-channel front-end ASIC designed to readout negative fast input current pulses such as those provided by Multi Anode Photo Multipliers. Each channel provides a 100% trigger rate for signal greater than 1/3 photoelectron (50fC) and a charge measurement up to 30 photoelectrons (~ 5 pC) with a linearity of 2%. The gain of each channel can be tuned between 0 and 4 thanks to an 8 bit variable gain preamplifier allowing to compensate the non- uniformity between detector channels. A slow shaper combined with two Sample and Hold capacitors allows storing the charge up to 5 pC as well as the baseline. In parallel, 64 trigger outputs are obtained thanks to two possible trigger paths: one made of a bipolar or unipolar fast (15 ns) shaper followed by one discriminator for the photon counting and one made with a bipolar fast shaper (with a lower gain) followed by a discriminator to deliver triggers for larger input charges (> 1 pe). The discriminator thresholds are set by two internal 10-bit DACs. A digital charge output is provided by an integrated 8, 10 or 12 bit Wilkinson ADC.

Ordering Options

Code Description
WWMAROC3ABAA

MAROC 3A – Photomultiplier tubes read out chip – BGA (Ball Grid Array)

(Discontinued)

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    Image
    Name
    Package
    No. of Channels
    Compatible Detectors
    Input Polarity
    Main Applications
    Time Measurement
    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 1
    New

    LIROC 1

    BGA516

    64

    SIPM, SiPM array

    Negative, Positive

    PHA, Photon counting

    Trigger-based

    POPROC

    POPROC

    BGA516

    64

    MA-PMT, PMT

    Negative

    PHA, Photon counting

    Trigger-based

    RADIOROC 2
    Coming Soon

    RADIOROC 2

    BGA516

    64

    SIPM, SiPM array

    Positive

    PHA, Photon counting

    Time and Charge (trigger)

    Technical Specifications

    Close

    Detector Read-Out

    MA-PMT

    Number of Channels

    64

    Signal Polarity

    Negative

    Sensitivity

    Trigger on 1/3 photo-electron

    Timing Resolution

    60ps RMS on single photo-electron, threshold 1/3 of photo-electron

    Dynamic Range

    5 pC (106 PM gain), Integral Non Linearity: 2% up to 5 pC

    Packaging & Dimension

    • PQFP240 (deprecated)

    • TFBGA 353 12x12mm

    Power Consumption

    3.5 mW /ch, power supply= 3.5V

    Inputs

    64 current inputs

    Outputs

    • 64 trigger outputs

    • OR of the 64 triggers for each of the 2 discriminators

    • 1 multiplexed analog charge output

    • 1 digital charge measurement (8, 10, or 12 bits)

    Internal Programmable Features

    • Gain adjustment between 0 and 2 over 8 bits for each input preamp

    • Trigger threshold adjustment (10bits)

    • Analog and digital charge measurement

    • 64 trigger masks

    Evaluation systems

    Evaluation board : Available – 64 channels