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Maroc 3A
Photomultiplier-tubes read-out chip
Description
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.
Parameters
Parameters | Value |
---|---|
TRLTechnology Readiness Level | 9 - Full system running ASIC , reliability proven |
Available versions | - Maroc 3a : available - Maroc 3 : discontinued |
Detector Read-Out | MA-PMT |
Number of Channel | 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 currents 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 |
Diagram
Downloads
Downloads
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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.