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743 Digitizer Family

16/8 Ch. 12-bit 3.2 GS/s Digitizer

Features

  • 12-bit @ 3.2 GS/s, 1024 samples per event
  • 3.2, 1.6, 0.8, 0.4 GS/s software selectable sampling frequencies
  • Analog inputs on MCX coaxial connectors
  • VME64/VME64X (16 ch.), NIM (8 ch.) and Desktop (8 ch.) modules
  • 2.5 Vpp input dynamic range with programmable DC offset adjustment
  • One discriminator per channel with programmable threshold
  • Adjustable post-trigger delay (up to 1.25 µs @ 3.2 GS/s)
  • One embedded pulser per channel for test and refectometry applications
  • On-board charge calculation for fast histogramming
  • VME, USB and Optical Link communication interfaces
  • Multi-board synchronization features
  • Daisy chain capability
  • Demo software tools, C and LabVIEW libraries, Readout Software

Applications

  • Nuclear and Particle Physics
  • Astroparticle Physics
  • Time of Flight
  • Medical Imaging (PET)

Overview

The 743 is the Switched Capacitor Digitizer family, based on the SAMLONG chip and developed in collaboration with CEA/IRFU, with a good compromise between high sampling frequency (3.2GS/s) and channel density. It can record very fast signals from scintillators coupled to PMTs, Silicon Photomultipliers, APD, Diamond detectors and others, and save them with high efficiency and precision for advanced timing analysis.

The analog inputs are continuously sampled by the 1024 capacitive cells in the SAMLONG chip at a frequency that is software selectable among 3.2 GS/s, 1.6 GS/s, 0.8 GS/s, and 0.4 GS/s. Once the trigger condition is met, the capacitors are released, data is converted by a 12-bit ADC at a lower frequency and stored into a digital memory buffer. As the sampling and the analog-to-digital conversion are not simultaneous, a dead-time is introduced, during which the board cannot accept other triggers.

On-board charge mode allows for charge integration and fast histogramming. The acquisition can be in coincidence, majority mode and externally gated. Multiple boards can be synchronized to build up complex systems.

The acquisition is fully controlled through the WaveCatcher software by CNRS/IN2P3/LAL, which manages the settings, plots and saves waveforms and histograms, and includes advanced measurements (noise, time, rate). Libraries and demo software in C are available for integration and customization of specific acquisition systems.

743 family comes in three form factors: VME (16 input channels), NIM (8 input channels) and Desktop (8 input channels). The communication to and from the board is provided through the following interfaces: USB (Desktop and NIM form factors), VMEbus (VME form factor), and Optical Link (all form factors).

WaveCatcher

Advanced Software Tool for 743 Digitizers

The WaveCatcher software and the Waveform Recording firmware for 743 family is a complete oscilloscope-like tool made by CNRS/IN2P3/ LAL, which is able to control a single board belonging to the CAEN 743 Digitizer series.

A graphical user friendly interface is available to take benefit of all the functions of the hardware: sampling frequency, different trigger modes, waveforms and charge data acquisition, channel pulses, etc.

The system also features different tools for on-line measurements and histograms plotting: graphical cursors, noise level, raw hit rates, charge amplitude and time measurements, time distance histograms between channels (fixed threshold and digital CFD methods), charge histograms, FFT, etc.

All acquired data and computed measurements can be saved to files for further off-line analysis.

Available Firmware:

Immagine esplicativa

Interfaces & I/O

USB
An USB 2.0 link is provided in NIM and Desktop form factors for an easy data readout
VME Digitizer can be controlled via USB using the CAEN V1718 VME-USB2.0 Bridge

Optical Link
An Optical link is provided in any form factor for high performance data readout through CAEN proprietary daisy-chainable CONET communication protocol.
it is possible to connect up to 8/32 ADC modules to a single Optical Link Controller (Mod.A2818/A3818)

Digital I/O
Digital I/Os are provided in VME boards that can be used for individual trigger propagation to external trigger logic. This feature makes VME form factor ideal to scale up the acquisition channels where a global trigger generation is mandatory.

Immagine esplicativa

Models

Model Image Package No. of Channels Max Sampling Rate (MS/s) Bandwidth (MHz) Full Scale Range (V) Resolution (bits) LSB (µV) Board Memory (Samples/ch) Actions
DT5743 DT5743 Desktop 8 3200 (Based on SAMLONG chip: 3.2 GS/s Switched Capacitor Array, 2 channels with 1024 storage cells each.) 500 2.5 12 600 7 events (1 event = 1 k samples) QUOTE
N6743 N6743 NIM 8 3200 (Based on SAMLONG chip: 3.2 GS/s Switched Capacitor Array, 2 channels with 1024 storage cells each.) 500 2.5 12 600 7 events (1 event = 1 k samples) QUOTE
V1743 V1743 VME 16 3200 (Based on SAMLONG chip: 3.2 GS/s Switched Capacitor Array, 2 channels with 1024 storage cells each.) 500 2.5 12 600 7 events (1 event = 1 k samples) QUOTE
VX1743 VX1743 VME64X 16 3200 (Based on SAMLONG chip: 3.2 GS/s Switched Capacitor Array, 2 channels with 1024 storage cells each.) 500 2.5 12 600 7 events (1 event = 1 k samples) QUOTE

Interfaces & I/O

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Software

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